Herb & supplement monograph

Lupin Drug Interactions, Uses, Effectiveness, Safety & More

Medically reviewed by ·Updated July 2026
What is this page for?

First and foremost: how Lupin interacts with medications. The heart of this page is the interaction list — every drug Lupin is known to interact with, and how serious each one is.

But these pages have grown well beyond that into a full monograph — what Lupin is, what people use it for and how strong the evidence is, its safety and side effects, and answers to the questions we’re asked most — written and reviewed by the clinical staff at HelloPharmacist. It’s educational information from our licensed clinical databases, not medical advice, and we don’t sell or endorse products. Our editorial policy

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Interaction report

Drugs that interact with Lupin

0 medications have a known interaction with Lupin, graded by severity. Select any drug for the full evidence-based detail.

We don’t currently list any known drug interactions for Lupin. This doesn’t guarantee none exist — always confirm with your pharmacist before combining supplements with your medications.

Read The List Like a Pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

  • Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
  • Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
  • Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
  • No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

  • Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
  • Probable. Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
  • Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

  • Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
  • Each drug listed above links to the full report for that exact Lupin combination — clinical detail, likelihood, evidence level, and citations.
  • Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.
Monograph

Lupin: Uses, Safety & Side Effects

Medically reviewed by · Reviewed July 2026 ·
The bottom line

Lupin is a protein- and fiber-rich legume that is eaten as food and sold as flour or protein powder. Early research suggests it may modestly help with blood sugar, cholesterol, and appetite, but evidence is limited. Its biggest concern is that it is a recognized food allergen and can cross-react in people allergic to peanuts.

Scientific name
Lupinus albus
Family
Fabaceae
Part used
Seeds (beans)
Common forms
Whole pickled beans, flour, protein powder, capsules
People commonly use it for
  • Plant-based protein source
  • Blood sugar support
  • Cholesterol support
  • Weight management
  • Digestive fiber

Popular and traditional uses — not proof it works. See “Uses & effectiveness” below for the evidence.

Safety at a glance
OverallUse caution

Generally safe as food for most people, but it is a known allergen and bitter (raw) varieties must be properly processed.

PregnancyLikely Safe

When processed lupin products (debittered lupin) are used in food amounts. Consuming commercially-prepared lupin products, including flour, bread, pas...

Read the full pregnancy detail
BreastfeedingLikely Safe

When processed lupin products (debittered lupin) are used in food amounts. Consuming commercially-prepared lupin products, including flour, bread, pas...

Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center). Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Jump to a section

Overview

Lupin (also spelled lupine) is a legume in the same plant family as beans, peas, peanuts, and soy. The seeds are eaten as food in many parts of the world, especially around the Mediterranean, Australia, and South America. You may see them sold as whole pickled beans (sometimes called "lupini"), or ground into flour and protein powder used in baking and health foods.

Lupin seeds are naturally high in protein and fiber and low in starch, which is why they are popular as a plant-based protein and in low-carb foods. Some types of lupin are naturally bitter because they contain plant compounds called alkaloids; these "bitter" varieties must be soaked and processed before eating, while "sweet" lupin varieties are low in these compounds.

How it works

Lupin's possible benefits are mostly linked to its high protein and dietary fiber content. Fiber can slow digestion, promote a feeling of fullness, and feed helpful gut bacteria. Lupin protein contains compounds that some laboratory and animal studies suggest may influence cholesterol and blood sugar handling.

It is important to know that many of these proposed mechanisms come from lab dishes and animal research, not large human trials. Bitter lupin also contains quinolizidine alkaloids, which are the bitter, potentially toxic compounds that proper processing removes.

Effectiveness

Does Lupin work?

Here’s what the research actually shows for each use — graded by Natural Medicines and reviewed by .

Evidence overview · 4 uses evaluated
4 Insufficient evidence
How to read these evidence grades

Natural Medicines’ 7-point scale. We show each rating’s label word-for-word.

