just wondering


Biologist & Ecologist
If it's D3 produced naturally in the skin when exposed to a UVB light or outside in the sunshine, no, because they can regulate how much they make. But if it's dietary D3 supplement, then yes. Too much can interfere with calcium absorbtion and end up causing similar results as metabolic bone disease.

Too much of it will start affecting the nerves and muscles, and more severe toxicity will start to affect calcium levels; calcium will be highly elevated in soft tissues, such as muscles and kidneys, and begin to actually calcify these tissues, while debilitating the bones.

You can read more about the different common minerals and vitamins and what they do here: Chameleon Physiology & Supplements

This is why we want to provide plain calcium supplement more regularly and rely mostly on a good UVB bulb to provide D3. And then use the D3 powder supplement as just that, a supplement to fill in any gaps. But we don't want to rely on it too heavily.


New Member
Yes it is. Too much D3 can have the same effects as too little D3 and eventually kill them.

Only use a vitamin D3 supplement twice a month.
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