Source Naturals DMAE dietary supplement features dimethylaminoethanol bitartrate to help support mental concentration. This product is suitable for vegetarians and is hypoallergenic. It contains no yeast, dairy, egg, gluten, corn, soy, wheat, sugar, starch, salt, preservatives or artificial color, flavor or fragrance. DMAE is naturally found in some foods. It is a highly bioactive nutritional precursor to acetylcholine, a key neurotransmitter. DMAE has also been found to enhance concentration.