"Skin Care & Skin Repair. Soft Soy is a concentrated soy based serum that penetrates deeply to transform the look of your aging skin. Soft Soy tightens and rejuvenates sagging skin on your throat and chin and diminishes wrinkles. Use soft soy alone or under makeup for improved skin tone and smoothness. Unlike other liquid skin products, Soft Soy will not leave a greasy mess on your skin. It sinks deep into your skin and adds moisture. Soy can act as an antioxidant, therefore, decreasing skin dam