Here's what to know about vitamin D3 benefits, sources, deficiencies, side effects and more ... over-the-counter are sold in dosages between 1000–5000 IU, but some are higher.

Too much vitamin D3 can cause serious side effects in babies. "Prolonged use of the recalled Baby's Vitamin D3 Liquid could ...

Learn about the best time of day and way to take vitamin D and if you should consider a supplementing with this nutrient.

This medication is a multivitamin product used to treat or prevent vitamin deficiency due to ... benefit to you is greater than the risk of side effects. Many people using this medication do ...