Can you take too much biotin?

Author: Yasmin Heller  |  Last update: Wednesday, May 28, 2025

There is no specific antidote for overdosing on biotin. Excess in the body is rare, and since biotin is a water-soluble vitamin, it is excreted in the urine when in excess. Signs and symptoms of biotin overdose may include and are not limited to insomnia, excessive thirst, and urination.

Is 10000 mcg of biotin daily too much?

According to the Mayo Clinic, “no side effects have been reported for biotin in amounts up to 10 mg (10,000 mcg) per day.” Even so, numerous websites claim that too much biotin can weaken the immune system, impact the neurological system, contribute to high blood glucose levels, and cause digestion problems or skin ...

Will too much biotin cause hair loss?

Biotin is often promoted as a supplement that supports healthy hair growth, but there is some confusion about whether it can actually cause hair loss. In general, biotin itself does not directly lead to hair loss, but there are situations where it might appear to contribute to the problem.

How much biotin to take daily for hair growth?

In our search, we found 18 reports in the literature that showed improvement of hair and nail growth on supplementation in patients with established biotin deficiency. For patients with inherited enzyme deficiency, larger doses of biotin supplementation are recommended (from 10,000 to 30,000 μg/day).

Is biotin hard on your liver?

Dietary Biotin Supplementation Modifies Hepatic Morphology without Changes in Liver Toxicity Markers.

Preventing Balding: What I Did Before It Was Too Late.

What is the downside of taking biotin?

Biotin use has caused the misdiagnosis of hyperthyroidism and Graves' disease, a serious autoimmune thyroid disease. 8 This is due to biotin's impact on thyroid lab work. Check with your healthcare provider before starting a supplement regimen. They may suggest that you stop taking biotin before getting your labs done.

Can biotin cause weight gain?

There is no scientific evidence that collagen or biotin causes weight gain. There are many myths about collagen and biotin on forums, social media sites, and blogs. Some people claim these substances promote weight gain. There is no evidence to support this.

Who should not take biotin?

If you have any medical conditions -- or are pregnant or breastfeeding -- check with a doctor before using biotin supplements. Don't give biotin to a child unless a pediatrician recommends it. Interactions. If you take any drugs regularly, talk to your doctor before you start using biotin supplements.

When to take biotin, morning or night?

The most commonly recommended time slot to consume biotin supplements is with your morning meal. The water-soluble nature of biotin will ensure that your body is absorbing it with the other nutrients in your meal.

Does biotin increase facial hair in females?

Many women report increased hair growth after taking biotin supplements, including facial hair. These testimonials are anecdotal and vary widely. Some women notice a significant increase in facial hair, while others see no change at all.

Can biotin affect the heart?

Yes, taking supplements that contain high levels of biotin (vitamin B7) can lead to falsely low or falsely high results on a troponin test. Troponin, a protein found in heart muscle, is released into the bloodstream during a heart attack. Measuring blood troponin levels is the standard way to diagnose a heart attack.

What is the best vitamin for hair growth?

Key Vitamins for Hair Growth
  • Biotin. Biotin is a critical vitamin for healthy hair growth, and deficiency will lead to thinning hair. ...
  • Vitamin D. ...
  • Vitamin A. ...
  • Vitamin C. ...
  • Vitamin E. ...
  • Folic Acid. ...
  • Iron. ...
  • Magnesium.

Is biotin safe for the kidneys?

There is no evidence that taking biotin causes kidney stones or leads to chronic kidney disease. However, high doses of biotin can produce false results for certain lab tests, including those for thyroid function and for hormone levels. Consult your doctor when you're considering taking biotin or any supplement.

Which food has the highest biotin?

Many foods contain some biotin. Foods that contain the most biotin include organ meats, eggs, fish, meat, seeds, nuts, and certain vegetables (such as sweet potatoes) [2,12].

Does biotin affect sleep?

Excess in the body is rare, and since biotin is a water-soluble vitamin, it is excreted in the urine when in excess. Signs and symptoms of biotin overdose may include and are not limited to insomnia, excessive thirst, and urination.

What are the side effects of biotin?

Although rare, biotin may cause these side effects:
  • Allergic reaction (typically resulting in skin rashes)
  • Nausea.
  • Cramping and abdominal pain.

Can I take biotin and vitamin D together?

Vitamin D and biotin work well together and they can give better results when combined together. One way to use biotin and vitamin D is to have them as supplements if there is a dietary deficiency. Or they can be used along with other medications and therapies to give an overall improvement to the hair.

What vitamins not to take at night?

6 supplements you should not take at night!
  • Vitamins B.
  • Multivitamins and energy herbs.
  • Vitamin D.
  • Calcium.
  • Vitamin C.
  • Zinc.

What supplement should not be taken together?

7 Supplement Combos You Should Never Take Together, According to Dietitians
  • Zinc & Calcium.
  • Iron & Zinc.
  • Iron & Calcium.
  • Magnesium & Zinc.
  • St. John's Wort & Serotonin Supplements.
  • Ginkgo Biloba & Fish Oil.
  • St. John's Wort & Ginseng.
  • Things to Consider.

Can biotin regrow hair?

A biotin deficiency may lead to hair loss, and supplements may aid hair growth. However, evidence has not shown that biotin supplements can boost hair growth in those without a deficiency. Biotin is an essential B vitamin that helps the body get energy and nutrients from carbohydrates, proteins, and fats.

Does biotin help with belly fat?

Most studies have found no definite link between biotin and weight management.

Does biotin cause facial hair growth?

Despite the popularity of biotin as a hair growth supplement, there's no evidence that it specifically promotes the growth of facial hair. Most studies that support biotin's hair growth properties focus on people who are deficient in biotin.

Does biotin affect the thyroid?

Further, some skin doctors also recommend biotin for these issues. Biotin has no effect on thyroid hormone levels or thyroid function in the body. However, biotin can interfere with the measurement of hormone levels in the laboratory, making them inaccurate.

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