Iron deficiency is one of the most common mineral deficiencies, but iron can also be dangerous if you're getting too much. Many processed foods contain added iron in the forms of ferrous Acetyl L Carnitine Supplement (ALCAR) 500 mg Superior Labs Acetyl L Carnitine 250 mg Hypoallergenic People who have difficulty digesting red meat typically have low stomach acid. Betaine hydrochloride may help strengthen your stomach acid and resolve this problem. Try taking three to five betaine hydrochloride supplements