Interactions on record — worth a quick check against your medications. Based on 4 of 5 ingredients. Check your meds →
Dietary supplement

Nitrulline Ingredients & Drug Interactions

by BodyTech Elite

Nitrulline label
See full label image
Tablet Or Pill Category: Other Combinations
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Nitrulline against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

Nitrulline is a dietary supplement by BodyTech Elite with 5 active ingredients. Its ingredients are commonly taken for diabetic nerve pain (neuropathy), blood sugar support in diabetes, antioxidant support.Based on those ingredients, 1,185 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Bioperine, Alpha Lipoic Acid, L-Citrulline Malate. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

Jump to a section

Check Your Meds Against Nitrulline by BodyTech Elite

Ask about any prescription or over-the-counter medication and we check it for interactions with Nitrulline by BodyTech Elite — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Nitrulline by BodyTech Elite

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Aug 27, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 5 of its 5 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

BodyTech Elite Nitrulline contains five active ingredients. Alpha-lipoic acid is an antioxidant studied for blood sugar control and cholesterol support.

L-Taurine is an amino acid that may help liver and heart function. L-Citrulline Malate converts to L-arginine in your body and supports blood flow and athletic performance.

Bioperine is black pepper extract, added to increase absorption of other ingredients. Arginine Alpha-Ketoglutarate is an amino acid compound we cannot verify against drug interactions.

The product also contains inactive ingredients—microcrystalline cellulose, stearic acid, methylcellulose, magnesium stearate, silicon dioxide, purified water, hydroxypropyl methylcellulose, polyethylene glycol, and titanium dioxide—which are fillers and binders.

Does it work?

Moderate evidence
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Moderate

Some clinical evidence supports this product's ingredients for its stated purpose, but it isn't conclusive.

Why this rating?
  • The label markets this product for: nitric oxide support for blood flow and endurance.
  • We looked for evidence on: Athletic performance, Cardiovascular disease (CVD), Erectile dysfunction (ED), Exercise-induced muscle soreness, Hypertension, Muscle strength — and 3 related terms.
  • The strongest evidence on file: L-citrulline is rated "Possibly Effective" for Athletic performance (Natural Medicines).
  • Also on file: Alpha-lipoic Acid is rated "Insufficient Reliable Evidence To Rate" for Cardiovascular disease (CVD), Erectile dysfunction (ED), Hypertension, Muscle strength.
  • Also on file: Black Pepper is rated "Insufficient Reliable Evidence To Rate" for Athletic performance.

Alpha-lipoic acid is possibly effective for nerve pain (diabetic neuropathy) and may help with cholesterol and weight. L-Taurine is possibly effective for liver inflammation and heart failure, though it's possibly ineffective for weight loss.

L-Citrulline malate is possibly effective for athletic performance but possibly ineffective for age-related muscle loss (sarcopenia); evidence is insufficient for heart disease and diabetes. Bioperine's effectiveness isn't established in our data—studies haven't reliably rated it for allergies, asthma, athletic performance, headache, depression, or diarrhea.

The evidence, ingredient by ingredient Alpha-lipoic Acid Taurine L-citrulline Black Pepper

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 4 of the 4 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 4 of 4.
  • General safety write-ups exist for 4 of 4.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Alpha-lipoic acid is generally well tolerated but can lower blood sugar and is best used under medical guidance. Common side effects include headache, heartburn, nausea, and vomiting; dizziness and rash are also reported.

Rare serious concerns include a condition called insulin autoimmune syndrome. During pregnancy, there isn't enough safety information, so it's best to avoid it; the same applies while breastfeeding.

L-Taurine is generally well tolerated in the short term in healthy adults, though long-term safety is less certain. Common side effects are constipation, diarrhea, and indigestion.

It occurs naturally in breast milk, but supplement safety hasn't been well studied—use caution. L-Citrulline is generally well tolerated; gastrointestinal discomfort and heartburn are most common.

There isn't enough safety data in pregnancy or while breastfeeding, so avoid it. Bioperine is generally safe in food amounts; concentrated supplements should be used cautiously.

As a spice it's well tolerated; burning aftertaste, indigestion, and reduced taste are possible.

