Ingredient research
Astaxanthin for Eye Strain: What the Studies Found, and Where They Stop
Astaxanthin may ease eye strain a little. Small human studies at 4 or 12 mg a day for 28 days suggested less eyestrain and better focusing, but most evidence comes from animals and larger trials are still needed. VisiFlora lists astaxanthin without an amount, so no one can match it to those studies.
Written by the VisiFlora editorial teamUpdated · 7 min read
The ingredient
What is astaxanthin?
Astaxanthin is a red carotenoid, a natural pigment usually made from algae. It is in the same family as lutein and zeaxanthin, the pigments in the macula.
Supplement makers sell it for tired eyes and focusing. VisiFlora lists it on the sales page, and the brand graphic shows it as one of six headline ingredients (Sales page, tryvisiflora.com).
The studies
What does research say about astaxanthin and eye strain?
The signal is small and early. A 2020 review describes small human studies where 4 or 12 mg a day for 28 days seemed to ease eyestrain or improve focusing.
The same review notes that most astaxanthin evidence comes from animal studies. It calls for more randomized and longer clinical trials before firm conclusions (Review: astaxanthin and the eye). Here is how that research lines up with what VisiFlora publishes:
| Name on the sales page | Astaxanthin |
|---|---|
| What it is | Red carotenoid, usually from algae |
| Type | Carotenoid |
| Amount per capsule | Not published |
| Amount used in research | 4 or 12 mg a day for 28 days in small eye-strain studies |
| Strength of evidence | Small, early human studies; mostly animal research |
| Why it is in the formula | Sold for eye strain and focusing |
| Main caution | No adverse events in the reviewed studies; the amount in VisiFlora is unknown. |
Small studies over four weeks are a starting point. They do not tell us what happens over months, in people with eye disease, or at other doses. Read the full astaxanthin profile for more.
In context
How does astaxanthin rank against other eye habits?
Near the bottom. Exams, not smoking, sunglasses and diet have far more support than any single ingredient.
Dilated eye exams on schedule
StrongFinds glaucoma and diabetic eye disease before you notice symptoms. (NEI: everyday ways to keep eyes healthy) (AAO: how often adults need eye exams)
AREDS2 formula, if you have intermediate AMD
StrongCut the risk of advanced AMD by about 25% over five years, in that group only. (NEI: who AREDS supplements help) (Cochrane: antioxidants for slowing AMD)
Not smoking
GoodOne of NEI's core steps for keeping eyes healthy. (NEI: everyday ways to keep eyes healthy)
UV-blocking sunglasses
GoodNEI advises lenses that block 99-100% of UVA and UVB. (NEI: everyday ways to keep eyes healthy)
Leafy greens, eggs and fish
GoodKale and spinach are top lutein sources; diet is the everyday route. (Review: lutein and zeaxanthin in foods) (NEI: everyday ways to keep eyes healthy)
20-20-20 breaks for screens
GoodEvery 20 minutes, look 20 feet away for 20 seconds; screen strain usually eases with rest. (AAO: screen time and eye strain tips)
Single ingredients (astaxanthin, bilberry)
WeakSmall or negative studies: bilberry failed rigorous night-vision trials. (Review: astaxanthin and the eye) (Systematic review: bilberry and night vision)
VisiFlora itself
No trialsNo published study; amounts are not published, so nothing can be compared. (FTC: health product advertising rules) (Brand advertorial, ACCESS Newswire)
Bar length shows how much published evidence supports each step for protecting your sight, based on the eye-health sources linked here. A reading aid, not a score from any one source.
The amount
How much astaxanthin is in VisiFlora?
The seller does not say. Zinc is the only amount the sales page publishes, and a brand-issued advertorial confirms no other quantity is disclosed (Brand advertorial, ACCESS Newswire).
| Small eye-strain studies | 4 or 12 mg a day for 28 days (Review: astaxanthin and the eye) |
|---|---|
| VisiFlora per capsule | Not published |
| Can they be compared? | No, not until the amount is printed |
Once your bottle arrives, read the Supplement Facts panel. If it shows an astaxanthin amount, write it down and compare it with 4 to 12 mg. Our page on what the label lists explains what to look for.
Safety
Is astaxanthin safe to take?
The clinical studies in the 2020 review reported no adverse events (Review: astaxanthin and the eye). Those were small, short studies, so they cannot rule out rare or long-term effects.
