What’s the maximum safe biotin dose from supplements?

It hasn’t been established a maximum safe dose of biotin, neither for dietary supplements, nor foods. We can safely get extremely high intakes. But, it’s important to inform our physician, if we’re taking biotin supplements.

Health benefits of biotin

Biotin is a water-soluble B-vitamin. It’s also known as vitamin-B7.

It’s vital for good health and maintaining a normal body weight, as it plays a key role in the metabolism of fatty acids, glucose, and amino acids.

Moreover, biotin is involved in gene regulation and cell signaling.

Additionally, biotin has gained popularity for its claimed benefits on healthy hair, nail and skin. 

In fact, signs of biotin deficiency include skin rashes, hair loss, and brittle nails. But, more studies are needed to determine whether biotin supplements might improve hair, nail, and skin health. Especially, among healthy individuals.[1,2]

What’s the recommended daily intake?

The recommended daily intake of biotin is 30 mcg for adults. Teenagers require only 25 mcg a day, while children require even lower doses.

Normal concentrations of biotin

In healthy adults, the concentration of biotin is 133–329 pmol/L in serum and 18–127 nmol/24 hours in urine.

What’s the maximum dose of biotin I can safely take a day?

Actually, there isn’t a maximum safe dose of biotin. Even extremely high doses are unlikely to cause any adverse effects.

Several studies have found no adverse effects of 10,000 –50,000 mcg of biotin a day!

Side effects of exceeding the daily upper dose of biotin

Although high biotin intakes aren’t dangerous for health, they may interfere with certain laboratory tests. Hence, biotin supplementation could lead to misdiagnosis of a medical condition and inappropriate patient management.

For instance, high intakes of biotin from supplements may cause false measurements of thyroid hormones, and vitamin D concentrations. Even a single dose of 10,000 mcg may affect a laboratory test within 24 hours of taking the supplement.

Moreover, high biotin intakes from dietary supplements can interact with certain medications.

Therefore, it’s important to inform your physician if you’re taking biotin supplements.

Do supplements exceed the maximum daily safe dose?

Most dietary supplements contain up to 10,000 mcg of biotin per serving. Although this dose is about 33,000% of the recommended daily intake, it’s considered pretty safe.

As a rule of thumb, healthy people won’t benefit from extremely high doses. Thus, you better prefer supplements with a low dose per serving.

You’ll find a wide variety of biotin supplements on Amazon.

Certainly, you should consult your healthcare provider first.

Do I need dietary supplements with biotin?

It’s estimated that people in developed countries consume about 35-70 mcg of biotin a day. Thus, healthy people who follow a well-balanced diet get enough biotin from food. They don’t need dietary supplements.

If you experience hair loss or brittle nails, you may benefit from biotin supplements or eating more foods high in biotin, though.

Certainly, you can’t possibly reach toxic levels of biotin from your diet.

Beef liver is among the richest foods in biotin, containing 100% of the recommended daily intake per serving. But, you better avoid eating beef liver regularly, due to its extremely high amounts of vitamin A, which may cause toxicity.

Eggs are the second-richest food in biotin. An egg provides about 30% of the required intake.

Salmon, peanuts, sunflower seeds, and almonds are also great dietary sources of biotin.