L-Cysteine HCl Ingredients & Drug Interactions
What is this page for?
First and foremost: checking L-Cysteine HCl 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
L-Cysteine HCl is a dietary supplement by BulkSupplements.com with 1 active ingredient. Its ingredients are commonly taken for antioxidant support, skin and hair health, liver support.Based on those ingredients, 86 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are L-Cysteine Hydrochloride. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against L-Cysteine HCl by BulkSupplements.com
Ask about any prescription or over-the-counter medication and we check it for interactions with L-Cysteine HCl by BulkSupplements.com — and tell you which ingredient is responsible.
AI summaries are generated from our interaction database for education only — always confirm with your pharmacist. How we use AI
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HelloPharmacist Scorecard of L-Cysteine HCl by BulkSupplements.com
Four independent checks of what is known — a summary of the available information, not a grade of the product itself.
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
The stated purpose hasn't been mapped to our evidence data yet.
Why this rating?
- We haven't mapped this product's purpose to our evidence data yet — it'll be graded on the next content refresh.
Every active ingredient lists its own amount on the label.
Why this rating?
- The label discloses an exact amount for 1 of its 1 active ingredient.
- No proprietary blends here — you can verify the dose of every single component.
The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.
Why this rating?
- 1 of the 1 matched ingredient can interact with medications — L-cysteine.
- The most serious interaction on file is rated Moderate.
- Some involve high-stakes drug classes: diabetes medications.
- For scale: 86 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.
Safety data exists for these ingredients, but with some important gaps.
Why this rating?
- We hold adverse-effect (side-effect) data for 0 of the 1 matched ingredient.
- Pregnancy & breastfeeding safety ratings cover 1 of 1.
- General safety write-ups exist for 1 of 1.
- Remember: this measures how much safety information exists. Thin data is not the same as being safe.
HelloPharmacist summaryFully disclosed formula with no assessable stated purpose. Moderate medication interactions have been identified, and some safety-information gaps remain.
Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Jun 20, 2024.
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
General information
Key facts about L-Cysteine HCl, straight from the product label.
| Brand | BulkSupplements.com |
|---|---|
| Barcode (UPC) | X000KPNVVB |
| Net contents | 1 Kilogram(s); 35.3 Ounce(s) |
| Market status | On market |
| Date entered into DSLD | Jun 20, 2024 |
| DSLD ID | 312130 |
| Product type | Amino Acid/protein |
| Supplement form | Powder |
| Dietary claims / uses | Nutrient, All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Gluten Free, Dairy Free |
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 L-Cysteine HCl by BulkSupplements.com, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| L-Cysteine Hydrochloride | 500 mg | -- |
Tap any ingredient to jump to its full detail below.
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.
Brand IP Statement(s)
BulkSupplements.com Clean & pure bulk supplements
Formulation
Free of: Added sugar, soy, dairy, yeast, gluten, additives
Suggested/Recommended/Usage/Directions
Suggested use: As a dietary supplement, take 500 mg (about 1/5 tsp) one to three times daily, or as directed by a physician.
General Statements
Use an accurate milligram scale.
New
Storage
Contents are sold by weight, not volume. Settling may occur. Store in a dry, cool place
FDA Disclaimer Statement
Warning: This product is not intended to diagnose, treat, cure, or prevent any disease.
Precautions
Always consult a physician before taking any dietary supplement.
Keep out of reach of children.
Formula
L-Cysteine HCl Monohydrate
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
L-Cysteine HCl by BulkSupplements.com label
The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.
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)The Ingredients in L-Cysteine HCl by BulkSupplements.com
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size500 mg Dosage formPowder Servings per container2000 Amounts shown are per serving.
L-Cysteine Hydrochloride
Interacts with86 drugs
L-cysteine is a sulfur-containing amino acid your body uses to make proteins and the antioxidant glutathione. Most people get enough from food, and su...
L-Cysteine Hydrochloride monograph & interactionsL-Cysteine HCl by BulkSupplements.com Drug Interactions
L-Cysteine HCl contains a single active ingredient, and it has known interactions with 86 medications. Here’s the picture, then you can look up your own drug.
Want to check YOUR meds against L-Cysteine HCl?
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 checkerIngredients driving the most interactions
Individual Drug Interactions
The ingredients in L-Cysteine HCl interact with 86 drugs. Click any drug to see the details.
