Glycine 600 Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Glycine 600 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
Glycine 600 is a dietary supplement by ProCaps Laboratories with 1 active ingredient. Its ingredients are commonly taken for sleep quality and insomnia, relaxation, cognitive function.Based on those ingredients, 1 medication has a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Glycine. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Glycine 600 by ProCaps Laboratories
Ask about any prescription or over-the-counter medication and we check it for interactions with Glycine 600 by ProCaps Laboratories — 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 Glycine 600 by ProCaps Laboratories
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.
What’s inside
Full disclosure
Glycine 600 contains one active ingredient: 600 mg of glycine, an amino acid your body naturally makes. The capsule itself is gelatin.
Glycine plays a role in protein synthesis and may have roles in nervous system function, which is why it's studied for various conditions.
Does it work?
Not established
The evidence for glycine's effectiveness is limited and mixed. For schizophrenia, there's possibly effective evidence — meaning some research suggests it could help, though we'd need more study to be sure.
For other conditions this product is sometimes used for — including attention deficit-hyperactivity disorder (ADHD), benign prostatic hyperplasia (BPH), 3-phosphoglycerate dehydrogenase (3-PGDH) deficiency, and cystic fibrosis — the evidence isn't established in our data.
How safe is it?
Well-documented data
Glycine is generally well tolerated at typical doses, but long-term safety data are limited. A small number of people have reported mild sedation, irritability, insomnia, fatigue, memory problems, headache, or sensory changes, though we can't be certain glycine caused them.
Rarely, some people experience soft stools, nausea, vomiting, or upper stomach discomfort — these symptoms go away quickly if you stop taking it. There isn't enough reliable safety data to know whether glycine is safe in pregnancy or while breastfeeding, so talk with your doctor or pharmacist before use if either applies to you.
Meds to double-check
Moderate interaction found
If you take clozapine (Clozaril) for schizophrenia, check with your doctor or pharmacist before adding glycine — it may worsen your symptoms. No other medication interactions are documented for glycine in our data, but use the search tool on this page to verify your exact medications.
The bottom line
Scorecard at a glanceFully disclosed formula with no established evidence rating for its marketed use. Moderate medication interactions have been identified, and safety information is well characterized.
Glycine 600 may help with schizophrenia according to some research, but the evidence is still developing. If you're on clozapine, this product could make your symptoms worse — don't add it without checking with your doctor first.
For any other medications, run them through our checker below before you start. Talk to your pharmacist if you have questions about whether it's right for you.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Jan 23, 2025.
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 Glycine 600, straight from the product label.
| Brand | ProCaps Laboratories |
|---|---|
| Barcode (UPC) | 668211 |
| Net contents | 360 Easy-To-Swallow Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Jan 23, 2025 |
| DSLD ID | 320131 |
| Product type | Amino Acid/protein |
| Supplement form | Capsule |
| Dietary claims / uses | Nutrient, All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), No Allergies, Gluten Free, Dairy Free, Sugar 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 Glycine 600 by ProCaps Laboratories, sourced from the NIH Dietary Supplement Label Database.
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.
Suggested/Recommended/Usage/Directions
Suggested Use Consume one capsule daily. You can increase your intake as required or as guided by your physician.
General Statements
For questions about the use of this product call 800.800.1200.
Questions? Reorders? 800.800.1200 procaps.com Andrew Lessman
Formulation
Since 1979, unsurpassed purity, quality and efficacy. 100% Solar production Zero-carbon footprint
100% Solar
Protein's most fundamental building block Supports healthy glucose metabolism Essential for glutathione synthesis
Contains no additives or common allergens Contains no milk, soy, yeast, corn, wheat, gluten, sodium, salt, sugar, fat, cholesterol, color, preservative, common allergens, genetically modified (GMO) ingredients or manufacturing additives.
Brand IP Statement(s)
Copyright 2023 ProCaps Laboratories
FDA Statement of Identity
Dietary Supplement
Formula
Glycine 600 is a pure source of the simplest, yet uniquely important, amino acid glycine. Glycine's name results from its subtly sweet taste and the Greek word for sweet (glyks). Glycine has become a popular supplement because of its role in, among other things, supporting healthy blood sugar balance and glucose metabolism. Glycine is the principal amino acid present in collagen, which is the body's predominant protein, and therefore plays a critical structural role in healthy skin, bones, joints, blood vessels and connective tissue (tendons, ligaments and cartilage). Glycine is also one of the three amino acids required to create glutathione, our body's most important and powerful protective molecule. Glycine also acts as an important neurotransmitter, while also serving as a signaling molecule in the immune system. In short, despite glycine's small size and simple structure, it plays a multitude of critical roles in the most important systems in our body.