Side effects, ingredient by ingredient Alpha-lipoic Acid Taurine L-citrulline Black Pepper

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 4 of the 4 matched ingredients can interact with medications — Alpha-lipoic Acid, Black Pepper, Taurine, L-citrulline.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; immunosuppressants / transplant drugs; cancer treatments; diabetes medications; lithium.
  • For scale: 1,186 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Check before taking if you're on blood thinners or antiplatelet drugs, blood pressure medications, erectile dysfunction drugs, thyroid hormone replacement, diabetes medication, chemotherapy (especially alkylating agents or antitumor antibiotics), propranolol, nevirapine, rifampin, phenytoin, cyclosporine, pentobarbital, atorvastatin, or theophylline—Bioperine may raise levels of several of these, and other ingredients carry Moderate risks with the first few categories listed. If you take lithium, discuss this product with your doctor or pharmacist first.

All of these concerns are Moderate severity.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

This product combines ingredients studied for cardiovascular support, athletic performance, and metabolic health, but it carries multiple Moderate drug interactions—especially with blood pressure drugs, blood thinners, chemotherapy, and certain heart and anti-seizure medications. If you take any prescription medication, blood pressure drugs, or are on chemotherapy, check your exact medications with the tool on this page and talk with your doctor or pharmacist before starting.

Avoid during pregnancy and while breastfeeding unless your healthcare provider advises otherwise.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 4 of 5 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Oct 23, 2019.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Nitrulline, straight from the product label.

Brand BodyTech Elite
Barcode (UPC) 766536022663
Net contents 180 Tablet(s)
Market status On market
Date entered into DSLD Oct 23, 2019
DSLD ID 207862
Product type Other Combinations
Supplement form Tablet Or Pill
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years)
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Nitrulline by BodyTech Elite, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
3 Tablet(s)
Maximum serving Sizes:
3 Tablet(s)
Servings per container
60
UPC/BARCODE
766536022663
IngredientAmount% DV
Alpha Lipoic Acid25 mg--
L-Taurine500 mg--
L-Citrulline Malate1000 mg--
Bioperine5 mg--
Arginine Alpha-Ketoglutarate3000 mg--

Other ingredients: Microcrystalline Cellulose, Stearic Acid, Methylcellulose, Magnesium Stearate, Silicon Dioxide, purified Water, Hydroxypropyl Methylcellulose, Polyethylene Glycol, Titanium Dioxide

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
General Statements

Nitric oxide potentiator

Supports blood flow Promotes endurance

Nitrulline is designed to help stimulate the synthesis of Nitric Oxide (NO). The release of Nitric Oxide during weight training enhances blood flow to aid in the delivery of oxygen and nutrients to help energize and nourish working muscles.

Visit www.bodytech.com or call 1-800-223-1216 for more information and to reorder.

FDA Statement of Identity

Dietary Supplement

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Suggested/Recommended/Usage/Directions

Directions: Take three (3) tablets, three (3) times daily, preferably on an empty stomach before morning, mid-day, and evening meals. Take with plenty of water daily.

Precautions

Warning: Consult your healthcare provider prior to use if you are pregnant, nursing, taking any medication or have any medical conditions.

Keep out of reach of children.

Tamper evident Do not use if outer seal is broken or missing.

Brand IP Statement(s)

Bioperine is a patented product from Sabinsa Corporation.

Storage

Store in a cool, dry place.

Seals/Symbols

Quality Promise Tested & Trusted

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Nitrulline by BodyTech Elite label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Nitrulline label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in Nitrulline by BodyTech Elite

These are the 5 active ingredients this product is made of. Select any to open its full monograph.

Serving size3 Tablet(s) Dosage formTablet Or Pill Servings per container60 Amounts shown are per serving.

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

Alpha Lipoic Acid

Interacts with
263 drugs
25 mg per serving

Alpha-lipoic acid (ALA) is an antioxidant made naturally by the body and found in small amounts in foods. It is most studied for diabetic nerve pain,...

Alpha Lipoic Acid monograph & interactions

L-Taurine

Interacts with
173 drugs
500 mg per serving

Taurine is an amino acid your body makes naturally and that you also get from animal foods. It is widely used in energy drinks and sports supplements,...