1 of the 1 ingredient in L-Cysteine HCl interact with drugs. Each result below shows which ingredient is responsible. L-Cysteine Hydrochloride
AcarboseGlucobay, Prandase, Precose
How Acarbose interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Acarbose interactionAcetohexamideDymelor
How Acetohexamide interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Acetohexamide interactionAlbiglutideTanzeum
How Albiglutide interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Albiglutide interactionAlogliptinNesina
How Alogliptin interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Alogliptin interactionAlogliptin, MetforminKazano
How Alogliptin, Metformin interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Alogliptin, Metformin interactionAlogliptin, PioglitazoneOseni
How Alogliptin, Pioglitazone interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Alogliptin, Pioglitazone interactionAntidiabetes, Dipeptidyl Peptidase-4 (dpp-iv) InhibitorGlyxambi
How Antidiabetes, Dipeptidyl Peptidase-4 (dpp-iv) Inhibitor interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Antidiabetes, Dipeptidyl Peptidase-4 (dpp-iv) Inhibitor interactionCanagliflozinInvokana
How Canagliflozin interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Canagliflozin interactionCanagliflozin, MetforminInvokamet
How Canagliflozin, Metformin interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Canagliflozin, Metformin interactionCanagliflozin, Metformin HydrochlorideInvokamet XR
How Canagliflozin, Metformin Hydrochloride interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Canagliflozin, Metformin Hydrochloride interactionChlorpropamideChlorpropam, Diabinese
How Chlorpropamide interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Chlorpropamide interactionDapagliflozinFarxiga
How Dapagliflozin interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Dapagliflozin interactionDapagliflozin Propanediol, MetforminXigduo XR
How Dapagliflozin Propanediol, Metformin interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Dapagliflozin Propanediol, Metformin interactionDapagliflozin Propanediol, Saxagliptin HydrochlorideQtern
How Dapagliflozin Propanediol, Saxagliptin Hydrochloride interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Dapagliflozin Propanediol, Saxagliptin Hydrochloride interactionDapagliflozin, Metformin Hydrochloride, Saxagliptin HydrochlorideQternmet XR
How Dapagliflozin, Metformin Hydrochloride, Saxagliptin Hydrochloride interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Dapagliflozin, Metformin Hydrochloride, Saxagliptin Hydrochloride interactionDasiglucagon HydrochlorideZegalogue
How Dasiglucagon Hydrochloride interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Dasiglucagon Hydrochloride interactionDulaglutideTrulicity
How Dulaglutide interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Dulaglutide interactionEmpagliflozinJardiance
How Empagliflozin interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Empagliflozin interactionEmpagliflozin, Linagliptin, Metformin HydrochlorideTrijardy XR
How Empagliflozin, Linagliptin, Metformin Hydrochloride interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Empagliflozin, Linagliptin, Metformin Hydrochloride interactionEmpagliflozin, MetforminSynjardy
How Empagliflozin, Metformin interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Empagliflozin, Metformin interactionEmpagliflozin, Metformin HydrochlorideSynjardy XR
How Empagliflozin, Metformin Hydrochloride interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Empagliflozin, Metformin Hydrochloride interactionErtugliflozinSteglatro
How Ertugliflozin interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Ertugliflozin interactionErtugliflozin, Metformin HydrochlorideSegluromet
How Ertugliflozin, Metformin Hydrochloride interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Ertugliflozin, Metformin Hydrochloride interactionExenatideBydureon, Byetta
How Exenatide interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Exenatide interactionExenatide SyntheticBydureon BCISE
How Exenatide Synthetic interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Exenatide Synthetic interactionGliclazideDiamicron
How Gliclazide interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Gliclazide interactionGlimepirideAmaryl
How Glimepiride interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Glimepiride interactionGlipizideGlucotrol, Glucotrol XL
How Glipizide interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Glipizide interactionGlipizide, MetforminMetaglip
How Glipizide, Metformin interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Glipizide, Metformin interactionGlucagonBaqsimi, Glucagon
How Glucagon interacts with L-Cysteine HCl — through 1 ingredient. Tap an ingredient for the detail:
L-cysteine HydrochlorideAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full L-cysteine Hydrochloride + Glucagon interactionEach ingredient & the kinds of drugs it affects
For each ingredient in L-Cysteine HCl with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.
L-Cysteine Hydrochloride
Antidiabetes Drugs
Theoretically, taking L-cysteine supplements with antidiabetes drugs might increase the risk of hypoglycemia.
Animal research suggests that L-cysteine can have hypoglycemic effects.
Brand information
Manufacturer and brand details for L-Cysteine HCl, from the product label.
BulkSupplements.com
See all BulkSupplements.com products- Name
- BulkSupplements.com
- Street Address
- 7511 Eastgate Rd
- City
- Henderson
- State
- NV
- ZipCode
- 89011
- Web Address
- BulkSupplements.com
L-Cysteine HCl by BulkSupplements.com: Common Questions
Does L-Cysteine HCl by BulkSupplements.com interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if L-Cysteine HCl is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
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.
The Full Monographs Behind L-Cysteine HCl’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
L-Cysteine HCl'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.
- NIH Dietary Supplement Label Database (DSLD) — The official product label on file for this supplement.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference behind the ingredient interaction data.
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 2 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.
L-cysteine 2 references
- Dowlati Y, Maheux M, Meyer JH. The effect of oral L-cysteine on breast milk and plasma cysteine concentrations. Neuropsychiatr Dis Treat 2020;16:3163-3172.
- Lee S, Han KH, Nakamura Y, et al. Dietary L-cysteine improves the antioxidative potential and lipid metabolism in rats fed a normal diet. Biosci Biotechnol Biochem 2013;77(7):1430-4.
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