1EffectiveStrong, consistent evidence it works.
2Likely EffectiveGood evidence, though not yet conclusive.
3Possibly EffectiveSome evidence suggests a benefit.
4Possibly IneffectiveSome evidence it may not help.
5Likely IneffectiveFairly strong evidence it doesn’t help.
6IneffectiveStrong evidence it doesn’t work.
7Insufficient Reliable Evidence to RateToo little research to say either way.

For Lupin, current evidence isn’t strong enough to rate any specific use. The conditions it has been studied for are listed below.

Also studied for 4 conditions — evidence insufficient to rate
Insufficient Reliable Evidence To Rate Diabetes
Rating & evidence shown verbatim from Natural Medicines

The evidence for using lupin to reduce postprandial blood glucose levels and improve glucose control is conflicting.

Insufficient Reliable Evidence To Rate Hypercholesterolemia
Rating & evidence shown verbatim from Natural Medicines

Preliminary clinical research shows that taking lupin protein isolate 25 mg daily for 4 weeks reduces LDL cholesterol when compared to baseline, but is no different than taking milk protein isolate 25 mg with or without arginine. Additional preliminary clinical research shows that taking blue lupin seed fiber 25 grams daily for 4 weeks lowers LDL cholesterol and triglycerides when compared with either a low-fiber control diet or a diet containing citrus fiber 25 grams daily. It is not clear if these reductions would be considered clinically significant, or how they compare with other diets that have been shown to reduce LDL cholesterol levels.

Sources Ref 98316 Ref 98321 Ref 98350
Insufficient Reliable Evidence To Rate Muscle breakdown
Rating & evidence shown verbatim from Natural Medicines

Preliminary clinical research shows that consuming lupin crunchy powder 19 grams daily in addition to receiving neuromuscular electrical stimulation (NMES) twice daily for 60 days reduces muscle atrophy when compared to no intervention in patients wearing an orthosis for 58 days. It is unclear if this benefit is due to lupin supplementation or the NMES.

Sources Ref 98373
Insufficient Reliable Evidence To Rate Obesity
Rating & evidence shown verbatim from Natural Medicines

Preliminary clinical research in overweight patients shows that consuming lupin-enriched foods as 25-40% of the diet for 12 months does not help maintain weight loss when compared with eating a control diet of high-carbohydrate foods. All patients participated in a 3-month weight loss program followed by a stabilization and maintenance phase for 9 months. Additional preliminary clinical research in overweight and obese patients shows that replacing 15% to 20% of usual daily energy intake with lupin seed flour-enriched bread for 16 weeks does not affect body weight when compared with following a regular diet.

Sources Ref 98340 Ref 98354

Source & disclaimer. Effectiveness ratings and evidence summaries are provided by Natural Medicines (Therapeutic Research Center) and shown as licensed. Where Natural Medicines hasn’t rated a use, HelloPharmacist’s pharmacists may add their own reviewed rating and evidence (each such entry is labeled). This is educational information, not medical advice — talk with your pharmacist or doctor before starting, stopping, or changing a supplement.

Safety & precautions

Sweet lupin eaten as a normal food is generally well tolerated by most people. The most important safety issue is allergy. Lupin is a recognized food allergen, and people who are allergic to peanuts may react to lupin because the proteins are similar. In some countries, lupin must be declared on food labels for this reason.

Another concern is bitter (unprocessed) lupin. If bitter lupin beans are not soaked and prepared correctly, the alkaloids they contain can cause poisoning, with symptoms such as nausea, blurred vision, dizziness, and rapid heartbeat. Only eat lupin that has been properly processed.

Pregnancy and breastfeeding: eating sweet, properly prepared lupin as a normal food is likely fine. However, concentrated lupin supplements have not been well studied in pregnancy or breastfeeding, and unprocessed bitter lupin should be avoided. To be safe, talk with your doctor or pharmacist before using lupin supplements during these times.

Side effects

As a food, lupin may cause gas, bloating, or stomach discomfort in some people, especially because of its high fiber content. Drinking water and increasing intake slowly can help.

The most serious risk is an allergic reaction, which can range from mild hives and itching to severe, life-threatening anaphylaxis. Anyone with a known peanut or legume allergy should be especially careful. Eating improperly prepared bitter lupin can also cause alkaloid poisoning with symptoms like nausea, dizziness, and a fast heartbeat — seek medical care if this happens.

