Fortisil-C - High Performance Marine Collagen 1.25gm Vitamin C 32.5mg Skin Firmness & Hydration 10 Effervescent Tablets. Active Dipeptides Fortisil-C contains higher concentration active dipeptides like Proli- Hydroxyproline & Hydroxypoly- Glycine. These dipeptides are proven to be more efficient than any other dipeptides. These dipeptides remain s..