Vitamins are organic compounds required for nearly every metabolic process in the body, but some help increase metabolism and burn fat better than others. Some vitamins help boost metabolism by assisting with amino acid production, which is needed to burn fat and promote lean muscle. Others are essential for energy metabolism and converting food into cellular fuel. There are also minerals and supplements that can really help individuals boost their metabolism.
Vitamin A is a fat-soluble vitamin the body needs for the regulation of thyroid hormone, which is particularly beneficial for metabolism and digestion. A 2012 study found not getting enough vitamin A may increase the risk of hypothyroidism, which causes weight gain and fatigue. Thyroid hormone affects the rate of metabolism because it is responsible for signaling how the body's cells should utilize energy. Low levels of thyroid hormone may slow down metabolism and cause weight gain. Carrots, squash, red pepper, spinach, mango, and cantaloupe are good sources of vitamin A.