Is 5,000 mcg of biotin too much

There is no established upper limit or toxic level for biotin. Since biotin is a water-soluble vitamin, any excess amount will leave the body through your urine.

Studies show that up to 10–50 mg of biotin in healthy adults—more than 1,000 times the recommended amount—does not lead to side effects or symptoms of toxicity.

Is 10,000 mcg of biotin too much

Despite the lack of known harm at high doses, you should still only aim to get recommended amounts unless otherwise directed by your healthcare provider.

Biotin supplementation can be a concern, however, for people who are getting laboratory tests done.

Taking supplements that contain biotin above recommended amounts can interfere with certain lab test results and lead to false readings. Inaccurate test results can lead to unnecessary or incorrect medical care. The FDA recommends that patients and healthcare providers review and discuss the supplements the patient is taking and in what doses.