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Author Topic: Astaxanthin - ? interferes with metabolism of Sustiva + ? risk to HIV control  (Read 5185 times)

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Offline andrewpiccadilly

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My HIV has been well controlled on Sustiva and Truvada for a number of years now. I have recently researched the health benefits of astaxanthin as a powerful anti-oxidant. Several research papers evidence its role in reducing cancer risk, protecting against UV skin damage and improving skin appearance, reducing muscle and joint inflammation etc etc. I started taking this suplement a week ago and have felt that the symptoms of sustiva (efavirenz) - nightmares, feeling hazy- have returned. Having researched possible drug interactions there appears to be proof that astaxanthin induces the CYP450 enzyme system (involved in breaking down efavirenz) in the liver of rats. However I cant see proof that this is the case in humans - the only paper was with in vitro human hepatocellular tissue. I would be grateful if someone could let me know if there is definitive evidence that astaxanthin induces CYP450 in humans and if this is dose related ( I have been taking 6 capsules = 24mg / day). I would like to continue taking ataxanthin because of its benefits but dont want to risk upsetting my HIV control. Also - I cant understand if there is an increase in P450 why I would experience more symptoms of efavirenz as I would have thought that it would be broken down quicker and therefore have less symptoms - unless it is the metabolites from the breakdown of efavirenz that cause the symptoms.? Any advice would be very much appreciated. Thanks. Andrew

Offline veritas

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Astaxanthin is a little known and yes, powerful, anti-oxidant that recently has generated  a lot of interest in reducing oxidative stress and inflammation. The company that seems to be at the forefront of this research is Cardax Pharmaceuticals. If you contact the company, they might be able to answer your questions. However, since the research is relatively new, definitive answers might not be available. Here's a link to Cardax:


NIH seems to be interested, they received a grant for their liver drug.



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