Question: I noticed that Swanson Ultra EyesAlive (60 capsules) and Swanson Ultra EyesAlive (120 capsules) has 80 mcg of canthaxanthin. I am concerned about this, since in consumerlab.com's write-up on their test of lutein products they say, “One potential, but unlikely, concern with lutein and zeaxanthin is product contamination with a related, naturally occurring compound called canthaxanthin. With high levels of intake, it can form potentially damaging crystals in the retina.” I would like to know more about the safety of EyesAlive.
Be assured that the 80 mcg of canthaxanthin in Swanson Ultra EyesAlive Vision Nutrition™ does not exceed the amount that naturally occurs in commonly consumed foods high in lutein like spinach and broccoli. (80 mcg is less than 1/10 of a milligram.) Some companies market canthaxanthin as a self-tanner, however, in potencies of 30 mg or more per pill, since it will turn the skin brownish-orange, and this potency may be a cause for concern. Keep in mind that 30 mg is the same as 30,000 mcg, and 375 times the amount of canthaxanthin found in EyesAlive.
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