Astaxanthin in VisiVra: Eye Strain Research and Safety
Astaxanthin is a red carotenoid from microalgae that gives salmon its colour. It has been studied for eye fatigue and ocular health. Here is what the research says.
| At a glance | |
|---|---|
| What it is | A red-orange xanthophyll carotenoid |
| Main source | Microalgae Haematococcus pluvialis; salmon, shrimp, krill |
| Main role | Antioxidant and anti-inflammatory; studied for eye strain |
| Evidence strength | Early and promising; long-term trials needed |
| Safety level | EFSA: up to 8 mg/day from supplements safe for adults |
| Dose in VisiVra | Not disclosed; part of the 351 mg proprietary blend |
| Key caution | Limited data in pregnancy |
What is astaxanthin?
Astaxanthin is a carotenoid pigment produced mainly by microalgae, particularly Haematococcus pluvialis. When shrimp, krill and salmon eat these algae, astaxanthin accumulates in their tissues and gives them their pink-red colour. Supplements are usually made from algae or produced synthetically. Like lutein and zeaxanthin, astaxanthin is a xanthophyll, but it does not concentrate in the macula in the same way.
How astaxanthin might help the eyes
A 2020 review by Giannaccare and colleagues in the journal Marine Drugs summarised the research on astaxanthin and eye health. The authors describe three main biological properties:
- Antioxidant activity: astaxanthin’s molecular structure allows it to span cell membranes and neutralise free radicals on both sides.
- Anti-inflammatory effects: it appears to modulate inflammatory signalling pathways in laboratory models.
- Anti-apoptotic effects: it may reduce programmed cell death under stress conditions.
The review reports potential benefits, from both animal and human studies, for retinal diseases, ocular surface disorders, uveitis, cataract and asthenopia (eye strain).
Astaxanthin and eye strain
Eye strain is the area most relevant to VisiVra’s claim of helping eyes “adapt to daily strain”. Several small trials, mostly from Japan, have examined astaxanthin in people who do a lot of close-up or computer work, measuring subjective eye fatigue and the eye’s ability to adjust focus (accommodation). Results have been generally encouraging, but the studies tend to be small and short.
The Marine Drugs review concludes that long-term clinical trials are still needed to establish the appropriate dosage, route of administration and composition of astaxanthin products. In other words, the evidence is promising but not yet conclusive.
Remember: Eye strain from screens usually improves with simple habits: the 20-20-20 rule, conscious blinking, a screen at arm’s length and good lighting. These steps are recommended by the American Academy of Ophthalmology and cost nothing. See our eye strain guide.
How much astaxanthin is studied?
Eye-strain studies have commonly used doses in the range of a few milligrams to around 12 mg a day. For safety, the European Food Safety Authority (EFSA) concluded that intake of up to 8 mg a day from food supplements, combined with astaxanthin from the background diet, is safe for adults.
| Reference point | Amount |
|---|---|
| EFSA safe level for adults (supplements) | Up to 8 mg/day |
| VisiVra | Not disclosed (in 351 mg blend) |
Safety and side effects
Astaxanthin is generally well tolerated. At higher intakes some people notice a reddish tint to the skin or stool, which is harmless. Because research in pregnancy and breastfeeding is limited, pregnant and nursing women should avoid supplements without medical advice. Astaxanthin is fat-soluble and is best taken with a meal containing some fat. We did not find well-established drug interactions in the sources reviewed, but as with any supplement, tell your doctor what you take.
Natural versus synthetic astaxanthin
Astaxanthin in supplements can come from Haematococcus pluvialis microalgae or be made synthetically. Synthetic astaxanthin is widely used in fish farming, while supplements for people more often use algae-derived astaxanthin. The two differ slightly in their chemical forms, and most human eye research has used algae-derived products. The VisiVra label lists astaxanthin without stating its source.
Astaxanthin’s role in VisiVra
Astaxanthin is the ingredient most closely linked to VisiVra’s eye-strain claims. It is a reasonable addition with intriguing early research and a good safety profile up to 8 mg a day. In VisiVra it is part of the 351 mg proprietary blend, so its amount, and therefore its likely effect, is unknown.
Who should be cautious with astaxanthin?
Pregnant and breastfeeding women, children, and people with a medical condition or on long-term medication should check with a healthcare professional before taking astaxanthin supplements, simply because there is little research in these groups.
Food sources
Wild salmon, trout, shrimp, krill and lobster contain astaxanthin. Eating oily fish also provides omega-3 fatty acids, which the CDC and National Eye Institute recommend as part of an eye-friendly diet.
Bottom line
Astaxanthin is a powerful antioxidant carotenoid with promising but early evidence for eye fatigue. It appears safe at up to 8 mg a day for adults. It strengthens VisiVra’s formula on paper, but more and longer human trials are needed before firm conclusions can be drawn.
Frequently asked questions
Does astaxanthin help eye strain?
Small trials suggest it may reduce eye fatigue, and a 2020 review calls the results promising, but longer, larger trials are needed.
How much astaxanthin is safe?
The European Food Safety Authority considers up to 8 mg a day from supplements safe for adults.
Does astaxanthin turn your skin orange?
At high intakes some people notice a slight tint to the skin. It is harmless and reversible.
Sources
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Read our medical disclaimer.