L-Taurine monograph & interactions

L-Citrulline Malate

Interacts with
178 drugs
1000 mg per serving

L-citrulline is an amino acid that the body turns into L-arginine to help make nitric oxide, which relaxes blood vessels and may improve blood flow. I...

L-Citrulline Malate monograph & interactions

Bioperine

Interacts with
1,019 drugs
5 mg per serving

Black pepper is a common kitchen spice that is generally safe in the amounts used in food. Its extract, piperine, is mostly added to supplements to he...

Bioperine monograph & interactions

Arginine Alpha-Ketoglutarate

3000 mg per serving

Other (inactive) ingredients: Microcrystalline Cellulose, Stearic Acid, Methylcellulose, Magnesium Stearate, Silicon Dioxide, Purified Water, Hydroxypropyl Methylcellulose, Polyethylene Glycol, Titanium Dioxide. These complete the product’s ingredient list but are not active constituents.

Interaction report

Nitrulline by BodyTech Elite Drug Interactions

Want to check YOUR meds against Nitrulline?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
1,185Drugs
1,144 Moderate 41 Minor

Ingredients driving the most interactions

Bioperine 1,019
Alpha Lipoic Acid 263
L-Citrulline Malate 178
L-Taurine 173

Individual Drug Interactions

The ingredients in Nitrulline interact with 1,185 drugs. Click any drug to see the details.

4 of the 5 ingredients in Nitrulline interact with drugs. Each result below shows which ingredient is responsible. Bioperine Alpha Lipoic Acid L-Citrulline Malate L-Taurine

Each ingredient & the kinds of drugs it affects

For each ingredient in Nitrulline with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.

Bioperine17 drug types · 1,019 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, black pepper might increase the risk of bleeding when taken with antiplatelet or anticoagulant drugs.
In vitro research shows that piperine, a constituent of black pepper, seems to inhibit platelet aggregation. This has not been reported in humans.

Likelihood Possible Evidence D
Antidiabetes Drugs

Theoretically, black pepper might increase the risk of hypoglycemia when taken with antidiabetes drugs.
Animal research shows that piperine, a constituent of black pepper, can reduce blood glucose levels. Monitor blood glucose levels closely. Dose adjustments might be necessary.

Likelihood Possible Evidence D
Atorvastatin (Lipitor)

Theoretically, black pepper might increase blood levels of atorvastatin.
Animal research shows that taking piperine, a constituent of black pepper, 35 mg/kg can increase the maximum serum concentration of atorvastatin three-fold. This has not been reported in humans.

Likelihood Possible Evidence D
Cyclosporine (Neoral, Sandimmune)

Theoretically, black pepper might increase the effects and side effects of cyclosporine.
In vitro research shows that piperine, a constituent of black pepper, increases the bioavailability of cyclosporine. This has not been reported in humans.

Likelihood Possible Evidence D
Cytochrome P450 2D6 (Cyp2D6) Substrates

Theoretically, black pepper might increase levels of drugs metabolized by CYP2D6.
In vitro research suggests that some constituents of black pepper inhibit CYP2D6. This has not been reported in humans.

Likelihood Possible Evidence D
Cytochrome P450 3A4 (Cyp3A4) Substrates

Theoretically, black pepper might increase levels of drugs metabolized by CYP3A4.
In vitro research and pharmacokinetic simulation data suggest that piperine, a constituent of black pepper, as well as the pepper fruit seem to inhibit CYP3A4. This has not been reported in humans.

Likelihood Possible Evidence D
Lithium

Theoretically, black pepper might increase blood levels of lithium due to its diuretic effects. The dose of lithium might need to be reduced.
Black pepper is thought to have diuretic properties.

Likelihood Probable Evidence D
Nevirapine (Viramune)

Black pepper might increase blood levels of nevirapine.
Clinical research shows that piperine, a constituent of black pepper, increases the plasma concentration of nevirapine. However, no adverse effects were observed in this study.

Likelihood Probable Evidence D
P-Glycoprotein Substrates

Theoretically, black pepper might increase levels of P-glycoprotein substrates.
In vitro research shows that piperine, a constituent of black pepper, seems to inhibit P-glycoprotein.

