Gymnema
Gymnema for Blood Sugar: The Gymnema Sylvestre Leaf in Sugar Defender
Gymnema for blood sugar has small, early evidence: a 2021 review of 10 small studies found a slight fasting-glucose drop at 200-400 mg a day of extract. In Sugar Defender, gymnema sylvestre leaf extract is 8th of 22 in a 200 mg blend, so one 1 mL serving holds at most 25 mg and likely closer to 9 mg.
Written by the Sugar Defender label deskUpdated
The plant01
What is gymnema sylvestre?
Gymnema sylvestre is a woody climbing plant from India and Africa whose leaves are used in Ayurvedic practice. In Hindi it is called gurmar, often translated as "sugar destroyer".
The name comes from its odd effect on the tongue: chewing the leaf makes sweet foods taste flat for a while.
Sugar Defender lists it as "Gymnema Sylvestre Leaf Extract", the 8th of 22 ingredients in its blend. That is the leaf, the same part most trials used. No extract strength is printed, and no gymnema weight either.
The gymnema photo shows a living plant from the brand's image set. The bottle holds a liquid extract, not leaves.
| Name on the label | Gymnema Sylvestre Leaf Extract |
|---|---|
| What it is | Gymnema sylvestre leaf |
| Place on the label | 8 of 22 in the 200 mg proprietary blend |
| Amount per mL (1 dropper) | Not listed; #8 of 22 in the 200 mg blend, so at most 25 mg per mL |
| Amount used in research | 200-400 mg a day of extract |
| Strength of evidence | Small trials; small effect |
| Marketed or traditional use | Ayurvedic leaf known as gurmar |
| Main caution | May add to diabetes medicines; dulls sweet taste. |
Active compounds02
What are gymnemic acids?
Gymnemic acids are the group of compounds in the leaf that researchers treat as its active part. Trials usually used extracts standardized to 25% gymnemic acids (Drugs.com, Gymnema monograph).
Standardization tells you how much of the active part an extract holds. A 200 mg capsule at 25% carries about 50 mg of gymnemic acids.
The Sugar Defender label gives neither the gymnema weight nor a percentage. So even a known milligram figure would not tell you the gymnemic acid content.
Evidence03
What does research say about gymnema for blood sugar?
Research on gymnema for blood sugar is small and early. A 2021 meta-analysis of 10 small studies found a fasting-glucose drop that was statistically real but clinically small (Drugs.com, Gymnema monograph).
The same monograph notes that robust clinical trials are still lacking. Most studies were short, small and in people who already had diabetes.
That fits the wider picture. NCCIH finds no reliable evidence that any herbal supplement can help control diabetes (NCCIH, Diabetes and Dietary Supplements).
- Studied form: standardized leaf extract, taken alone
- Studied amount: 200-400 mg a day of that extract
- Finding: a small fasting drop, with no product-level trial of Sugar Defender
Dose math04
How much gymnema is in one dropper of Sugar Defender?
At most 25 mg per mL, because gymnema is 8th in a 200 mg blend. An even split would come to about 9 mg.
Studies used 200 to 400 mg a day of standardized extract, and some used 500 to 1,000 mg of leaf extract (Drugs.com, Gymnema monograph). So the gymnema dosage in one dropper is a small fraction of either.
Put another way: even at the ceiling, matching the low end of the trials would take 8 mL a day. At an even split it would take about 22 mL. The label says 1 mL.
| Amount | Gymnema per day | Share of 200 mg |
|---|---|---|
| 1 mL, even split of the blend | About 9 mg | About 4.5% |
| 1 mL, most its place allows | 25 mg | 12.5% |
| Standardized extract in trials | 200-400 mg | 100-200% |
| Plain leaf extract in other trials | 500-1,000 mg | 250-500% |
Sweet taste05
Why does gymnema make sweet things taste bland?
Gymnema's best-known effect is reduced sweet taste (Drugs.com, Gymnema monograph). The leaf's compounds are thought to sit on the tongue's sweet receptors for a while.