Lupin: Reported Adverse Effects

Documented safety reports on Lupin from the evidence-graded Natural Medicines (TRC Healthcare) database, shown word-for-word from the licensed record.

Orally, lupin products with minimal levels of quinolizidine alkaloids (debittered lupin) are well tolerated. Common side effects include bloating, flatulence, and abdominal pain. Lupin can also cause allergic reactions, such as shortness of breath, rash, and anaphylaxis in sensitized individuals.

Bitter lupin that is not properly prepared and contains significant quantities of quinolizidine alkaloids can cause anticholinergic effects that can lead to respiratory failure and death.

  1. Bähr M, Fechner A, Kiehntopf M, Jahreis G. Consuming a mixed diet enriched with lupin protein beneficially affects plasma lipids in hypercholesterolemic subjects: a randomized controlled trial. Clin Nutr. 2015 Feb;34(1):7-14.
  2. Bähr M, Fechner A, Krämer J, Kiehntopf M, Jahreis G. Lupin protein positively affects plasma LDL cholesterol and LDL:HDL cholesterol ratio in hypercholesterolemic adults after four weeks of supplementation: a randomized, controlled crossover study. Nutr J
  3. Fechner A, Fenske K, Jahreis G. Effects of legume kernel fibres and citrus fibre on putative risk factors for colorectal cancer: a randomised, double-blind, crossover human intervention trial. Nutr J. 2013;12:101.
  4. Fechner A, Kiehntopf M, Jahreis G. The formation of short-chain fatty acids is positively associated with the blood lipid-lowering effect of lupin kernel fiber in moderately hypercholesterolemic adults. J Nutr. 2014;144(5):599-607.
  5. Ward NC, Mori TA, Beilin LJ, et al. The effect of regular consumption of lupin-containing foods on glycaemic control and blood pressure in people with type 2 diabetes mellitus. Food Funct. 2020;11(1):741-7.
  6. Ballabio C, Peñas E, Uberti F, et al. Characterization of the sensitization profile to lupin in peanut-allergic children and assessment of cross-reactivity risk. Pediatr Allergy Immunol. 2013;24(3):270-5.
  7. Eguíluz Gracia I, Martínez González de Lema B, Rubio-Pérez M, et al. Allergic reaction to undeclared lupin in a chocolate. J Investig Allergol Clin Immunol. 2015;25(2):140-2.
  8. Gayraud J, Mairesse M, Fontaine JF, et al. The prevalence of sensitization to lupin flour in France and Belgium: a prospective study in 5,366 patients, by the Allergy Vigilance Network. Eur Ann Allergy Clin Immunol. 2009;41(1):17-22.
  9. Lindvik H, Holden L, Løvik M, Cvancarova M, Halvorsen R. Lupin sensitization and clinical allergy in food allergic children in Norway. Acta Paediatr. 2008;97(1):91-5.
  10. Moreno-Ancillo A, Gil-Adrados AC, Domínguez-Noche C, Cosmes PM. Lupine inhalation induced asthma in a child. Pediatr Allergy Immunol. 2005;16(6):542-4.
  11. Shaw J, Roberts G, Grimshaw K, White S, Hourihane J. Lupin allergy in peanut-allergic children and teenagers. Allergy. 2008;63(3):370-3.
  12. Daverio M, Cavicchiolo ME, Grotto P, Lonati D, Cananzi M, Da Dalt L. Bitter lupine beans ingestion in a child: a disregarded cause of acute anticholinergic toxicity. Eur J Pediatr. 2014;173(12):1549-51.
  13. Di Grande A, Paradiso R, Amico S, Fulco G, Fantauzza B, Noto P. Anticholinergic toxicity associated with lupin seed ingestion: case report. Eur J Emerg Med. 2004;11(2):119-20.
  14. Litkey J, Dailey MW. Anticholinergic toxicity associated with the ingestion of lupini beans. Am J Emerg Med. 2007;25(2):215-7.
  15. Pingault NM, Gibbs RA, Barclay AM, Monaghan M. Two cases of anticholinergic syndrome associated with consumption of bitter lupin flour. Med J Aust. 2009;191(3):173-4.
  16. EFSA Panel on Contaminants in the Food Chain (CONTAM), Schrenk D, Bodin L, Chipman JK, et al. Scientific opinion on the risks for animal and human health related to the presence of quinolizidine alkaloids in feed and food, in particular in lupins and lupi
Reports by condition
Allergic rhinitis (hay fever) Immunologic

