Reviva Labs DMAE Concentrate, Firming Facial Serum, 1 ozReviva DMAE Firming Fluid Higher potency DMAE concentrate. Ideal to help firm and tone throat and facial skin for a more supple, more youthful look. For maximum skin care results, individual areas need individualized formulas. Fragile, vulnerable throat skin, one of the first areas to show aging, often needs more than lubrication and nourishment. DMAE uniquely stimulates muscle tone for firmer, tighter throat and facial areas. Acetylcholine is one of