Astaxanthin and Weight Loss: Why It Is Not a Fat Burner
Pooled trials show no effect on body weight or BMI, and a 2025 athlete trial found no change in body fat. Here is what astaxanthin does and does not do for body composition.
Astaxanthin Third-Party Testing: Which Quality Certifications Actually Exist
NSF and USP are the two real supplement quality marks, and almost no standalone astaxanthin product carries either. Here is what actually exists, and what to look for instead.
Astaxanthin and Kidney Health: Why Strong Animal Data Has Not Reached Human Trials
Astaxanthin protects rodent kidneys across injury, diabetes and fibrosis models. No human trial has ever measured a kidney endpoint. What that gap means.
Astaxanthin for Children: What the Pediatric Evidence and Safety Limits Actually Show
One RCT tested 4 mg astaxanthin in kids aged 10-14. EFSA says an 8 mg adult dose exceeds the safe daily intake for that age group. What parents should know.
Astaxanthin and Testosterone: What the Human Evidence Actually Shows
Astaxanthin is marketed for testosterone support, but the one trial that measured testosterone directly found no significant change. Here’s what the human evidence actually shows.
Astaxanthin and Liver Health: What Human Meta-Analyses Actually Show About ALT and Liver Enzymes
Animal studies suggest astaxanthin protects the liver. Human meta-analyses of randomized trials tell a different story, including a small but significant ALT increase.
Astaxanthin and Gut Health: What Emerging Research Shows About Inflammation and Microbiome Effects
There’s no human trial yet on astaxanthin and gut health. Here’s what the simulated-gut-model, animal, and epidemiological research actually shows.
Astaxanthin and Macular Degeneration: What the AMD-Specific Evidence Shows
Does astaxanthin help age-related macular degeneration? A look at the clinical trials on visual acuity, retinal function, and choroidal blood flow.
Astaxanthin vs Lutein and Zeaxanthin for Eye Health: What the Evidence Actually Shows
Astaxanthin, lutein, and zeaxanthin protect eyes through different mechanisms. Here is what clinical evidence says about each carotenoid for AMD, cataracts, and
What Is Astaxanthin? A Guide to the Marine Carotenoid
Astaxanthin is a marine carotenoid from microalgae with a unique antioxidant structure. Learn what it is, how it works, and what early research suggests.
Natural vs Synthetic Astaxanthin: Does the Source Matter?
Natural and synthetic astaxanthin differ in stereochemistry and esterification. Here’s what the evidence actually shows, and where it is still limited.
How Long Does Astaxanthin Take to Work? A Timeline by Benefit
Astaxanthin timelines vary by goal: from 4 weeks for sport-specific exercise performance to 8 to 12 weeks for metabolic markers. Here’s what the evidence actually shows.