Is Diabec Legit? Ingredients, Side Effects, Where It's Made and What Customers Say

If you are thinking about buying a supplement online, it makes sense to ask whether the seller is real. Many people search "is Diabec legit" before they order. That is a fair question and it deserves a plain answer.

This page puts the answers in one place. It covers who sells Diabec, where it is made, what is in it, what the research says about side effects, and how refunds and contact work. The company and research claims link to a source you can open and read. We do not ask you to take our word for anything.

Whether a company is legitimate is a question about the business. It is not a question about what a product does in your body. This page answers the first question and is clear about the limits of the second. This guide is general education. If you use insulin or other glucose medicines, follow the plan your diabetes team gave you.

Is Diabec a legitimate company?

Yes. Diabec is a trading name of NIBARTECH LTD. It is a private limited company incorporated in England and Wales on 14 November 2023, company number 15283998. Its status on the UK government register is Active. You can look it up yourself on Companies House.^[1]

The register lists the company under SIC code 47910, which covers retail sale by mail order or over the internet. That matches what the company does. It sells online and ships to customers.^[1]

The company also holds a data protection registration with the UK Information Commissioner's Office, number ZC180793.^[6] This is listed in the privacy policy.^[4] The terms of service say they are governed by the law of England and Wales. Both the terms and the refund policy name NIBARTECH LTD as the seller.^[4]

None of this tells you how the product will suit you. It does tell you there is a real, registered business behind the website, with a public address and published policies.

What you can check.	Where.
Company registration, status and filings.[1]	Companies House, 15283998.[1]
Data protection registration ZC180793.[6]	Privacy policy and ICO register.[4][6]
Refund terms.[4]	Refund policy.[4]
Customer reviews.[5]	Trustpilot profile.[5]
Address, email and phone.[1][4]	Contact page.[4]

Who sells Diabec and where is it made?

Diabec is sold by NIBARTECH LTD, whose registered office is First Floor Office, 3 Hornton Place, London W8 4LZ. The same address appears on the contact page and on Companies House.^[1][4]

The ingredients are sourced and powdered in India. They are then put into capsules and bottled close to the source. This is stated in the FAQ on the product page.^[2]

What is in Diabec?

Each bottle holds 180 capsules. The formula uses six herbs that have a long history in Ayurvedic practice:^[2]

• Bitter melon (Momordica charantia)
• Gymnema (Gymnema sylvestre)
• Fenugreek (Trigonella foenum-graecum)
• Jamun (Syzygium cumini)
• Neem (Azadirachta indica)
• Enicostemma littorale

For how many capsules to take and when, follow the directions on the label. If you are unsure, ask your pharmacist to look at the label with you.

Does Diabec have side effects?

Herbs are active plants, so they can cause side effects. Below is what the research says about the herbs in Diabec. We have kept to what the studies actually report and said so where the evidence is thin.

Ask your doctor or pharmacist before you take any of these herbs. Under each one we note only what is specific to it.

Bitter melon

A review of bitter melon reported hypoglycaemic coma and convulsions in children and a favism-like reaction among its adverse effects. It also noted reports of bitter melon interacting with medicines taken for diabetes.^[7] In pregnant rats, a water extract of the unripe fruit was linked to more litters with birth defects. The authors advised caution in people.^[8]

Diabec does not recommend bitter melon in pregnancy. Favism is the reaction seen in people with G6PD deficiency, so anyone with that condition should ask their doctor before taking bitter melon.

Gymnema

A review of past studies looked at the side effects and drug interactions of gymnema.^[9] In a randomized study of 50 people, the most common side effects were stomach and gut upsets, which eased in the first month.^[10] So some people may notice mild digestive upset at first. Ask your doctor before use if you take any medicine for diabetes.

Fenugreek

Fenugreek belongs to the same plant family as peanuts and chickpeas. A toxicology review says people with peanut or chickpea allergy should avoid it because the allergy may carry over. The same review says it is not recommended in pregnancy.^[11] If either applies to you, ask your doctor before use.

Neem

In diabetic pregnant rats, neem seed oil and one of its compounds slowed the growth of the young in the womb.^[12] Purified neem extracts ended early pregnancy in rats and monkeys in another study.^[13]

Neem is not recommended in pregnancy. We found no safety data on neem during breastfeeding, so it is not recommended then either. If you are pregnant or breastfeeding, ask your doctor before use.

Jamun

A 2026 review of trials on jamun and related plants found the studies were short and of low certainty. It found that the evidence did not support conclusions on long-term safety, and it did not address use in pregnancy.^[14] A rat study noted that jamun seed preparations are used in pregnancy, but no one had studied how they affect the baby. In that study a seed extract upset the mother's thyroid hormones, but litter size and pup weight were not affected.^[15] Data on jamun in pregnancy is limited, so ask your doctor before use.

Enicostemma littorale

Enicostemma littorale (chota chirayata or mamejavo) is a bitter herb used in India. Most of the research on it is in animals. In rats, no changes in toxicity markers were reported at the dose studied,^[16] and one three month study of 84 people with type 2 diabetes did not report on side effects.^[17] There is little or no published data on drug interactions, pregnancy or breastfeeding. Speak to your doctor or pharmacist before use.

Can I take Diabec with metformin or other medication?

Ask your doctor or pharmacist first. This matters most if you take any medicine for diabetes. A review looked at natural health 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 blood glucose dropping too low. It said pharmacists should know when patients use them so they can avoid interactions.^[3] Speak to your doctor or pharmacist before use, especially if you take medication, are pregnant or breastfeeding, or have a medical condition.