Likelihood Possible Evidence D
Pentobarbital (Nembutal)

Theoretically, black pepper might increase the sedative effects of pentobarbital.
Animal research shows that piperine, a constituent of black pepper, increases pentobarbital-induced sleeping time.

Likelihood Possible Evidence D
Phenytoin (Dilantin)

Black pepper might increase blood levels of phenytoin.
Clinical research shows that piperine, a constituent of black pepper, seems to increase absorption, slow elimination, and increase levels of phenytoin. Taking a single dose of black pepper 1 gram along with phenytoin seems to double the serum concentration of phenytoin. Consuming a soup with black pepper providing piperine 44 mg/200 mL of soup along with phenytoin also seems to increase phenytoin levels when compared with consuming the same soup without black pepper.

Likelihood Possible Evidence B
Propranolol (Inderal)

Black pepper might increase blood levels of propranolol.
Clinical research shows that piperine, a constituent of black pepper, seems to increase absorption and slow elimination of propranolol.

Likelihood Possible Evidence B
Rifampin (Rifadin)

Black pepper might increase blood levels of rifampin.
Clinical research shows that piperine, a constituent of black pepper, seems to increase absorption and serum levels of rifampin.

Likelihood Possible Evidence B
Theophylline

Black pepper might increase blood levels of theophylline.
Clinical research shows that piperine, a constituent of black pepper, seems to increase absorption and slow elimination of theophylline.

Likelihood Possible Evidence D
Amoxicillin (Amoxil, Trimox)

Theoretically, black pepper might increase the effects and side effects of amoxicillin.
Animal research shows that taking piperine, a constituent of black pepper, with amoxicillin increases plasma levels of amoxicillin. This has not been reported in humans.

Likelihood Possible Evidence D
Carbamazepine (Tegretol)

Theoretically, black pepper might increase blood levels of carbamazepine, potentially increasing the effects and side effects of carbamazepine.
One clinical study in patients taking carbamazepine 300 mg or 500 mg twice daily shows that taking a single 20 mg dose of purified piperine, a constituent of black pepper, increases carbamazepine levels. Piperine may increase carbamazepine absorption by increasing blood flow to the GI tract, increasing the surface area of the small intestine, or inhibiting cytochrome P450 3A4 (CYP3A4) in the gut wall. Absorption was significantly increased by 7-10 mcg/mL/hour. The time to eliminate carbamazepine was also increased by 4-8 hours. Although carbamazepine levels were increased, this did not appear to increase side effects. In vitro research also shows that piperine can increase carbamazepine levels by 11% in a time-dependent manner.

Likelihood Possible Evidence B
Cytochrome P450 1A2 (Cyp1A2) Substrates

Theoretically, black pepper might decrease levels and clinical effects of drugs metabolized by CYP1A2.
In vitro research suggests that black pepper induces CYP1A2. This has not been reported in humans.

Likelihood Possible Evidence D
Bioperine full monograph & interactions

Alpha Lipoic Acid5 drug types · 263 drugs

Alkylating Agents

Theoretically, the antioxidant effects of alpha-lipoic acid might alter the effectiveness of alkylating agents.
The use of antioxidants like alpha-lipoic acid during chemotherapy is controversial. There are concerns that antioxidants could reduce the activity of chemotherapy drugs that generate free radicals. However, some researchers theorize that antioxidants might make chemotherapy more effective by reducing oxidative stress that might interfere with apoptosis (cell death) of cancer cells. More evidence is needed to determine what effect, if any, antioxidants such as alpha-lipoic acid have on chemotherapy. Advise patients to consult their oncologist before using alpha-lipoic acid.

Likelihood Possible Evidence D
Anticoagulant/Antiplatelet Drugs

Theoretically, alpha-lipoic acid may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
In vitro, alpha-lipoic acid inhibits platelet aggregation.

