Vitamin Supplements — Problem for My Hair?

Hello – I recently added some new supplements to my daily routine and wanted to know if any them or the amounts could be potentially damaging to hair?

1. vitamin b6 – 200mg – is this excessive? I have read that a lot of b6 could potentially stimulate hair growth in men. Have you heard of this?
2. vitamin d – 2400IU – again, I feel that this is a necessary vitamin that is often overlooked. But how much is too much?
3. magnesium – 900mg

Vitamin B6 — Recommended dosage is between 1.3mg-2mg daily, depending on age and sex; Maximum dosage is 100mg… so you’re taking double the maximum. (source)

Vitamin D — Recommended dosage is around 200 UI, though it varies depending on age. The upper limit is 2000 IU. Again, you’re taking more than the maximum recommended. (source)

Magnesium — Recommended dosage is between 300-400mg, depending on age, weight, and sex. (source)

Now I do realize that when taking supplements the Recommended Daily Allowances (RDA, also known as DRI) are many times thrown out the window, but you should talk to a doctor about the potential side effects of taking too much of any particular vitamin. I’ve read that excessive about of vitamin B6 or vitamin D can help with hair loss, but that’s not been proven (and keep in mind it’s just what I’ve read online, not in a medical journal). Magnesium can help with healthy hair growth, but generally it is deficiencies in these vitamins that can cause problems. I’ve never told a patient to take excessive amounts to help their hair, though. I can’t find any information that shows potential damage to hair, but again, you should consult with your physician about taking so much of these supplements on a daily basis.