Biotin and dosage

https://medlineplus.gov/druginfo/natural/313.html

Biotin
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What is it?

What is it? has been expanded.
Biotin is a vitamin that is found in small amounts in numerous foods.

Biotin is used for preventing and treating biotin deficiency associated with pregnancy, long-term tube feeding, malnutrition, and rapid weight loss.

It is also used orally for
1. hair loss,
2. brittle nails,
3. skin rash in infants (seborrheic dermatitis),
4. diabetes,
5. mild depression.

What dose is used?
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The appropriate dose of biotin depends on several factors such as the user’s age, health, and several other conditions.

At this time there is not enough scientific information to determine an appropriate range of doses for biotin.

Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.

There is no recommended dietary allowance (RDA) established for biotin.

The adequate intakes (AI) for biotin are

7 mcg for infants 0-12 months,

8 mcg for children 1-3 years,

12 mcg for children 4-8 years,

20 mcg for children 9-13 years,

25 mcg for adolescents 14-18 years,

30 mcg for adults over 18 years and pregnant women,

and 35 mcg for breast-feeding women.