Astaxanthin
Why salmon is pink
- Type
- Carotenoid antioxidant
- Typical amount
- Studies commonly use 4–12 mg per day.
- Best taken
- As directed on the formula label
- Caffeine
- None
- Main source
- It comes from the microalga Haematococcus pluvialis, and is found in salmon, trout and shrimp that eat it.
- Evidence level
- Limited / emerging
Astaxanthin is a red carotenoid antioxidant produced by microalgae and responsible for the pink colour of salmon and shrimp.
What is Astaxanthin?
Astaxanthin is a red carotenoid antioxidant produced by microalgae and responsible for the pink colour of salmon and shrimp.
How Astaxanthin works in the body
It is a powerful antioxidant studied for protecting cells, supporting mitochondria and reducing oxidative stress. In practical terms, this is the mechanism weight-loss formulas are counting on when they include astaxanthin.
What the research says about Astaxanthin and weight
Human research on Astaxanthin specifically for weight is limited or early-stage. Much of the rationale comes from traditional use, lab studies, or its general nutritional role. That doesn’t mean it doesn’t help — only that strong clinical proof for a weight effect isn’t established yet.
How much Astaxanthin to take
Studies commonly use 4–12 mg per day. Always check the label of your specific formula — blends often contain less astaxanthin than studies use, especially inside proprietary blends that don’t disclose exact amounts.
Food sources and supplement forms
It comes from the microalga Haematococcus pluvialis, and is found in salmon, trout and shrimp that eat it.
Why Astaxanthin appears in weight-loss formulas
It appears in antioxidant and mitochondrial formulas for its potent cell-protective research.
Safety, side effects and interactions
Generally very well tolerated; high doses may give skin a slight orange tint, which is harmless. As with any supplement, if you are pregnant, breastfeeding, taking medication or managing a health condition, check with your doctor first.
How to choose a quality Astaxanthin supplement
When choosing a Astaxanthin product or a formula containing it, look for one that discloses the actual amount of astaxanthin (not just a proprietary-blend total), uses a recognizable form, and is made by a brand with third-party testing or GMP manufacturing. More isn’t always better — match the dose to what research and the label suggest, and be wary of products that hide quantities behind a blend.
Why salmon is pink
Astaxanthin from algae is what turns salmon and flamingoes pink — and it is among the most potent natural antioxidants studied.
Common questions about Astaxanthin
What does Astaxanthin do for weight loss?
How much Astaxanthin should I take?
Is Astaxanthin safe?
How strong is the evidence for Astaxanthin?
Will Astaxanthin alone make me lose weight?
Does the dose in supplements match research?
Supplements with Astaxanthin
Formulas in the SourceLean directory that list Astaxanthin or a closely related form among their ingredients:
Related ingredients
Explore other compounds commonly found in weight-loss formulas:
Ingredient insights, explained
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