Metabo Drops Side Effects: What to Know Before You Use It
No safety studies of the finished Metabo Drops formula were found. This page covers what is known about the ingredients, who should ask a professional first, and what to watch for.
Metabo Drops side effects: what to know
Searching for "Metabo Drops side effects reviews" turns up pages that list generic complaints with no source. We have not seen a verified report of a specific reaction to this product, and we have not seen proof that none occur. Both are true at once, and you should keep both in mind. Whether any ingredient is a concern for you depends on the amount in the product, which is not displayed in the seller page text we read, and on your health and medicines.
Ingredient-related safety considerations
| Ingredient | Considerations reported for the ingredient | Who should ask first |
|---|---|---|
| Green tea extract | Nausea, constipation, abdominal discomfort and higher blood pressure have been reported with extract supplements; rare liver injury has been reported, mainly with extract tablets and capsules. | People with liver conditions, or who take liver-affecting medicines |
| Chromium | May lower blood sugar with insulin or sulfonylureas; may reduce levothyroxine levels; may affect iron absorption. | People with diabetes, thyroid conditions or iron deficiency |
| L-carnitine | Digestive upset and body odor are reported in some people; interactions with some medicines are described by NIH. | People on blood thinners or with kidney or thyroid conditions |
| L-theanine and caffeine | Caffeine can cause jitteriness, sleep problems, a faster heartbeat and stomach upset in sensitive people. | People sensitive to caffeine, with heart rhythm problems, or pregnant |
| Vitamin complex | Depends on which vitamins and how much; unknown from the text we reviewed. | People already taking multivitamins or high-dose supplements |
Green tea extract and liver safety
NCCIH states that liver injury from green tea is uncommon but has been reported, mainly with green tea extract supplements in tablet or capsule form, and that people with a particular immune-related gene variant may be more susceptible. Drinking green tea as a beverage has not raised the same concern. A drop in coffee is neither, and we do not know the concentration. The practical conclusion is not alarm, but awareness: if you have liver disease, drink alcohol heavily or take medicines that affect the liver, ask before you use any green tea extract product.
Chromium and medication interactions
Chromium can enhance the blood-sugar-lowering effect of insulin and sulfonylurea drugs, according to the MSD Manual, and may reduce levothyroxine levels, so thyroid replacement doses may need adjusting. If you take either type of medicine, do not start a chromium-containing supplement without telling the prescriber, because a change in blood sugar or thyroid control may need monitoring.
L-carnitine considerations
Common reports with carnitine supplements include nausea, stomach cramps and diarrhea, and some people notice a fishy body odor. The NIH Office of Dietary Supplements fact sheet is the right source for interaction information, and it is worth reading if you take warfarin or similar medicine. People with kidney disease should ask a doctor before taking carnitine.
L-theanine and caffeine
L-theanine is generally discussed as a calming amino acid and has been studied alongside caffeine. The FDA says about 400 mg of caffeine a day is not generally associated with negative effects for most adults, with wide individual differences, and a cup of coffee can supply anywhere from a small to a large share of that. Because green tea ingredients may add caffeine, and the amount is not stated in the text we saw, count the whole day's intake and listen to your body.
- If you are pregnant or nursing, caffeine limits are lower; follow your obstetrician's advice.
- If you take stimulant medicines or have anxiety, palpitations or sleep trouble, ask before adding more.
Who should speak with a healthcare professional?
- Pregnant or nursing people, and anyone under 18.
- Anyone taking prescription medicine, especially for diabetes, thyroid, blood clotting, blood pressure or mood.
- People with liver, kidney, heart or blood-sugar conditions.
- People sensitive to caffeine.
- Anyone with a history of disordered eating.
- Anyone due for surgery, since some supplements affect bleeding and blood sugar.
Possible warning signs
These signs can have many causes, and they are not a diagnosis. If you notice them while using any supplement, stop using it and contact a healthcare professional:
- Rash, hives, or swelling of the face, lips or throat, or trouble breathing. These need emergency care.
- Yellowing of the skin or eyes, dark urine, severe abdominal pain or unusual fatigue, which can be signs of a liver problem.
- Racing or irregular heartbeat, chest discomfort, severe jitteriness or insomnia.
- Shakiness, sweating, confusion or dizziness in someone taking diabetes medicine, which can indicate low blood sugar.
- Persistent nausea, vomiting or diarrhea.
In the US you can report a suspected adverse reaction to the FDA through its MedWatch program, which helps regulators spot patterns.
If you decide to try it: ways to lower avoidable risk
- Read the Supplement Facts panel first and compare it with every other supplement you take, so you do not double up on caffeine, green tea extract, chromium or vitamins.
- Tell your pharmacist or doctor about it before the first use if you take any prescription medicine.
- Keep to the label's serving. More is not safer.
- Note how you feel in the first days, including sleep, heartbeat, digestion and, if you test it, blood sugar.
- Stop and seek advice if something seems wrong, and keep the bottle and receipt in case you need to report it.
Alcohol, other stimulants, energy drinks and unrelated "fat burner" products add to the load on the liver and the heart, and the combination has not been studied with this product. If surgery is planned, tell the surgical team about every supplement, since some affect bleeding and blood sugar.
What does the product label say?
We have not seen the label, and the seller page text we reviewed did not include its warnings. Read the label for the serving size, the Supplement Facts amounts, the "other ingredients" list, allergen statements and any stated warnings. Photograph it and take it to a pharmacist if you take other medicines. Because the label is the legal document for the product you hold, it outranks anything on a web page, including this one.
Confirm price, shipping and refund terms at checkout.
Frequently asked questions
No product-specific side-effect data was found. Ingredient-level concerns include stomach upset, caffeine effects, rare liver injury with concentrated green tea extracts, and interactions of chromium with diabetes and thyroid medicines.
We cannot say it is safe for everyone, and we do not make that claim. Safety depends on the amounts in the product, your health and your medicines. Ask a healthcare professional.
Only after asking your doctor or pharmacist. Chromium and carnitine can interact with some prescription medicines, and caffeine interacts with many.
Caffeine from your coffee, and from green tea ingredients if present, can. Sensitivity varies from person to person.
We found no verified complaint records for the product. Generic claims on promotional pages are not evidence either way. See our consumer reports and complaints page.
Ask your obstetrician or other clinician first. Caffeine and several supplement ingredients are often limited in pregnancy.
For the ingredients themselves, see the ingredient guide. For our overall view, see the Metabo Drops review, or go back to the homepage.
Sources
- National Center for Complementary and Integrative Health. Green Tea. nccih.nih.gov
- Merck Manual Professional Edition. Chromium. msdmanuals.com
- NIH Office of Dietary Supplements. Chromium: Fact Sheet for Health Professionals. ods.od.nih.gov
- NIH Office of Dietary Supplements. Carnitine: Fact Sheet for Health Professionals. ods.od.nih.gov
- U.S. Food and Drug Administration. Spilling the Beans: How Much Caffeine Is Too Much? fda.gov
- Haskell CF, et al. The effects of L-theanine, caffeine and their combination on cognition and mood. Biol Psychol. 2008;77(2):113-122. PubMed
- U.S. Food and Drug Administration. MedWatch: FDA Safety Information and Adverse Event Reporting Program. fda.gov
- U.S. Food and Drug Administration. Dietary Supplements. fda.gov
How we separate seller claims from facts: see our review methodology.