Zinc-220 Buffered CTR - 90 Tablets (Vitaline). Works with the body's own immune response and can enhance immune activity when it's needed most. Zinc-220 provides support for the immune system and overall health. This formula was designed to allow gradual release of active ingredients to support the immune system. Also supports healthy enzyme activity, cell structure integrity and the gastrointestinal function. Recommendations: Adults take 1 tablet daily or as directed by your healthcare practitioner.