New Zealand's Trusted Astaxanthin Resource

Astaxanthin: New Zealand's Complete Resource on Nature's Most Powerful Antioxidant

Astaxanthin has the broadest clinical evidence of any antioxidant on the supplement shelf. Trials cover skin, eyes, joints, heart, brain and immune function, at a daily dose you can hit with two softgels.

It’s also the antioxidant most New Zealanders still haven’t heard of. This site exists to fix that.

What is Astaxanthin?

Astaxanthin is the red pigment in wild salmon flesh and lobster shells. It comes from a freshwater microalgae called Haematococcus pluvialis, which produces astaxanthin as a stress response when sunlight, dehydration or temperature extremes threaten the cell. Marine animals that eat the algae accumulate it in their tissues. Flamingos are pink because they eat algae-fed shrimp.

Chemically, Astaxanthin belongs to the carotenoid family alongside beta-carotene and lycopene. It sits in the xanthophyll subgroup, meaning its molecule contains oxygen atoms that other carotenoids lack. Those oxygen atoms change how the molecule sits inside cell membranes and how it interacts with free radicals. That’s the reason astaxanthin does things vitamin C and vitamin E can’t.

Some Haematococcus cells have been documented surviving over 40 years in a dormant state without water, kept alive by the astaxanthin shielding their DNA from light damage. The same molecule that keeps a microalgae alive through four decades of drought does measurable things in human skin, retina, joint and brain tissue when taken as a daily supplement.

Why Astaxanthin stands apart from every other antioxidant

Three structural properties separate astaxanthin from every other antioxidant in the supplement aisle.

Works in water and fat at once

Vitamin C works only in the watery parts of a cell. Vitamin E works only in the fatty parts. Astaxanthin works in both.

The molecule sits inside a cell membrane like a rivet, with the lipid section anchored across the fatty layer and the polar tips poking out into the watery fluid on either side. Damage gets intercepted before it spreads.

Crosses blood-brain & retinal barriers

Most antioxidants don’t reach the brain or the eye. The barriers protecting those organs block them. Astaxanthin gets through.

That’s why it’s one of the few supplemental antioxidants with documented effects on cognitive performance and eye fatigue in human trials.

Can't become a pro-oxidant

Vitamin C, vitamin E and beta-carotene can all flip into damage-causing pro-oxidants at high doses or under certain conditions.

That’s the mechanism behind the CARET trial finding that high-dose beta-carotene raised lung cancer risk in smokers. Astaxanthin’s structure doesn’t allow the switch. The ceiling for harm sits far above anything used clinically.

6,000

vitamin C

800

CoQ10

550

vitamin E

alpha-lipoic acid

beta-carotene

Nishida (2007) measured astaxanthin’s singlet-oxygen quenching capacity against the rest of the antioxidant shelf.

These are lab assays, not clinical outcomes. They explain why astaxanthin produces measurable effects at 4 to 12 mg per day, where vitamin C trials typically need 500 to 2,000 mg to register anything.

See the full breakdown on Astaxanthin vs other antioxidants

See the full breakdown on

What Astaxanthin does in the body

Over 100 human clinical trials have published on astaxanthin. The strongest evidence sits in six areas. Each with its own page and full citations.

Skin health and visible aging

Tominaga (2012) measured improvements in elasticity, line depth, age spots and moisture in Japanese women at 6 to 12 mg per day over 8 weeks.

The mechanism is dual: less UV-induced damage to dermal cells, plus protection of the collagen and elastin matrix that keeps skin firm.

Eye health and visual fatigue

Astaxanthin concentrates in the macula and retina. Clinical trials at 6 to 12 mg per day show reduced eye strain in office workers, faster accommodation between near and far focus, and improved choroidal blood flow (Saito 2012).

Joint comfort and mobility

Astaxanthin reduces the daily aches and stiffness associated with active living and aging. Trials show benefits in tennis elbow, rheumatoid arthritis and exercise-induced inflammation.

The molecule modulates the same inflammatory pathways as ibuprofen, without damaging the gastric lining.

