Unopened 8 lb. bag (64-day supply)- paid close to $170 (including tax), asking $150 and offering FS. IN-SYNC 4 Pellets are designed to help support efficient muscle function, immune system health, normal blood cell production and hair coat. The comprehensive formula includes lysine and methionine for muscle development; thiamine, niacin, riboflavin, and vitamin B12 for red blood cell production; natural vitamin E and other antioxidants for immune system function; and magnesium, selenium, and DMG for muscle function. In addition, key ingredients such as magnesium, vitamin E, lysine, and DMG may also help manage muscle discomfort.