Orally, lupin can cause allergic reactions such as rhinitis, wheeze, cough, itchy throat, hives, urticaria, lip swelling, breathing difficulties, and anaphylaxis. Observational research has found that the prevalence of lupin allergy in the general population is about 1.6%. In people with lupin allergies, up to 75% also have allergies to other legumes and up to 82% have allergies to pollen. People who are allergic to peanuts can have a cross-sensitivity to lupin.

Occupational inhalation of lupin byproducts can cause sensitization and allergic reactions, with symptoms of rhinitis and wheeze.

  1. US Food and Drug Administration Consumer Updates. Allergies to a legume called lupin: what you need to know. 08/14/2015. https://www.fda.gov/consumers/consumer-updates/allergies-legume-called-lupin-what-you-need-know (Accessed 10/09/2020).
  2. Hieta N, Hasan T, Mäkinen-Kiljunen S, Lammintausta K. Lupin allergy and lupin sensitization among patients with suspected food allergy. Ann Allergy Asthma Immunol. 2009;103(3):233-7.
  3. Reis AM, Fernandes NP, Marques SL, et al. Lupine sensitisation in a population of 1,160 subjects. Allergol Immunopathol (Madr). 2007;35(4):162-3.
  4. Lindvik H, Holden L, Løvik M, Cvancarova M, Halvorsen R. Lupin sensitization and clinical allergy in food allergic children in Norway. Acta Paediatr. 2008;97(1):91-5.
  5. Ballabio C, Peñas E, Uberti F, et al. Characterization of the sensitization profile to lupin in peanut-allergic children and assessment of cross-reactivity risk. Pediatr Allergy Immunol. 2013;24(3):270-5.
  6. Eguíluz Gracia I, Martínez González de Lema B, Rubio-Pérez M, et al. Allergic reaction to undeclared lupin in a chocolate. J Investig Allergol Clin Immunol. 2015;25(2):140-2.
  7. Gayraud J, Mairesse M, Fontaine JF, et al. The prevalence of sensitization to lupin flour in France and Belgium: a prospective study in 5,366 patients, by the Allergy Vigilance Network. Eur Ann Allergy Clin Immunol. 2009;41(1):17-22.
  8. Moreno-Ancillo A, Gil-Adrados AC, Domínguez-Noche C, Cosmes PM. Lupine inhalation induced asthma in a child. Pediatr Allergy Immunol. 2005;16(6):542-4.
  9. Peeters KA, Koppelman SJ, Penninks AH, et al. Clinical relevance of sensitization to lupine in peanut-sensitized adults. Allergy. 2009;64(4):549-55.
  10. Shaw J, Roberts G, Grimshaw K, White S, Hourihane J. Lupin allergy in peanut-allergic children and teenagers. Allergy. 2008;63(3):370-3.
  11. Campbell CP, Jackson AS, Johnson AR, Thomas PS, Yates DH. Occupational sensitization to lupin in the workplace: occupational asthma, rhinitis, and work-aggravated asthma. J Allergy Clin Immunol. 2007;119(5):1133-9.
Anxiety Neurologic/CNS

Orally, lupin products that have not been processed properly and contain significant quantities of quinolizidine alkaloids cause serious anticholinergic effects, including headache, dizziness, drowsiness, anxiety, seizures, and decreased sweating.