The effect wears off, and salty, sour and bitter tastes stay the same.
The drops are sweetened with stevia and xylitol. We cannot tell whether the small amount of gymnema in 1 mL dulls that sweetness, since the dose is unknown and we ran no taste test.
Sugar Defender: from $49 a bottle60 mL · 2, 3 or 6 bottles · free US shipping on 3 or 6 · 60-day money-back guarantee
See packsCautions06
Is gymnema safe to take with diabetes medicines?
Ask your doctor first. The ADA warns that some supplements, combined with diabetes medicines, can cause low blood glucose (ADA, Vitamins & Supplements).
That matters most on insulin or a sulfonylurea. A low often means a reading under 70 mg/dL, with shakiness, hunger or a fast heartbeat (NIDDK, Low Blood Glucose).
A reversible liver-injury case report has also been linked to gymnema (Drugs.com, Gymnema monograph). Stop and call a doctor if you notice dark urine or yellowing skin.
Never skip or lower a diabetes medicine because a supplement contains gymnema. Bring the label to your next visit.
Claims07
Which gymnema sylvestre benefits hold up?
Only two gymnema sylvestre benefits have human data: duller sweet taste and a small fasting-glucose drop in small trials (Drugs.com, Gymnema monograph).
The sales page says gymnema "Supports Healthy Heart & Blood Sugar". We found no heart outcome trials in the sources we used.
Sweet taste
Reduced sweetness is its most reliable effect.
Fasting glucose
A slight drop at 200-400 mg in small studies.
Heart health
No outcome trials in our sources.
In these drops
No study has tested gymnema in Sugar Defender.
The full claim review sits on Sugar Defender benefits, checked.
More ingredients08
How does gymnema compare with the other ingredients?
Gymnema has more blood sugar research than most of the blend, though chromium has more trials behind it. In Sugar Defender its dose is unknown and likely small.
Chromium is the only printed amount: see chromium picolinate. Every line is compared on the full ingredients list, and bottle prices are on pricing.
FAQ09
Gymnema questions, answered
Does gymnema stop sugar cravings?
It dulls sweet taste for a while, which is its best-known effect (Drugs.com, Gymnema monograph). Whether that leads people to eat less sugar has not been shown in strong trials. A single dropper of Sugar Defender holds an unknown, likely small, amount of gymnema.
How long does gymnema block sweet taste?
The effect is temporary and fades on its own. We found no reliable figure for how long it lasts at a dose as small as the one in 1 mL of Sugar Defender. Other tastes, such as salty and sour, are not affected.
What gymnema dosage did studies use?
Most trials used 200 to 400 mg a day of extract standardized to 25% gymnemic acids. Others used 500 to 1,000 mg of leaf extract (Drugs.com, Gymnema monograph). Ask your doctor before trying any dose, especially if you take diabetes medicine.
Can gymnema cause low blood sugar?
It may, mainly in people on insulin or a sulfonylurea, because some supplements can add to those drugs (ADA, Vitamins & Supplements). Know the signs, such as shakiness, sweating and confusion, and keep 15-20 grams of fast carbs on hand (NIDDK, Low Blood Glucose).
Is gymnema bad for the liver?
Liver harm looks rare, but a reversible liver-injury case report exists (Drugs.com, Gymnema monograph). Stop any gymnema product and call your doctor if you notice dark urine, yellow skin or eyes, or pain under the right ribs.
What does gurmar mean?
Gurmar is the Hindi name for gymnema sylvestre, usually translated as "sugar destroyer". It refers to the leaf's effect on sweet taste, not to any proven effect on blood sugar levels.
Who wrote this10
Written and reviewed by
Pages built from the label, the sales page and linked NIH, FDA, CDC, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is run by Isugardefender, a Sugar Defender U.S. shop, not by the manufacturer or the distributor. We earn money when you buy through our order links.
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