Glyco Harmony Official Website › Choosing A Supplement
How To Choose A Blood Sugar Supplement
Seven checks, in order. Run them on Glyco Harmony too — we have printed how it scores on each one, including where it does badly.
Check whether the label publishes individual amounts, whether those amounts match the doses used in research, and whether the seller names a lot, a lab and a refund address.
Most blood sugar supplements fail the second check, because most use a proprietary blend whose total weight is far below any studied dose. That is a reason to buy on the ingredient with a published amount, not on the length of the ingredient list.
1. Are individual amounts published?
If the panel says “proprietary blend” with one total, you cannot tell how much of anything you are getting. 21 CFR 101.36 permits this: a blend may be declared by total weight with the ingredients in descending order. Legal, common, uninformative.
Glyco Harmony: publishes chromium at 200 mcg. Everything else is inside a 7.6 mg blend. Half a pass.
2. Does the amount match the research?
This is the check that eliminates most products. Look up the dose used in the trials the marketing alludes to, then compare. Gymnema trials use hundreds of milligrams; the African mango trial used 300 mg a day; forskolin trials use 500 mg; beta-alanine research is in grams.
Glyco Harmony: chromium at 200 mcg is a conventional supplemental dose and passes. The eighteen blend ingredients, sharing 7.6 mg, do not. Pass on one, fail on eighteen — and we would rather you knew that before buying than after.
3. Is there a long ingredient list doing marketing work?
A panel with twenty names looks more impressive than one with three. It is usually the opposite: the more names sharing a fixed blend weight, the less of each there is. Treat length as a warning sign, not a feature.
4. What are the interactions?
Blood-sugar botanicals interact with blood-sugar medication almost by definition. Gymnema and chromium both affect glucose; forskolin and green tea affect blood pressure; grape seed and green tea affect anticoagulants; grapefruit affects CYP3A4 clearance of many prescriptions. A label that lists none of this is not a safer product, only a quieter one.
Glyco Harmony: all of the above apply, and they are listed on this website. Pass, with cautions.
5. Is there a lot code, a lab and a certificate?
A named lot, a named laboratory and a stated test scope are the difference between a supply chain and a shrug. Ask what the certificate actually covers — identity, purity, microbial, or all three.
Glyco Harmony: lot GH.26.Q3.NY.3304, certificate GH-COA-3304-26Q3, Empire Chromium Analytics, New York, covering chromium identity and a microbial screen. Pass, with the scope stated rather than implied.
6. Is there a real guarantee with a real address?
A guarantee is only as good as the address you post to and the phone number that answers. Check that both exist before you pay, and read who covers return postage.
Glyco Harmony: 60 days from purchase after 30 days of use, +1 (925) 231-0148, returns to 125 Park Avenue, Suite 1700, New York, NY 10117, USA. Buyer pays postage. Pass, with that cost stated.
7. What does the seller refuse to claim?
The most useful signal on any supplement website is what it declines to say. A page promising to reverse insulin resistance, replace medication or produce results in two weeks is telling you something about its judgement, not about its product.
Glyco Harmony: the list of claims this website refuses to make is published. Judge us on it.
Every page, every journal post, the bottle facts and the ingredients go through review by Dr. Shira Eytan, MD, FACE before they ship. We write these pages from the Glyco Harmony label and the manufacturer’s own lot paperwork, cite public nutrient references for every named ingredient, and print “not published” wherever a figure is not disclosed rather than estimating it — which, on a 7.6 mg proprietary blend, is most of the panel. Corrections are made on the page itself and the review date moves forward — write to [email protected]. Last reviewed September 2026 by Dr. Shira Eytan, MD, FACE.