  1. Daverio M, Cavicchiolo ME, Grotto P, Lonati D, Cananzi M, Da Dalt L. Bitter lupine beans ingestion in a child: a disregarded cause of acute anticholinergic toxicity. Eur J Pediatr. 2014;173(12):1549-51.
  2. Di Grande A, Paradiso R, Amico S, Fulco G, Fantauzza B, Noto P. Anticholinergic toxicity associated with lupin seed ingestion: case report. Eur J Emerg Med. 2004;11(2):119-20.
  3. Litkey J, Dailey MW. Anticholinergic toxicity associated with the ingestion of lupini beans. Am J Emerg Med. 2007;25(2):215-7.
  4. Pingault NM, Gibbs RA, Barclay AM, Monaghan M. Two cases of anticholinergic syndrome associated with consumption of bitter lupin flour. Med J Aust. 2009;191(3):173-4.
  5. EFSA Panel on Contaminants in the Food Chain (CONTAM), Schrenk D, Bodin L, Chipman JK, et al. Scientific opinion on the risks for animal and human health related to the presence of quinolizidine alkaloids in feed and food, in particular in lupins and lupi
Anxiety Other

Orally, bitter lupin beans that are not properly processed (debittered) can cause serious anticholinergic effects due to the quinolizidine alkaloids present. There are numerous case reports of these effects in children and adults who consumed improperly prepared lupin products. Symptoms include blurred vision, dizziness, drowsiness, headache, hypotension, photophobia, constipation, nausea, urinary retention, muscle weakness, anxiety, tachycardia, dry mouth, decreased sweating, mydriasis, and seizures. Toxicity can progress to paralysis of respiratory muscles, causing respiratory arrest and death. The acute lethal dose of quinolizidine alkaloids for infants and children is approximately 10 mg/kg body weight; the acute lethal dose for adults is approximately 25 mg/kg body weight.

  1. Daverio M, Cavicchiolo ME, Grotto P, Lonati D, Cananzi M, Da Dalt L. Bitter lupine beans ingestion in a child: a disregarded cause of acute anticholinergic toxicity. Eur J Pediatr. 2014;173(12):1549-51.
  2. Di Grande A, Paradiso R, Amico S, Fulco G, Fantauzza B, Noto P. Anticholinergic toxicity associated with lupin seed ingestion: case report. Eur J Emerg Med. 2004;11(2):119-20.
  3. Litkey J, Dailey MW. Anticholinergic toxicity associated with the ingestion of lupini beans. Am J Emerg Med. 2007;25(2):215-7.
  4. Pingault NM, Gibbs RA, Barclay AM, Monaghan M. Two cases of anticholinergic syndrome associated with consumption of bitter lupin flour. Med J Aust. 2009;191(3):173-4.
  5. EFSA Panel on Contaminants in the Food Chain (CONTAM), Schrenk D, Bodin L, Chipman JK, et al. Scientific opinion on the risks for animal and human health related to the presence of quinolizidine alkaloids in feed and food, in particular in lupins and lupi
  6. Carvajal-Larenas FE, Linnemann AR, Nout MJ, Koziol M, van Boekel MA. Lupinus mutabilis: Composition, Uses, Toxicology, and Debittering. Crit Rev Food Sci Nutr. 2016;56(9):1454-87.
Constipation Gastrointestinal

Orally, lupin can cause flatulence, bloating, and abdominal pain.

Lupin products that have not been processed properly and contain significant quantities of quinolizidine alkaloids cause serious anticholinergic effects including dry mouth, nausea, and constipation.

