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This means that they are still making glutathione, but they dont keep enough of it around to protect them from oxidative stress

W.et al (2015)

Additionally, the Na/K ratio in both roots and shoot was higher in the only 100 and 150 mM alkaline fed seedlings in comparison to that of the untreated control plants

Recalls & Warnings May 20, 2005 Seller of "Ocular Nutrition" Supplement Settles FTC Charges On March 16, 2005, The Federal Trade Commission (FTC) announced that Hi-Health Supermart Corporation (Hi-Health) and its owner, Simon Chalpin, settled FTC charges that they made unsubstantiated advertising claims that their product Premier Formula for Ocular Nutrition-Optim3 (Ocular Nutrition)

Nat Biotechnol 28(9):917924

However, they are generally considered more beneficial when combined with appropriate topical care, daily sun protection, and healthy lifestyle practices