Heart and cardiovascular health

Yoshida (2010) showed higher HDL cholesterol and adiponectin in patients with mild hyperlipidemia after 12 weeks at 6 to 18 mg per day.

Other trials document reduced LDL oxidation (the trigger for plaque formation), improved blood flow and modest blood pressure reductions in hypertensive patients.

Brain function and cognitive aging

Astaxanthin is one of the few orally available compounds that crosses the blood-brain barrier and reaches neurons directly.

Trials in older adults show improvements in cognitive test scores, memory and processing speed after 12 weeks of supplementation.

Immune system and exercise recovery

Park (2010) documented enhanced antibody response, increased natural killer cell activity and reduced DNA damage markers in healthy adults supplementing 2 mg per day for 8 weeks.

Endurance athletes use it to reduce exercise-induced muscle damage and recovery time.

Skin health and visible aging

Tominaga (2012) measured improvements in elasticity, line depth, age spots and moisture in Japanese women at 6 to 12 mg per day over 8 weeks.

The mechanism is dual: less UV-induced damage to dermal cells, plus protection of the collagen and elastin matrix that keeps skin firm.

Eye health and visual fatigue

Joint comfort and mobility

Astaxanthin reduces the daily aches and stiffness associated with active living and aging. Trials show benefits in tennis elbow, rheumatoid arthritis and exercise-induced inflammation.

The molecule modulates the same inflammatory pathways as ibuprofen, without damaging the gastric lining.

Heart and cardiovascular health

Yoshida (2010) showed higher HDL cholesterol and adiponectin in patients with mild hyperlipidemia after 12 weeks at 6 to 18 mg per day.

Other trials document reduced LDL oxidation (the trigger for plaque formation), improved blood flow and modest blood pressure reductions in hypertensive patients.

Brain function and cognitive aging

Astaxanthin is one of the few orally available compounds that crosses the blood-brain barrier and reaches neurons directly.

Trials in older adults show improvements in cognitive test scores, memory and processing speed after 12 weeks of supplementation.

Immune system and exercise recovery

Park (2010) documented enhanced antibody response, increased natural killer cell activity and reduced DNA damage markers in healthy adults supplementing 2 mg per day for 8 weeks.

Endurance athletes use it to reduce exercise-induced muscle damage and recovery time.

Secondary benefit areas including menopause, men’s health and metabolic health are covered in the Benefits Hub

Secondary benefit areas including menopause, men’s health and metabolic health are covered in the

Natural vs Synthetic Astaxanthin: why the source matters

Two completely different molecules get sold under the name astaxanthin. Confusing them is what makes the difference between a supplement that works and one that’s a colourant for fish food.

Natural astaxanthin

Extracted from Haematococcus pluvialis microalgae

Grown in controlled conditions. The molecule is identical to what you’d consume eating wild salmon or krill. It comes esterified, which is the form the body recognises and absorbs efficiently. Every major human safety and benefit trial has used this form.

Synthetic astaxanthin

Manufactured from petrochemicals in laboratories

The molecular structure is similar but stereochemically different (different ratios of mirror-image molecules). It scores up to 20 times lower in laboratory antioxidant assays, hasn’t been through the same human safety testing, and is used almost exclusively as a colourant in farmed salmon and trout feed. It shouldn’t be in a supplement marketed for human health.

Full breakdown of sources, forms (softgel, oil, powder), and how to verify quality on the Sources Page

Full breakdown of sources, forms (softgel, oil, powder), and how to verify quality on the

How much astaxanthin should you take?

The clinically studied dose range is 4 to 12 mg per day with a meal containing some fat. Use 4 to 6 mg for general antioxidant support. Step up to 6 to 12 mg for skin or eye concerns. Use the top of the range (12 mg) for joint inflammation, athletic recovery or anti-aging applications.

Astaxanthin bio-accumulates. The first few days produce no noticeable effect. Most people report the first changes between weeks 2 and 4, usually skin smoothness or reduced eye fatigue. Joint and cardiovascular effects take 8 to 12 weeks. This is a slow-building molecule, not a stimulant.

Take it with breakfast or the largest meal of the day. The meal needs some fat. Time of day doesn’t change efficacy. Consistency does.