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.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Glycine 600 by ProCaps Laboratories 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 Glycine 600 by ProCaps Laboratories
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size1 Capsule(s) Dosage formCapsule Servings per container360 Amounts shown are per serving.
Glycine
Interacts with1 drug
Glycine is a non-essential amino acid your body makes on its own and that also appears in protein-rich foods. It is most studied for improving sleep q...
Glycine monograph & interactionsOther (inactive) ingredients: Gelatin. These complete the product’s ingredient list but are not active constituents.
Glycine 600 by ProCaps Laboratories Drug Interactions
HelloPharmacist Interaction Report
Glycine 600 by ProCaps Laboratories has one documented interaction to watch for.
If you're on clozapine (Clozaril) for schizophrenia, adding glycine may actually worsen your symptoms. A small clinical study showed that combining the two made schizophrenia symptoms worse than clozapine alone, though we don't fully understand why this happens — it's classified as a Moderate interaction.
Read the full breakdown — every affected drug type, severity by severity
No other medication interactions are documented in our data for glycine. That said, the absence of documented interactions isn't a guarantee that none exist.
Use the medication checker on this page to look up your exact medications before you start, especially if you're on clozapine.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Glycine 600?
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 Glycine 600 interact with 1 drug. Click any drug to see the details.
1 of the 1 ingredient in Glycine 600 interact with drugs. Each result below shows which ingredient is responsible. Glycine
ClozapineClozaril, Versacloz
How Clozapine interacts with Glycine 600 — through 1 ingredient. Tap an ingredient for the detail:
GlycineClozapine (clozaril) Moderate
Interaction Summary
Theoretically, glycine might decrease the effectiveness of clozapine.
Read the full Glycine + Clozapine interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Glycine 600 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.
Glycine
Clozapine (Clozaril)
Theoretically, glycine might decrease the effectiveness of clozapine.
One small clinical study in patients with schizophrenia shows that adding glycine to clozapine therapy worsens symptoms of schizophrenia when compared with clozapine alone. The mechanism of this interaction is unclear.
Brand information
Manufacturer and brand details for Glycine 600, from the product label.
ProCaps Laboratories
See all ProCaps Laboratories products- Name
- ProCaps Labs
- City
- Henderson
- State
- NV
- ZipCode
- 89011
- Phone Number
- 800.800.1200
- Web Address
- ProCaps.com
Glycine 600 by ProCaps Laboratories: Common Questions
Does Glycine 600 by ProCaps Laboratories interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
What is glycine and what does it do in the body?
Is glycine safe if I'm pregnant or breastfeeding?
What side effects might I experience?
Does glycine work for ADHD or benign prostate problems?
Will this product interact with my blood pressure or heart medications?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Glycine 600 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 Glycine 600’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Glycine 600'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 5 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.
Glycine 5 references
- Heresco-Levy U, Javitt DC, Ermilov M, et al. Efficacy of high-dose glycine in the treatment of enduring negative symptoms of schizophrenia. Arch Gen Psychiatry 1999;56:29-36.. PubMed
- Potkin SG, Jin Y, Bunney BG, Costa J, Gulasekaram B. Effect of clozapine and adjunctive high-dose glycine in treatment-resistant schizophrenia. Am J Psychiatry 1999;156:145-7.. PubMed
- Gusev EI, Skvortsova VI, Dambinova SA, et al. Neuroprotective effects of glycine for therapy of acute ischaemic stroke. Cerebrovasc Dis 2000;10:49-60. PubMed
- Inagawa K, Kawai N, Ono K, Sukegawa E, Tsubuku S, Takahashi M. Assessment of acute adverse effects of glycine ingestion at a high dose in human volunteers. Seikatsu Eisei. 2006; 50:27-32.
- Woods SW, Walsh BC, Hawkins KA, Miller TJ, Saksa JR, D'Souza DC, Pearlson GD, Javitt DC, McGlashan TH, Krystal JH. Glycine treatment of the risk syndrome for psychosis: report of two pilot studies. Eur Neuropsychopharmacol. 2013 Aug;23(8):931-40. PubMed
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