Soren, O., Brinch, K.S., Patel, D., Liu, Y., Liu, A., Coates, A., et al., Antimicrob
Its very origin story hints at its robust, protective nature
Optimal Glutathione Plus
The answer is that both ingredients work differently, and together they can provide stronger support for skin health than either one alone

L-Glutamine Capsules: Each 1-VegCap serving of our L Glutamine supplement provides 500 mg of l-glutamine, the most common free amino acid in the body and one of the key building blocks of protein Powerful Antioxidant Support: L-glutamine, along with the amino acids l-cysteine and l-glycine are used by the body to form glutathione, the Master Antioxidant.* Immune Support Supplement: Taken consistently, l-glutamine may help provide nutritive support for healthy immune system function and overall wellness support.* Muscle and Digestive Support: L-Glutamine serves as a primary fuel source for cells in the gastrointestinal system and may help support healthy muscles and digestion under conditions of physical stress.* Lab Verified Quality: Our L-Glutamine is thoroughly tested and verified for potency, purity, and identity in our state-of-the-art in-house laboratory to ensure only the highest quality ingredients

Studies measuring copper levels in users of GHK-Cu products have not shown clinically significant increases in systemic copper, and there are no reports of copper toxicity from GHK-Cu cosmetic use