How much astaxanthin should you take?

6 mg

General antioxidant support

6-12 mg

Skin or eye concerns

12 mg

Joints, recovery, anti-aging

Full dosage guide, including how long to see results, half-life, and whether to cycle, on the Dosage Page

Full dosage guide, including how long to see results, half-life, and whether to cycle, on the

Is astaxanthin safe?

Astaxanthin has one of the strongest safety records of any supplemental antioxidant. Brendler & Williamson (2019) reviewed the safety literature and found no significant adverse events at doses up to 50 mg per day for 12 weeks.

At doses above 40 mg per day, some people develop a faint orange-pink tint to the skin, which is harmless and reverses when supplementation stops. At standard doses of 4 to 12 mg, no skin tinting has been reported in trials.

Two cautions worth flagging:

Astaxanthin has a mild antiplatelet effect. Anyone on warfarin, clopidogrel, daily aspirin or other anticoagulants should clear it with their doctor before starting.

There isn’t enough specific human safety data on astaxanthin during pregnancy or breastfeeding, even though dietary intake from salmon and seafood is considered safe.

Full safety information, drug interactions and contraindications on the Safety Page

Full safety information, drug interactions and contraindications on the

Backed by more than 1,000 studies

Astaxanthin has more than 1,000 peer-reviewed publications behind it. The strongest human clinical trials are organised by body system in the research library, so the evidence can be read directly.

Browse the

Frequently asked questions

How is astaxanthin different from beta-carotene or other carotenoids?

Astaxanthin sits at the end of a chemical chain shared by other carotenoids, but it has two oxygen-containing groups that no other common carotenoid has. Those groups let it anchor inside cell membranes and span both fat and water environments. They also stop it from flipping into a pro-oxidant the way beta-carotene can. The CARET trial found high-dose beta-carotene raised lung cancer risk in smokers. No equivalent finding has surfaced for astaxanthin after 25 years of use.

How long until I feel results?

Most people notice the first effects between weeks 2 and 4, typically skin smoothness or reduced eye fatigue. Joint and cardiovascular benefits take longer, usually 8 to 12 weeks of consistent daily use. Astaxanthin bio-accumulates, so the longer you take it the more pronounced the effects become.

Can I get enough astaxanthin from food?

Not realistically. To match a 12 mg supplement dose from wild Atlantic salmon, you would need to eat roughly 1 kg of salmon every day. Krill contains higher concentrations but is rarely consumed in meaningful amounts. For people who already eat wild salmon several times a week, a lower 4 mg supplement dose may be appropriate.

Should I take astaxanthin with food?

Yes. Astaxanthin is fat soluble. Taking it with a meal containing some fat (avocado, eggs, olive oil, nuts, oily fish) can roughly triple absorption compared to taking it on an empty stomach.

Will astaxanthin make my skin turn orange like beta-carotene can?

Only at doses well above what supplements provide. At 4 to 12 mg per day, no visible skin tinting has been reported in trials. Above 40 mg per day, some people develop a faint orange-pink tint that’s harmless and reverses when they stop.

Can I take astaxanthin with my other supplements?

In almost all cases, yes. Astaxanthin combines well with vitamin C, vitamin E, fish oil, CoQ10, collagen and most multivitamins. It works synergistically with vitamin E, regenerating oxidised vitamin E back to its active form.

Is the astaxanthin in farmed salmon the same?

No. Most farmed salmon is fed synthetic astaxanthin produced from petrochemicals, purely as a colourant to make the flesh pink. This synthetic version is up to 20 times less effective as an antioxidant than natural astaxanthin from Haematococcus pluvialis algae.

Where can I buy astaxanthin in New Zealand?

Biosphere Astaxanthin is New Zealand’s longest-running and most widely distributed astaxanthin supplement. You can buy directly through our shop page or find it at health stores, pharmacies and supermarkets nationwide.

Get started with astaxanthin today

Astaxanthin is one of the few supplements where the evidence matches the marketing. If you’re over 35 and thinking about skin, joints, eyes or long-term brain health, it’s worth adding to the daily stack. At New Zealand prices, the daily cost runs to about a dollar.