I've been taking Vitamin D supplements for a few months. It started after reading a few articles on HN about how the RDA for Vitamin D was too low. Then I came

I've been taking Vitamin D supplements for a few months. It started after reading a few articles on HN about how the RDA for Vitamin D was too low. Then I came across the NHS guidance which say in effect that everyone should consider taking a Vitamin D supplement, especially those who don't get out in the sunshine much (like most developers). Since there is basically no downside I started taking them. Anecdotally I feel less lethargic when I remember to take them than when I slip out of the habit. I'm not sure whether that is just the placebo effect but the cost is low enough that it's worth it in either case.