Vitamin A toxicity is relatively rare but can occur if someone is taking high dose supplements. Symptoms of vitamin A toxicity include muscle and bone pain, headaches, nausea, and hair loss.

Here are a few reasons why our bodies need vitamin D, experts say: It’s essential for bone health. Vitamin D supports healthy bone formation and bone remodeling, says Araujo.

Vitamin D toxicity is usually the result of taking too many supplements, says Araujo. It is a potentially life-threatening condition that could lead to kidney failure , irregular heartbeat or ...