Supports Reproductive Function. Vitamin B6, or pyridoxine, is required for the metabolism of lipids, carbohydrates and proteins. It facilitates the conversion of amino acids from one to another and is necessary for the normal synthesis of haemoglobin, as well as the normal function and growth of red blood cells. Vitamin B-6 promotes a healthy immune system and helps recycle homocysteine back to the amino acid methionine, thus preventing an unwanted build-up of homocystine. It is also needed for the synthesis of the neurotransmitters serotonin, gamma amino butyric acid (GABA) and dopamine and for the conversion of essential fatty acids into prostaglandins (chemical messengers).