  1. Bähr M, Fechner A, Krämer J, Kiehntopf M, Jahreis G. Lupin protein positively affects plasma LDL cholesterol and LDL:HDL cholesterol ratio in hypercholesterolemic adults after four weeks of supplementation: a randomized, controlled crossover study. Nutr J
  2. Ward NC, Mori TA, Beilin LJ, et al. The effect of regular consumption of lupin-containing foods on glycaemic control and blood pressure in people with type 2 diabetes mellitus. Food Funct. 2020;11(1):741-7.
  3. Daverio M, Cavicchiolo ME, Grotto P, Lonati D, Cananzi M, Da Dalt L. Bitter lupine beans ingestion in a child: a disregarded cause of acute anticholinergic toxicity. Eur J Pediatr. 2014;173(12):1549-51.
  4. Di Grande A, Paradiso R, Amico S, Fulco G, Fantauzza B, Noto P. Anticholinergic toxicity associated with lupin seed ingestion: case report. Eur J Emerg Med. 2004;11(2):119-20.
  5. Litkey J, Dailey MW. Anticholinergic toxicity associated with the ingestion of lupini beans. Am J Emerg Med. 2007;25(2):215-7.
  6. Pingault NM, Gibbs RA, Barclay AM, Monaghan M. Two cases of anticholinergic syndrome associated with consumption of bitter lupin flour. Med J Aust. 2009;191(3):173-4.
  7. EFSA Panel on Contaminants in the Food Chain (CONTAM), Schrenk D, Bodin L, Chipman JK, et al. Scientific opinion on the risks for animal and human health related to the presence of quinolizidine alkaloids in feed and food, in particular in lupins and lupi
Hypotension Cardiovascular

Orally, lupin products that have not been processed properly and contain significant quantities of quinolizidine alkaloids cause serious anticholinergic effects including hypotension and tachycardia.

  1. EFSA Panel on Contaminants in the Food Chain (CONTAM), Schrenk D, Bodin L, Chipman JK, et al. Scientific opinion on the risks for animal and human health related to the presence of quinolizidine alkaloids in feed and food, in particular in lupins and lupi
Urinary retention Genitourinary

Orally, lupin products that have not been processed properly and contain significant quantities of quinolizidine alkaloids cause serious anticholinergic effects including urinary retention.

  1. EFSA Panel on Contaminants in the Food Chain (CONTAM), Schrenk D, Bodin L, Chipman JK, et al. Scientific opinion on the risks for animal and human health related to the presence of quinolizidine alkaloids in feed and food, in particular in lupins and lupi
DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.

Adverse-effects data: Natural Medicines, Therapeutic Research Center

Dosing

There is no official or standardized supplement dose for lupin. As a food, people eat it in amounts similar to other beans or use lupin flour and protein powder as ingredients in recipes.

If you use a lupin supplement or protein product, follow the directions on the product label, and start with a small amount to see how your body tolerates the fiber. Because doses and product quality vary, it is best to ask a pharmacist or doctor before adding a concentrated lupin supplement to your routine.

Pregnancy & Breastfeeding

Lupin & Pregnancy

Likely Safe

When processed lupin products (debittered lupin) are used in food amounts. Consuming commercially-prepared lupin products, including flour, bread, pasta, and breakfast cereals processed to contain less than 0.02% quinolizidine alkaloids, has not been associated with toxicity.

  1. EFSA Panel on Contaminants in the Food Chain (CONTAM), Schrenk D, Bodin L, Chipman JK, et al. Scientific opinion on the risks for animal and human health related to the presence of quinolizidine alkaloids in feed and food, in particular in lupins and lupi
  2. Frick KM, Kamphuis LG, Siddique KHM, Singh KB, Foley RC. Quinolizidine alkaloid biosynthesis in lupins and prospects for grain quality improvement. Front Plant Sci. 2017;8:87. doi: 10.3389/fpls.2017.00087.
Likely Unsafe

When bitter lupin products that contain toxic levels of quinolizidine alkaloids are used orally. These alkaloids have anticholinergic effects which can lead to respiratory failure and death. The quinolizidine alkaloid sparteine can also induce contractions of uterine smooth muscle.

  1. Daverio M, Cavicchiolo ME, Grotto P, Lonati D, Cananzi M, Da Dalt L. Bitter lupine beans ingestion in a child: a disregarded cause of acute anticholinergic toxicity. Eur J Pediatr. 2014;173(12):1549-51.
  2. Di Grande A, Paradiso R, Amico S, Fulco G, Fantauzza B, Noto P. Anticholinergic toxicity associated with lupin seed ingestion: case report. Eur J Emerg Med. 2004;11(2):119-20.
  3. Litkey J, Dailey MW. Anticholinergic toxicity associated with the ingestion of lupini beans. Am J Emerg Med. 2007;25(2):215-7.
  4. Pingault NM, Gibbs RA, Barclay AM, Monaghan M. Two cases of anticholinergic syndrome associated with consumption of bitter lupin flour. Med J Aust. 2009;191(3):173-4.
  5. EFSA Panel on Contaminants in the Food Chain (CONTAM), Schrenk D, Bodin L, Chipman JK, et al. Scientific opinion on the risks for animal and human health related to the presence of quinolizidine alkaloids in feed and food, in particular in lupins and lupi