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.^[18][19] Our guide to low blood sugar covers the warning signs.

In the UK, the NHS says to call 999 if you think someone has very low blood sugar and they are not responding normally or are unconscious, and a glucagon injection is not available or you do not know how to use it, or they have had a glucagon injection and have not recovered within 10 minutes, or they have been drinking alcohol.^[18] 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.^[19]

Blood thinners need care too. In one case report a person taking warfarin had a raised clotting test (INR) while also taking fenugreek with another herb. It settled when the herbs were stopped and came back when they were restarted.^[20] It is a single case, but it is a reason to check first.

Four steps to take before you start:

1. Take the full ingredient list to your doctor or pharmacist before you order.^[2][3]
2. Ask whether any of the six herbs interact with your diabetes medicines, blood thinners or other prescriptions.^[3][20]
3. Ask whether you should check your blood glucose or clotting tests (INR) more often if your clinician approves use.^[3][18][20]
4. Never stop or change a prescribed medicine on your own. If you take metformin, our article on metformin side effects covers that topic in more depth.^[3][18]

Where can I read Diabec reviews?

At the time of writing (25 October 2026) Diabec held a TrustScore of 4.7 out of 5 on Trustpilot, from 249 reviews. The live score and all the reviews are on the Diabec Trustpilot profile, where you can read them yourself.^[5]

We do not quote reviews on this page. Reviews describe one person's experience. They are no substitute for advice from your doctor. Reading the full set on an independent site gives you a fairer picture than a few lines chosen by the seller.

Is Diabec sold on Amazon?

Diabec has no Amazon listing. It is sold at dia-bec.com.^[2]

A different product called "Diabec Capsules" is listed on Amazon by another seller. It is not made or sold by NIBARTECH LTD and its formula is not the same: it lists amla and haldi (turmeric), which are not in Diabec. The six herbs in Diabec are listed above.

What is the Diabec refund policy?

The policy is called the "30-Day Refund Promise". You have 30 days from the date the carrier confirms delivery. It applies to your first order only and to one unit per product variant. Returned items must be sealed and unused. The full terms are on the refund policy page, last updated 13 October 2026.^[4]

If your order had free shipping, Diabec deducts the shipping cost it paid. You pay for the return shipping and need to send a tracking number. Diabec answers a refund request within 5 business days and an approved refund reaches your card within 5 to 10 business days.

Customers in the UK and EU also have the statutory right to cancel within 14 days of the day they receive the goods. The refund is then due within 14 days of the seller receiving the goods back, or of you sending proof of return, whichever comes first. That right applies to every order, not only the first, and sits alongside the company policy. Units whose seal has been broken are excluded, as the law allows for sealed health products.

How do I contact Diabec?

You can email contact@dia-bec.com or call the UK number +44 20 7167 9176. The phone line is open 24/7 and an AI assistant answers. Human staff reply Monday to Friday within one business day.^[4]

The postal address is First Floor Office, 3 Hornton Place, London W8 4LZ. All contact options are on the contact page.

Questions to ask your doctor or pharmacist

• "Can I take a supplement containing bitter melon, gymnema, fenugreek, jamun, neem and Enicostemma littorale alongside my current medicines?"^[2][3]
• "Could any of these herbs increase my risk of low blood sugar with my insulin or diabetes tablets?"^[3][18][19]
• "Do any of these herbs interact with blood thinners such as warfarin?"^[20]
• "Is there any reason with my medical history or my G6PD status to avoid these herbs?"^[7]
• "Should my kidney or liver function be checked before or while I take them?"^[3][11]

Frequently asked questions

Is Diabec a real company?

Yes. It is a trading name of NIBARTECH LTD, company number 15283998, listed as active on Companies House.^[1]

Is Diabec a medicine?

No. Diabec is a food supplement made with six Ayurvedic herbs. It is not a medicine, it does not treat or prevent diabetes, and it does not replace anything your doctor prescribes.^[2]

Where are the ingredients from?

They are sourced and powdered in India, then put into capsules and bottled close to the source.^[2]

How many capsules are in a bottle?

There are 180 capsules per bottle. Follow the directions on the label.^[2]

Can I take it while pregnant or breastfeeding?

Several of the herbs are not recommended in pregnancy, based on animal studies and a toxicology review.^{[8][11][12][13]} We found little or no published safety data on breastfeeding for these herbs. Speak to your doctor or pharmacist before use, especially if you take medication, are pregnant or breastfeeding, or have a medical condition.^[3]

Can I buy Diabec on Amazon?

Diabec has no Amazon listing. It is sold at dia-bec.com.^[2] A product called "Diabec Capsules" on Amazon comes from another seller and is not Diabec.

Can I get a refund?

On a first order you can return one sealed, unused unit within 30 days of delivery under the 30-Day Refund Promise. UK and EU customers can also cancel any order within 14 days of receiving it. See the refund policy for the full terms.^[4]

How fast is delivery to the UK?

Orders are dispatched in 2 to 4 working days and most UK orders arrive within 5 to 11 working days after that. These are estimates based on recent deliveries, not fixed dates. See the shipping policy for current times by country.^[4]

Where to go next

If you want to check the details yourself before deciding, these are the three pages to read:

• The six ingredients, one page per herb with the published research.
• The refund policy, including the 30-Day Refund Promise and the 14-day cancellation right.
• The product page, with the label, the serving directions and current pricing.

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.