Diabec Ingredients: The Six Herbs, the Evidence and Safety

Diabec ingredients are six herbs with a long history in Ayurvedic practice. So what is Diabec? It is a food supplement, not a medicine, and each bottle holds 180 capsules. The herbs are sourced and powdered in India. Below, each herb is set against what human studies have found and where the evidence is thin.

When we searched PubMed for each of the six herbs, we found pooled human trials for three of them: bitter melon, fenugreek and gymnema. Where a herb has only animal or lab research, we say so and give no figures.

This guide is general education. If you use insulin or other glucose medicines, follow the plan your diabetes team gave you.

What are the Diabec ingredients?

Diabec contains the six herbs below. The part of each plant and the amounts come from the Supplement Facts label. A serving is 2 capsules and a bottle holds 90 servings. For how many capsules to take and when, follow the directions on the label.^[1]

The six herbs add up to 1,000 mg (1 g, or 0.035 oz) per serving. The other ingredients are the capsule shell, made from hydroxypropyl methylcellulose (a plant-based material), and rice flour.^[1]

What does research say about bitter melon?

Bitter melon, also called karela, has been compared with placebo in pooled human trials. A 2019 meta-analysis pooled 10 studies with 1,045 people with type 2 diabetes over 4 to 16 weeks. The authors rated the evidence low to very low quality and said safety data were sparse.^[2]

What does research say about gymnema?

The main summary for gymnema is a 2021 meta-analysis of 10 studies with 419 people with type 2 diabetes. Its main weakness is the design. It compared results after treatment with results at baseline, not with a placebo group, and the studies varied widely.^[5] That makes the true size of any effect hard to judge.

What does research say about fenugreek?

Fenugreek has two meta-analyses that do not fully agree. One said its findings must be read with great caution.^[3] A 2023 analysis of 14 trials with 894 people found no significant change in fasting glucose and raised concerns about study quality.^[4]

The US National Center for Complementary and Integrative Health (NCCIH) warns that large doses of fenugreek may cause a harmful drop in blood sugar. It also says fenugreek above food amounts is not safe in pregnancy.^[11]

What about jamun, neem and Enicostemma littorale?

The human evidence for these three herbs is thin:

• Jamun. In a 28 day double blind trial of 27 people with type 2 diabetes, jamun leaf tea did not change fasting glucose.^[6] Diabec uses the seed, not the leaf, so that trial says nothing either way about the form in Diabec. Traditional use also focuses on the seed, which has mostly been studied in animals and in the lab.
• Neem. We found no human meta-analysis or official health page on neem and glucose. Research so far is mainly lab and animal work, so we give no figures.^[8]
• Enicostemma littorale. It has one three month study of 84 people with type 2 diabetes, published in 2004. The study had no control group, so the result cannot be separated from other changes in care.^[7] That is not enough to draw firm conclusions.

Can these studies tell you whether Diabec works?

No, not directly. Each study tested a single herb at its own dose and preparation, mostly in people with type 2 diabetes. None of them tested Diabec, so their results cannot be applied to it. Combinations are harder to study still. A Cochrane review of Ayurvedic herbal mixtures for diabetes found 7 trials with 354 people and said that, because of weak methods and small numbers, no firm conclusions could be drawn.^[9]

What is not in Diabec?

Cinnamon, berberine and chromium are often sold for blood sugar support. NCCIH says there is weak evidence of a possible benefit for these three.^[12] Diabec does not contain any of them. If you see them mentioned next to Diabec elsewhere, they are not part of this formula.

Is Diabec safe with diabetes medicine?

Ask your doctor or pharmacist first. A 2017 review written for pharmacists covered ten natural products including gymnema, bitter melon and fenugreek. It warned that, taken alongside diabetes medicines such as insulin or a sulfonylurea like gliclazide or glimepiride, these products could add to the effect of the medicines and raise the risk of a low.^[10] Never stop or change a prescribed medicine on your own.

Low blood sugar usually means below 4 mmol/L (72 mg/dL) in the UK or below 70 mg/dL (3.9 mmol/L) in the US.^[13][14] Our guide to low blood sugar covers the warning signs. In the UK, the NHS says to call 999 if someone may have very low blood sugar and is not responding normally or is unconscious, and a glucagon injection is not available or you do not know how to use it, or they have not recovered within 10 minutes of a glucagon injection, or they have been drinking alcohol.^[13] In the US, the ADA says to call 911 right away if someone is unconscious and glucagon is not available or no one knows how to use it.^[14]

Our Is Diabec legit page lists the cautions for each herb, including pregnancy, allergy and blood thinners. If you take metformin, read our guide to metformin side effects.

1. Show the Diabec Supplement Facts label to your doctor or pharmacist before starting.^[1][10]
2. Ask whether any of the six herbs interact with your insulin, gliclazide, metformin or other prescriptions.^[10]
3. Check your blood glucose more often during the first weeks if your clinician approves use.^[10][13]
4. Never stop or change a prescribed medicine on your own.^[12][13]

Questions to ask your diabetes team

• Can I take a supplement with bitter melon, gymnema, fenugreek, jamun, neem and Enicostemma littorale alongside my current medicines?^[1][10]
• Could any of these herbs add to the effect of my insulin or gliclazide and cause a low below 4 mmol/L (72 mg/dL) or 70 mg/dL (3.9 mmol/L)?^[10][13][14]
• Should I check my blood glucose more often if we decide I can try it?^[10][13]
• Is there any reason with my medical history, pregnancy status or kidney and liver function to avoid these herbs?^[8][11][12]

Frequently asked questions

What is Diabec?

Diabec is a food supplement made with six Ayurvedic herbs: bitter melon, gymnema, fenugreek, jamun, neem and Enicostemma littorale. It is not a medicine. Each bottle holds 180 capsules.^[1]

Are Diabec ingredients scientifically studied?

Some more than others. Bitter melon and fenugreek have meta-analyses of human trials, with low quality or mixed evidence. Gymnema, jamun and Enicostemma littorale have small or weak studies. Neem has mainly lab and animal research. None of these studies tested Diabec itself.^{[2][3][4][5][6][7][8][9]}

Does Diabec contain cinnamon or berberine?

No. Diabec does not contain cinnamon, berberine or chromium.^[1][12]

Where are Diabec ingredients from?

The herbs are sourced and powdered in India, then put into capsules and bottled close to the source.^[1]

Where to go next

For more on the Diabec ingredients and their cautions, see:

• Is Diabec legit, for company details, herb cautions and the refund policy.
• Ayurveda and blood sugar, for the wider research on Ayurvedic herbs.
• Ingredients overview, for a short profile of each herb.

Note: If you are pregnant, breastfeeding, or considering giving any supplement or herbal product to a child, consult your healthcare provider before making any changes to your diet, supplement routine, or prescribed medications.