Lupin & Breastfeeding

Likely Safe

When processed lupin products (debittered lupin) are used in food amounts. Consuming commercially-prepared lupin products, including flour, bread, pasta, and breakfast cereals processed to contain less than 0.02% quinolizidine alkaloids, has not been associated with toxicity.

  1. EFSA Panel on Contaminants in the Food Chain (CONTAM), Schrenk D, Bodin L, Chipman JK, et al. Scientific opinion on the risks for animal and human health related to the presence of quinolizidine alkaloids in feed and food, in particular in lupins and lupi
  2. Frick KM, Kamphuis LG, Siddique KHM, Singh KB, Foley RC. Quinolizidine alkaloid biosynthesis in lupins and prospects for grain quality improvement. Front Plant Sci. 2017;8:87. doi: 10.3389/fpls.2017.00087.
Likely Unsafe

When bitter lupin products that contain toxic levels of quinolizidine alkaloids are used orally. These alkaloids have anticholinergic effects which can lead to respiratory failure and death. The quinolizidine alkaloid sparteine can also induce contractions of uterine smooth muscle.

  1. Daverio M, Cavicchiolo ME, Grotto P, Lonati D, Cananzi M, Da Dalt L. Bitter lupine beans ingestion in a child: a disregarded cause of acute anticholinergic toxicity. Eur J Pediatr. 2014;173(12):1549-51.
  2. Di Grande A, Paradiso R, Amico S, Fulco G, Fantauzza B, Noto P. Anticholinergic toxicity associated with lupin seed ingestion: case report. Eur J Emerg Med. 2004;11(2):119-20.
  3. Litkey J, Dailey MW. Anticholinergic toxicity associated with the ingestion of lupini beans. Am J Emerg Med. 2007;25(2):215-7.
  4. Pingault NM, Gibbs RA, Barclay AM, Monaghan M. Two cases of anticholinergic syndrome associated with consumption of bitter lupin flour. Med J Aust. 2009;191(3):173-4.
  5. EFSA Panel on Contaminants in the Food Chain (CONTAM), Schrenk D, Bodin L, Chipman JK, et al. Scientific opinion on the risks for animal and human health related to the presence of quinolizidine alkaloids in feed and food, in particular in lupins and lupi
DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.

© 2026 Therapeutic Research Center

Pregnancy & lactation ratings: Natural Medicines, Therapeutic Research Center

References & further reading

The 26 references that drive our Lupin monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