Likelihood Possible Evidence D
Antitumor Antibiotics

Theoretically, the antioxidant effects of alpha-lipoic acid might alter the effectiveness of antitumor antibiotics.
The use of antioxidants like alpha-lipoic acid during chemotherapy is controversial. There are concerns that antioxidants could reduce the activity of antitumor antibiotic drugs, which work by generating free radicals. However, some researchers theorize that antioxidants might make chemotherapy more effective by reducing oxidative stress that might interfere with apoptosis (cell death) of cancer cells. More evidence is needed to determine what effect, if any, antioxidants such as alpha-lipoic acid have on chemotherapy involving antitumor antibiotics. Advise patients to consult their oncologist before using alpha-lipoic acid.

Likelihood Possible Evidence D
Thyroid Hormone

Theoretically, alpha-lipoic acid might decrease the effects of thyroid hormone drugs.
Animal research suggests that co-administration of thyroxine with alpha-lipoic acid reduces conversion into the active T3 form.

Likelihood Possible Evidence D
Antidiabetes Drugs

Theoretically, taking alpha-lipoic acid with antidiabetes drugs might increase the risk of hypoglycemia.
Although some small clinical studies have suggested that alpha-lipoic acid can lower blood glucose levels, larger clinical studies in patients with diabetes have shown no clinically meaningful effect. Additionally, co-administration of single doses of alpha-lipoic acid and glyburide or acarbose did not cause detectable drug interactions in healthy volunteers.

Likelihood Unlikely Evidence B
Alpha Lipoic Acid full monograph & interactions

L-Citrulline Malate2 drug types · 178 drugs

Antihypertensive Drugs

Theoretically, concomitant use of L-citrulline with antihypertensive drugs might have additive effects and increase the chance of hypotension.
L-citrulline is converted to L-arginine, which can increase nitric oxide and cause vasodilation. However, a meta-analysis of 5 small clinical studies suggests that taking L-citrulline 3-6 grams daily for 1-8 weeks does not lower blood pressure when compared with control.

Likelihood Possible Evidence B
Phosphodiesterase-5 Inhibitors

Theoretically, concurrent use of phosphodiesterase-5 (PDE-5) inhibitors and L-citrulline might result in additive vasodilation.
L-citrulline is converted to L-arginine, which can increase nitric oxide and cause vasodilation. Theoretically, taking L-arginine with PDE-5 inhibitors might have additive vasodilatory and hypotensive effects. However, in studies evaluating the combined use of L-arginine and sildenafil for erectile dysfunction, hypotension was not reported.

Likelihood Possible Evidence D
L-Citrulline Malate full monograph & interactions

L-Taurine2 drug types · 173 drugs

Antihypertensive Drugs

Theoretically, taurine might increase the risk of hypotension when taken with antihypertensive drugs.
Some clinical evidence suggests that taurine can reduce both systolic and diastolic blood pressure.

Likelihood Probable Evidence D
Lithium

Theoretically, taurine might reduce excretion and increase plasma levels of lithium.
Taurine is thought to have diuretic properties, which might reduce the excretion of lithium.

Likelihood Probable Evidence D
L-Taurine full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Nitrulline, from the product label.

BodyTech Elite

See all BodyTech Elite products
Name
Vitamin Shoppe, Inc.
City
Secaucus
State
NJ
ZipCode
07094
Phone Number
1-800-223-1216
Web Address
www.bodytech.com
Pharmacist Counseling Corner

Nitrulline by BodyTech Elite: Common Questions

Does Nitrulline by BodyTech Elite interact with any medications?
Yes. Based on its ingredients, Nitrulline has a known interaction with 1,185 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Nitrulline contains 5 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Can I take this while I'm pregnant?
Alpha-lipoic acid and L-citrulline malate both carry safety data advising against use in pregnancy—there isn't enough reliable information to know if they're safe. L-Taurine and Bioperine don't have clear pregnancy warnings on file. Talk with your doctor or pharmacist about whether this product is right for you during pregnancy.
What is Bioperine and why is it in here?
Bioperine is black pepper extract, added to supplement formulas because it may help your body absorb other ingredients better. It's generally safe in food amounts, though concentrated supplements should be used more cautiously.
Can this help me build muscle or improve my workout?
L-Citrulline malate is possibly effective for athletic performance. The evidence for the other ingredients—alpha-lipoic acid, L-taurine, and Bioperine—isn't established enough in our data to say they help with workouts.
What are the most common side effects I might notice?
From alpha-lipoic acid: headache, heartburn, nausea, or vomiting. From L-taurine: constipation, diarrhea, or indigestion. From L-citrulline: stomach discomfort or heartburn. From Bioperine: a burning aftertaste or indigestion. Most people tolerate these ingredients well.
Is this safe to take long-term?
Long-term safety isn't fully studied for L-taurine or L-citrulline malate. Alpha-lipoic acid can lower blood sugar, so it's best used under medical guidance. If you're thinking about taking this for months, talk with your doctor or pharmacist first.
Can I use this while breastfeeding?
L-Taurine occurs naturally in breast milk, but supplement safety hasn't been well studied—use caution and check with your doctor or pharmacist. L-Citrulline malate safety while breastfeeding is unknown. Data on the others isn't on file, so discuss this product with your healthcare provider.

