Vitamin D may improve your energy levels. Here's how much you need each day

Gold Colored Soft Capsules on Beige Background (Credit: Getty Images)

You might have heard that vitamin D can be crucial for bone health, and that taking supplements may be in order if you're not getting enough naturally from sunlight or from D-rich foods like eggs, oily fish, or fortified milks.

You've maybe even heard that vitamin D has been shown to improve cognitive function and to lower the risk of heart attack.