It says it's an anti-oxidant, which prevents oxidation aka damage to cells by fighting free radicals. Omega-3s and certain vitamins can also be anti-oxidants.
What’s especially unique about Astaxanthin is its ability to cross your pet’s blood-brain and blood-retina barriers.
Translation: It can pass through the barrier that protects the brain from many other chemicals, so the anti-oxidant supposedly would also work in the brain. Same for the blood-retina barrier -- it supposedly would work in the retinal area of the eyes.
Do you think Vlad needs more anti-oxidants?