Immunocal® is an undenatured whey protein isolate specifically designed to provide the body with the precursors needed for the natural production of glutathione, the body's master antioxidant.
The research behind this technology began more than 45 years ago, particularly through the pioneering work of Dr. Gustavo Bounous, Dr. Patricia Kongshavn, and many other collaborators. Following years of scientific development, Immunocal® has been commercially available for more than 30 years.
Unlike glutathione supplements, Immunocal® does not contain glutathione. Instead, it provides the specific precursors your cells need to naturally produce their own glutathione.
Today, this technology is supported by more than 92 published scientific studies and ongoing university collaborations, including research conducted with McGill University.
✅ Original formula commercially available for over 30 years
✅ Exclusive patented cysteine delivery technology
✅ Available in more than 30 countries
✅ Made in Canada

Glutathione is produced directly inside every cell in your body. To make it, your cells require three amino acids: glutamate, glycine, and especially cysteine, which is often the limiting factor.
Immunocal® provides a naturally protected form of cysteine, allowing your cells to produce more glutathione according to their individual needs.
Unlike glutathione supplements, which must pass through the digestive system before being absorbed, Immunocal® works upstream by supplying the building blocks your body needs to naturally produce its own glutathione.
This approach supports the body's natural biological processes and helps explain why Immunocal® has been studied for more than 45 years.

Immunocal® provides the glutathione precursors your body needs to naturally increase its glutathione levels. As an essential antioxidant found in virtually every cell, glutathione plays a key role in cellular protection and overall health.

For more than 30 years, Immunocal® has been the subject of scientific research and collaborations with universities and research centers around the world. Today, Today, more than 92 published scientific studies support its role in promoting the body's natural production of glutathione.
🛡️ Supports a healthy immune system
🧬 Natural source of the glutathione precursor (cysteine)
💪 Helps develop and maintain lean muscle mass*
🏋️ Helps increase muscle strength and performance*
🥛 Source of high-quality protein and essential amino acids
🧪 Natural Health Product licensed by Health Canada (NPN 80004370)
*The claims related to muscle strength, performance, and lean muscle mass apply when Immunocal® is combined with a regular resistance training program and a healthy, balanced diet, in accordance with Health Canada's approved conditions of use.
Source: Health Canada – Licensed Natural Health Products Database (LNHPD). Information accessed in July 2026.

Glutathione is essential for the normal function of your body's cells. However, the different approaches available on the market do not work in the same way.
Immunocal® does not provide glutathione directly. Instead, it supplies the body with a specific form of cysteine, the key precursor your cells use to naturally produce their own glutathione.
The comparison table below summarizes the main differences between these approaches.
Discover why Immunocal® is now one of the world's most extensively studied glutathione precursors.
▶ Watch this short video to learn what makes Immunocal® unique.

You have now explored the science, the research, Health Canada–authorized claims, and the key features of Immunocal®.
Now it's time to discover the product itself.
Visit the official Immunotec® store to learn more about Immunocal® and find the option that best fits your needs.
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