Can vitamin D-3 make you hyper.....?

Question

I've been taking vitamin D-3 for 2 weeks now. I take 2000 UI a day. I find that I am hyper and I have trouble sleeping. Can this be caused by the vitamin intake or is it just a coincidence?

Answer 1

Best Answer - Chosen by Asker

Normal D-3 supplements shouldn't cause insomnia, but a lack of vitamin D will cause sleep disturbances.

An overdose of D-3 tends to cause fatigue, not hyperactivity.



If you are vitamin deficient, taking supplements can boost your energy level, but the only one that causes obvious hyperactivity and sleep loss (that I'm familiar with), is niacin, otherwise known as B3. It can cause tingling, and flushing (hot flashes). I can't take niacin, and must take niacinamide instead, as normal niacin makes me feel like I'm on speed.

Asker's Rating:

Asker's Comment:

Thank you Suzi, I think I'll stay away from the niacin too:) I am vitamin deficient. Didn't take any and started with the D-3. I think I'll cut down to 1 instead of 2.Tx:)

Answer 2

Unless the hyperness and trouble sleeping are due to anxiety, it's not the vitamin D. 2000 IU shouldn't have adverse effects anyway.

Answer 3

Excessive vitamin D3 can cause hypercalcemia. But I doubt that it causes any sleep disturbance.

Answer 4

I would think it's just a coincidence.
You may wish to go "decaf" and see if that might help.

Answer 5

It is a coincidence.

Overdose of vitamin D (calcidiol) can cause nervousness but you would need to be taking either a very high dose such as 10,000 IU over a long period of time or a single massive dose. I have read of desperately hungry Arctic explorers dying from overdose, the result of eating polar bear liver which contains a huge amount.

A 2000 IU dose is moderate and should not cause any problem. Instead, it should be highly beneficial helping to mineralize your bones and with immune function.

I think you should continue to take it. If you are outside a lot in the warmer months with much of your skin exposed you could take a vitamin D hiatus then. Your skin manufactures vitamin D in response to sunlight.