Supplements Guide: Side Effects & Best Multivitamins

Vitamins and supplements like melatonin and fish oil offer health benefits but can cause side effects if misused. Learn about the impact of saw palmetto on blood pressure and find the best multivitamins for young women and adults over 50.

Vitamin D Deficiency & Heart Palpitations

Published Jul,08 2011 | By Chuck Eke-Okoro

Vitamin D is fat-soluble, and it naturally exists as vitamin D3. Vitamin D3 is synthesized beneath the skin under direct sunlight. Vitamin D is active in the development and calcification of bone. Its absorption is mainly from diets high in vitamin D, such as fish, eggs and vitamin D fortified milk.