I've been trying to kick up my game a little bit so in addition to eating clean (Paleo, relatively low carb) and supplementing with Whey, fish oil and green tea I decided about 3-4 days ago to add Vit D and Zinc. I've been taking these in the morning with breakfast and they seem to be hitting me like a handful of benadryl. I wouldn't say it's anywhere near blacking out but it's really making me tired and really muzzy. I'm pretty sure it's the Vit D because on day 4 I tried an experiment and took a second Zinc in the afternoon and had no addition fatigue.
I can't find any indication that D3 can make you tired/sleepy/fatigued, if anything it's supposed to be the opposite. What gives? If I didn't know better I'd say it was crashing my blood sugar, but without the stressed/panicky feeling that can happen.
I'm taking 1,000IU D3 and 50mg zinc (Gluconate) AM
I'm a big guy trying to drop weight and get healthy, it's possible my insulin sensitivity isn't all it could be, but I've had blood work in the last year (at my heaviest) that showed healthy blood sugar levels, and no diabetes. I'm gonna try taking these PM. If anyone has any thoughts it would be a big help! The zinc at least has had a number of VERY POSITIVE effects, beyond belief. The wife can vouch for it!! LOL