VisiFlora also lists other ingredients with known cautions. Ginkgo may raise bleeding risk with warfarin and other blood thinners (NCCIH: ginkgo). Alpha-lipoic acid may lower blood sugar and add to diabetes medicines (MSK: alpha-lipoic acid cautions).
Supplements can interact with medicines, and natural does not always mean safe (NCCIH: using supplements wisely). List every supplement for your doctor and pharmacist. Full details are on the side effects page.
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Why be careful with big astaxanthin claims?
Because the sales page and its upsell page make large claims for single ingredients without citing any study (Sales page, tryvisiflora.com). Strong-sounding comparisons are not the same as trial results.
The FTC says health claims need competent and reliable evidence, generally randomized, controlled human trials (FTC: health product advertising rules). For astaxanthin, that evidence is small and early. A fair summary is "may help eye strain a little, more trials needed", not more.
Free fixes first
What eases eye strain without a supplement?
Screen breaks and blinking. The American Academy of Ophthalmology advises the 20-20-20 rule: every 20 minutes, look at something 20 feet away for 20 seconds (AAO: screen time and eye strain tips).
Screens can cut blinking by about a third to a half, which dries the eyes. Screen eyestrain usually goes away with rest (AAO: screen time and eye strain tips). Our guide to the 20-20-20 rule sets up a simple routine.
When to get checked
When is eye strain a reason to see an eye doctor?
When it does not ease with rest, or when it comes with other changes. Eye symptoms need an exam, not a supplement.
- Strain, blur or headaches that last after screen breaks.
- Dry, burning or gritty eyes most days (NEI: dry eye).
- No eye exam since 40: the Academy suggests a baseline exam at that age (AAO: how often adults need eye exams).
Sudden floaters, flashes of light or a shadow over your vision can mean retinal detachment, a medical emergency (NEI: urgent warning signs). Go to an eye doctor or emergency room right away.
FAQ
Astaxanthin questions, answered
Does astaxanthin help with eye strain?
It may help a little. Small human studies at 4 or 12 mg a day for 28 days suggested less eyestrain or better focusing, but most evidence is from animals and more randomized trials are needed (Review: astaxanthin and the eye). Screen breaks are the first step for tired eyes (AAO: screen time and eye strain tips).
How much astaxanthin is in VisiFlora?
The amount is not published. The sales page gives an amount for zinc only (11 mg), and the brand's own advertorial confirms no other quantity is disclosed (Brand advertorial, ACCESS Newswire). Check the Supplement Facts panel on your bottle and compare it with the 4 to 12 mg used in studies.
How long does astaxanthin take to work?
The small eye-strain studies ran for 28 days (Review: astaxanthin and the eye). That is the only time frame the research gives, and it comes from short trials. VisiFlora's 60-day money-back window is long enough to cover it, but its astaxanthin amount is unknown.
Does astaxanthin have side effects?
The clinical studies in a 2020 review reported no adverse events (Review: astaxanthin and the eye). They were small and short, so rare or long-term effects are unknown. Tell your doctor and pharmacist about any supplement, because supplements can interact with medicines (NCCIH: using supplements wisely).
Is astaxanthin better than lutein for eyes?
No one can say. Lutein and zeaxanthin were tested in AREDS2 for people with intermediate or late AMD (NEI: AREDS and AREDS2 formula doses), while astaxanthin has only small eye-strain studies (Review: astaxanthin and the eye). They were studied for different goals, so they cannot be ranked against each other.
Can astaxanthin replace the 20-20-20 rule?
No. The 20-20-20 rule is the Academy's main advice for screen strain, and screen eyestrain usually eases with rest (AAO: screen time and eye strain tips). Astaxanthin evidence is early (Review: astaxanthin and the eye). Breaks cost nothing, so start there.
Who wrote this
Written and reviewed by
Plain-language pages built from what the seller publishes and from linked eye-health sources.
Last updated . Read our editorial standards and how we check reviews. This website is run by a USA authorized VisiFlora retailer, not by the manufacturer. We earn money when you buy through our order links.
Keep reading
More about VisiFlora
Astaxanthin
Astaxanthin in VisiFlora: small eye-strain studies, mostly animal research, and an amount the seller does not publish.
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Digital eye strain and 20-20-20
Why screens tire your eyes, how to set up the 20-20-20 rule, and what blue-light filters and capsules can and cannot do.
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How to use
One capsule a day with food: timing, missed capsules, other vitamins and what to track for 60 days.
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