D is for balance

An interesting review on the impact of Vitamin D supplementation on muscle strength, gait and balance in older adults

Effect of vitamin D supplementation on muscle strength, gait and balance in older adults: a systematic review and meta-analysis.

Supplemental vitamin D with daily doses of 800 to 1,000 IU consistently demonstrated beneficial effects on strength and balance. An effect on gait was not demonstrated, although further evaluation is recommended.

So one to give the old people....