Immunocal is a patented, cysteine-rich whey protein isolate developed to help support the body’s natural production of glutathione, often referred to as the body’s “master antioxidant.” It’s commonly used by people focused on immune support, recovery, and protection from everyday oxidative stress, and is also popular among active individuals looking to support muscle strength and performance. Immunocal is generally well tolerated and is available in several options, including Immunocal (Original), Immunocal Platinum, and Immunocal Sport, allowing users to choose a formula that fits their lifestyle and activity level.