Everyone is different and the only way you would know is to have your 25-hydroxy vitamin D level checked. Sunshine is a good alternative. I take a lot less D3 in the summer...but still some as I work inside.
A perfect exposure to summertime sun results in a maximum 10,000iu's before the body shuts off production. Up to you to determine if your exposure was quality. I doubt shorts and a T-Shirt net you 10,000. I've been taking 5000iu's every day, for years - even in summer... but I don't "Lay Out" or boat or anything. If you're in a bathing suit a lot, maybe skip on those days?
Vitamin D overdose, even when it occurs, isn't that big of a deal. Factory workers and mis-labeled supplement bottles have resulted in *Millions of IU's* being consumed, and recovery is basically staying out of the sun and taking, I think, Prednisone.
As far as levels, a 25 Hydroxy Vitamin D test can tell you. Lots of docs are doing them now. I don't think bumping up to 5K will hurt, but it's your body, not mine
Everyone is different and the only way you would know is to have your 25-hydroxy vitamin D level checked. Sunshine is a good alternative. I take a lot less D3 in the summer...but still some as I work inside.
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