  1. Bähr M, Fechner A, Kiehntopf M, Jahreis G. Consuming a mixed diet enriched with lupin protein beneficially affects plasma lipids in hypercholesterolemic subjects: a randomized controlled trial. Clin Nutr. 2015 Feb;34(1):7-14. PubMed
  2. Bähr M, Fechner A, Krämer J, Kiehntopf M, Jahreis G. Lupin protein positively affects plasma LDL cholesterol and LDL:HDL cholesterol ratio in hypercholesterolemic adults after four weeks of supplementation: a randomized, controlled crossover study. Nutr J PubMed
  3. Ballabio C, Peñas E, Uberti F, et al. Characterization of the sensitization profile to lupin in peanut-allergic children and assessment of cross-reactivity risk. Pediatr Allergy Immunol. 2013;24(3):270-5. PubMed
  4. Belski R, Mori TA, Puddey IB, et al. Effects of lupin-enriched foods on body composition and cardiovascular disease risk factors: a 12-month randomized controlled weight loss trial. Int J Obes (Lond). 2011;35(6):810-9. PubMed
  5. Campbell CP, Jackson AS, Johnson AR, Thomas PS, Yates DH. Occupational sensitization to lupin in the workplace: occupational asthma, rhinitis, and work-aggravated asthma. J Allergy Clin Immunol. 2007;119(5):1133-9. PubMed
  6. Carvajal-Larenas FE, Linnemann AR, Nout MJ, Koziol M, van Boekel MA. Lupinus mutabilis: Composition, Uses, Toxicology, and Debittering. Crit Rev Food Sci Nutr. 2016;56(9):1454-87.
  7. Daverio M, Cavicchiolo ME, Grotto P, Lonati D, Cananzi M, Da Dalt L. Bitter lupine beans ingestion in a child: a disregarded cause of acute anticholinergic toxicity. Eur J Pediatr. 2014;173(12):1549-51. PubMed
  8. Di Grande A, Paradiso R, Amico S, Fulco G, Fantauzza B, Noto P. Anticholinergic toxicity associated with lupin seed ingestion: case report. Eur J Emerg Med. 2004;11(2):119-20. PubMed
  9. Eguíluz Gracia I, Martínez González de Lema B, Rubio-Pérez M, et al. Allergic reaction to undeclared lupin in a chocolate. J Investig Allergol Clin Immunol. 2015;25(2):140-2.
  10. Fechner A, Fenske K, Jahreis G. Effects of legume kernel fibres and citrus fibre on putative risk factors for colorectal cancer: a randomised, double-blind, crossover human intervention trial. Nutr J. 2013;12:101. PubMed
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  14. Hodgson JM, Lee YP, Puddey IB, et al. Effects of increasing dietary protein and fibre intake with lupin on body weight and composition and blood lipids in overweight men and women. Int J Obes (Lond). 2010;34(6):1086-94. PubMed
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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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Brands that make products with Lupin

1 brand in our database make a supplement containing Lupin.

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Supplement products with Lupin

2 products in our database contain Lupin. Open any to see its full ingredient list and every drug interaction we check.

Pharmacist Counseling Corner

Lupin: Common Questions

What is Lupin used for, and does it work?
People use Lupin for a range of reasons, but according to the Natural Medicines database the current clinical evidence is insufficient to confirm it works for the specific conditions it has been studied for. See the graded list on this page, and talk to your pharmacist or doctor before relying on it for any condition.
Does Lupin interact with prescription medications?
We do not currently list any known drug interactions for Lupin. This does not guarantee that none exist, so always confirm with your pharmacist before combining it with your medications.
How are Lupin interactions rated?
Each interaction is graded major, moderate, or minor based on how clinically significant it is and the strength of the evidence behind it. Major interactions are the most serious and are best avoided, or used only under close professional supervision.
Is it safe to take Lupin with my medications?
It depends on the specific medication. Some combinations are fine, while others call for monitoring, timing changes, or should be avoided. Check your exact drug above and confirm with your pharmacist or doctor before starting, stopping, or changing anything.
Where does this Lupin interaction information come from?
Our interaction data is built on the Natural Medicines database — an evidence-graded reference for vitamins, herbs, and supplements — and is reviewed by licensed HelloPharmacist pharmacists, who may add clinical context.
What is Lupin used for?
Lupin is mainly used as a high-protein, high-fiber food and as flour or protein powder in baking. Some people use it hoping to support blood sugar, cholesterol, or weight goals, though the evidence for these uses is still limited.
Is Lupin safe to eat?
Sweet, properly processed Lupin is safe for most people. The main concerns are allergic reactions, especially in people allergic to peanuts, and poisoning from bitter Lupin that has not been correctly soaked and prepared.
Can I eat Lupin if I'm allergic to peanuts?
Be very cautious. Lupin can cross-react with peanut allergy because the proteins are similar, so people with a peanut or legume allergy should check with their doctor before eating Lupin.
Why are some Lupin beans bitter?
Bitter Lupin varieties contain natural alkaloids that taste bitter and can be toxic if eaten raw. These beans must be soaked and processed to remove the alkaloids before they are safe to eat, while "sweet" Lupin is naturally low in these compounds.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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