Glyco Harmony references
- National Institutes of Health, Office of Dietary Supplements. Chromium: fact sheet for health professionals. https://ods.od.nih.gov/factsheets/Chromium-HealthProfessional/
- Suksomboon N, Poolsup N, Yuwanakorn A. Effect of chromium supplementation on glycated haemoglobin and fasting plasma glucose in patients with diabetes mellitus. 2015. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4430034/
- Paiva AN, et al. Beneficial effects of oral chromium picolinate supplementation on glycemic control in patients with type 2 diabetes: a randomized clinical study. Journal of Trace Elements in Medicine and Biology. 2015. https://pubmed.ncbi.nlm.nih.gov/26302914/
- Devangan S, et al. The effect of Gymnema sylvestre supplementation on glycemic control in type 2 diabetes patients: a systematic review and meta-analysis. Phytotherapy Research. 2021. https://pubmed.ncbi.nlm.nih.gov/34467577/
- Khan F, et al. Comprehensive review on phytochemicals, pharmacological and clinical potentials of Gymnema sylvestre. Frontiers in Pharmacology. 2019. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6830388/
- Zheng XX, et al. Effects of green tea catechins with or without caffeine on glycemic control in adults: a meta-analysis of randomized controlled trials. American Journal of Clinical Nutrition. 2013. https://pubmed.ncbi.nlm.nih.gov/23426037/
- Yu J, et al. Effects of green tea consumption on glycemic control: a systematic review and meta-analysis of randomized controlled trials. Nutrition & Metabolism. 2020. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7350188/
- National Center for Complementary and Integrative Health. Green tea. https://www.nccih.nih.gov/health/green-tea
- Ngondi JL, Etoundi BC, Nyangono CB, Mbofung CM, Oben JE. IGOB131, a novel seed extract of the West African plant Irvingia gabonensis, significantly reduces body weight and improves metabolic parameters in overweight humans. Lipids in Health and Disease. 2009. https://pubmed.ncbi.nlm.nih.gov/19254366/
- Shin BC, Lee MS, Yang EJ, Lim HS, Ernst E. Maca (L. meyenii) for improving sexual function: a systematic review. BMC Complementary and Alternative Medicine. 2010. https://pubmed.ncbi.nlm.nih.gov/20691074/
- A grape seed and bilberry extract reduces blood pressure in individuals at risk of developing type 2 diabetes: the PRECISE study, a double-blind placebo-controlled cross-over intervention study. 2023. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10283353/
- Eleutherococcus root: a comprehensive review of its phytochemistry and pharmacological potential in the context of its adaptogenic effect. 2025. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12605232/
- National Center for Complementary and Integrative Health. Astragalus. https://www.nccih.nih.gov/health/astragalus
- Loftus HL, Astell KJ, Mathai ML, Su XQ. Coleus forskohlii extract supplementation in conjunction with a hypocaloric diet reduces the risk factors of metabolic syndrome in overweight and obese subjects: a randomized controlled trial. Nutrients. 2015. https://pubmed.ncbi.nlm.nih.gov/26593941/
- Whiting S, Derbyshire E, Tiwari BK. The effects of capsaicin and capsiate on energy balance: critical review and meta-analyses of studies in humans. Appetite. 2012. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3257466/
- U.S. Government Publishing Office, eCFR. 21 CFR 101.36 — Nutrition labeling of dietary supplements. https://www.ecfr.gov/current/title-21/chapter-I/subchapter-B/part-101/subpart-C/section-101.36
- U.S. Food and Drug Administration. Dietary supplement labeling guide: Chapter IV, nutrition labeling. https://www.fda.gov/food/dietary-supplements-guidance-documents-regulatory-information/dietary-supplement-labeling-guide-chapter-iv-nutrition-labeling
- U.S. Food and Drug Administration. Questions and answers on dietary supplements. https://www.fda.gov/food/information-consumers-using-dietary-supplements/questions-and-answers-dietary-supplements
- National Institute of Diabetes and Digestive and Kidney Diseases. Diabetes Prevention Program (DPP). https://www.niddk.nih.gov/about-niddk/research-areas/diabetes/diabetes-prevention-program-dpp
- National Center for Complementary and Integrative Health. Dietary and herbal supplements. https://www.nccih.nih.gov/health/dietary-and-herbal-supplements
- National Institutes of Health, Office of Dietary Supplements. Dietary supplements: what you need to know. https://ods.od.nih.gov/factsheets/WYNTK-Consumer/