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

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Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Nitrulline label
Go deeper

The Full Monographs Behind Nitrulline’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Alpha-lipoic Acid

Interacts with 263 drugs

Alpha-lipoic acid (ALA) is an antioxidant made naturally by the body and found in small amounts in foods. It is most studied for diabetic nerve pain, where some evidence suggests it may help...

Read the full Alpha-lipoic Acid monograph → Herb & supplement monograph

Taurine

Interacts with 173 drugs

Taurine is an amino acid your body makes naturally and that you also get from animal foods. It is widely used in energy drinks and sports supplements, and short-term use appears generally sa...

Read the full Taurine monograph → Herb & supplement monograph

L-citrulline

Interacts with 178 drugs

L-citrulline is an amino acid that the body turns into L-arginine to help make nitric oxide, which relaxes blood vessels and may improve blood flow. It is popular for exercise performance an...

Read the full L-citrulline monograph → Herb & supplement monograph

Black Pepper

Interacts with 1,019 drugs

Black pepper is a common kitchen spice that is generally safe in the amounts used in food. Its extract, piperine, is mostly added to supplements to help the body absorb other ingredients (li...

Read the full Black Pepper monograph →
Sources

Sources & How We Checked

Nitrulline's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 106 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Alpha-lipoic Acid 48 references
  1. Labriola D, Livingston R. Possible interactions between dietary antioxidants and chemotherapy. Oncology 1999;13:1003-8.
  2. Anon. Alpha-lipoic acid. Altern Med Rev 1998;3:308-10.
  3. Konrad T, Vicini P, Kusterer K, et al. Alpha-lipoic acid treatment decreases serum lactate and pyruvate concentrations and improves glucose effectiveness in lean and obese patients with Type 2 diabetes. Diabetes Care 1999;22:280-7. PubMed
  4. Ziegler D, Hanefeld M, Ruhnau KJ, et al. Treatment of symptomatic diabetic peripheral neuropathy with the antioxidant alpha-lipoic acid: A 3-week, multicentre randomized controlled trial (ALADIN Study). Diabetologia 1995;38:1425-33.
  5. Gleiter CH, Schreeb KH, Freudenthaler S, et al. Lack of interaction between thioctic acid, glibenclamide and acarbose. Br J Clin Pharmacol 1999;48:819-25. PubMed
  6. Jacob S, Henriksen EJ, Tritschler HJ, et al. Improvement of insulin-stimulated glucose-disposal in type 2 diabetes after repeated parenteral administration of thioctic acid. Exp Clin Endocrinol Diabet 1996;104:284-8. PubMed
  7. Jacob S, Henriksen EJ, Schiemann AL, et al. Enhancement of glucose disposal in patients with type 2 diabetes by alpha-lipoic acid. Arzneimittelforschung 1995;45:872-4.
  8. Jacob S, Ruus P, Hermann R, et al. Oral administration of RAC-alpha-lipoic acid modulates insulin sensitivity in patients with type-2 diabetes mellitus: a placebo-controlled, pilot trial. Free Rad Biol Med 1999;27:309-14.
  9. Segermann J, Hotze A, Ulrich H, Rao GS. Effect of alpha-lipoic acid on the peripheral conversion of thyroxine to triiodothyronine and on serum lipid-, protein- and glucose levels. Arzneimittelforschung 1991;41:1294-8.
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Black Pepper 29 references
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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.

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