Bio-FCTS is a broad‑spectrum bioflavonoid formula combining potent antioxidants and glandular support to help stabilize vitamin C and bolster immune health. Key components include 75 mg of vitamin C (ascorbic acid) and 100 mg of quercetin (Dimorphandra mollis), paired with a proprietary blend of buckwheat culture, green tea extract (leaf, 40% catechins), citrus bioflavonoids, and neonatal bovine thymus and spleen extracts.