Vitamin B-6 is used to help the body convert protein to energy. It also contributes to proper brain function. Research has shown that vitamin B6 works with folic acid and B12 to reduce levels of homocysteine (an amino acid) in the blood. Elevated homocysteine levels can increase a person's risk of heart attack.

Selenium is a trace mineral that helps boost the immune system and prevent cancer by eradicating free radicals. It also may guard against heart attack and stroke by reducing the chance of blood clots.