Like any other supplement it is wise to ask your Doctor if it interacts any of the medications you are currently on. Also w/ auto-immune disorders (ie. Lupus or MS) you want to be extra careful as your immune system is sensitive.
This one I started taken a couple of months ago and have really noticed a difference. Here is an excerpt from Vitacost.com, where I purchase it from.
1) NSI® Hawaii BioAstin® Natural Astaxanthin
This powerful supplement features Hawaii BioAstin®, which supplies astaxanthin, one of nature’s strongest antioxidants, in a synergistic formula with natural Vitamin E. Human clinical results indicate Hawaii BioAstin® supports joint function after heavy exercise and supports skin structure during sun exposure.
Astaxanthin is a naturally-occurring carotenoid, a natural pigment produced by microalgae. It contains powerful antioxidant properties that help protect the body’s healthy cells from the damaging effects of free radicals, unstable molecules produced by daily exposure to certain environmental factors (such as pollution and the sun’s UV rays) and certain normal functions (such as exercise and digestion).
This all-natural, super antioxidant offers numerous health advantages. It may boost the immune system, support gastrointestinal health and promote healthy blood sugar levels (and as a result, liver health). In addition, astaxanthin may strengthen the cardiovascular system, encourage healthy cholesterol levels, help maintain brain and cognitive health, contribute to joint health and comfort, and enhance reproductive health.
Astaxanthin has also been found to promote younger-looking skin from within, working as a natural sunscreen that helps protect skin from sunburn and damage to DNA. It also supports healthy vision by helping protect eyes from the sun’s harmful UV rays.
For those engaged in physical activity, the antioxidant capabilities of astaxanthin are important because during exercise, the body pumps oxygen through tissues, ultimately leading to oxidative stress and free radical damage. When astaxanthin is present in muscles, it helps inhibit this occurrence, protecting muscles from degeneration, and helping to increase endurance, performance and recovery.