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TL; DR
Astaxanthin for eyes may help reduce eye fatigue, support dry eye relief, and protect long-term vision, especially for screen users and those concerned about aging eye health. |
Nobody talks about eye health until their vision starts changing. By then, years of screen exposure, oxidative stress, and aging have already been quietly doing their work.
Dry eyes, fatigue, blurry vision; these aren't just screen problems. They're signs your eyes need more support than a screen break can offer.
This is where astaxanthin for eyes has been attracting growing research attention. It’s a natural antioxidant that works from within to support both daily visual comfort and long-term eye protection.
In this blog, we cover what's really happening, what habits help, and how astaxanthin fits into a practical approach to eye health at every age.
Eye Strain, Screens and Aging: What's Really Hurting Your Eyes?
Screen usage strains your eyes in real time and aging compounds that strain over the years. Together, they create more pressure on your eyes than most people realize.
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Daily Screen Use and Eye Strain
Here are a few key factors that work together and slowly lead to discomfort over time.
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Reduced blinking and dryness: When you focus on a screen, your blink rate naturally drops. This means your eyes aren't getting enough moisture, which can lead to dry and irritated eyes.
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Continuous focus and eye muscle fatigue: When you spend long periods looking at screens, your eyes remain focused at a close distance. This keeps the ciliary muscle continuously engaged to maintain focus. Over time, this sustained effort can contribute to eye fatigue, discomfort, and temporary difficulty shifting focus between near and distant objects.
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Blue light and visual stress: Digital screens and LED lighting emit blue light, short wavelength high energy light that increases oxidative stress in the retina with prolonged exposure. Glare and poor contrast add to this, making your eyes work harder than they need to.
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Natural Aging
As we age, years of exposure to sunlight, artificial light, pollution, and environmental stressors quietly build up oxidative stress in the eyes. Over time, this raises the risk of conditions like cataracts and age-related macular degeneration.
Eye Strain Symptoms: What Your Eyes Are Trying to Tell You
Eye strain or digital eye strain can show up in different ways. It often starts subtly before becoming more noticeable with continued screen use. Here are some common symptoms to look for:
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Dry or irritated eyes: A gritty, uncomfortable feeling that often reduces after long screen time.
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Headaches around the eyes or forehead: A dull pressure that builds after prolonged screen use.
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Blurred or unstable vision: Vision may look blurry, especially after switching from the screen to distance.
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Eye fatigue or heaviness: Your eyes feel tired even without physical effort, especially after long work or study sessions.
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Increased sensitivity to light: Bright lights or screens feel more uncomfortable than usual, particularly towards the end of the day.
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Gradual changes in vision sharpness: Often dismissed as tiredness, but worth monitoring, especially as we get older.
How to Relieve Eye Strain from Screens
Small, consistent adjustments in how you use screens can make a real difference. Here are some that work:
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The 20-20-20 Rule: The Simplest Fix for Screen Fatigue
A simple and well-known guideline for screen users is the 20-20-20 rule. Every 20 minutes, look at something 20 feet away for at least 20 seconds. This helps reset the eye's focusing system and gives the ciliary muscle a chance to relax.
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Adjust Your Screen Setup
Small positioning changes can make a big difference over time.
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Keep the screen slightly below eye level.
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Maintain an arm's length of distance.
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Reduce glare from windows or overhead lights.
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Natural Blinking
Screen use often reduces blinking without you noticing. Try consciously blinking more during long tasks, especially when reading or typing. This helps maintain moisture and reduces that dry, gritty feeling.
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Reduce Visual Overload
Too much brightness or contrast forces your eyes to work harder than necessary.
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Match screen brightness with room lighting.
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Use night mode in low light environments.
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Avoid working in completely dark rooms with bright screens
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Give Your Eyes Recovery Time
Your eyes recover during rest, not during continued exposure. This applies to both screen fatigue and the general tiredness that comes with aging eyes. So, give them time to recover without a screen.
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Try no-screen time in the evenings.
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Set short screen-free breaks during the day.
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Allow your eyes proper rest overnight. Quality sleep matters for eye recovery
Habits go a long way. But they only address what happens outside. What your eyes need from the inside is a different conversation.
This is where astaxanthin for eyes enters the picture. It’s a natural antioxidant that has been getting serious research attention for its role in eye comfort and long-term vision protection.
Astaxanthin and Eye Health: What Sets It Apart
Astaxanthin is a naturally occurring carotenoid. It’s the same pigment that gives wild salmon, shrimp, and certain algae their deep red and pink color. Its richest natural source is a freshwater microalgae called Haematococcus pluvialis.
Why It Stands Out Among Antioxidants
Astaxanthin is often called the King of Carotenoids. Here’s why:
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Roughly 10x more potent than beta-carotene in free radical inhibition. 1
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Up to 500x more potent than Vitamin E in singlet oxygen quenching. 2
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Unlike most antioxidants, it does not convert into a pro-oxidant after neutralizing free radicals. Meaning it keeps working without causing further damage 3
Why Astaxanthin Matters Specifically for Eyes
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Fat-soluble: Reaches and gets stored directly in eye cell membranes, where it’s needed the most.4
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Crosses the blood-retinal barrier: It is one of the very few antioxidants that can do this. Meaning it reaches retinal tissues directly, where oxidative damage from screens and aging actually occurs. 5
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Works inside and outside cells: Most antioxidants work in only one location. Astaxanthin neutralizes free radicals across both layers of cell membranes simultaneously, giving it a broader protective reach.6
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Anti-inflammatory: It goes beyond antioxidant action to help reduce inflammation in eye tissues, supporting immediate comfort and long-term protection.
Astaxanthin Benefits for Eyes: What the Research Shows
Astaxanthin's growing interest in eye health isn't just about its antioxidant strength. It's about where it works and how it works. It works directly inside eye tissues, where both daily screen stress and long-term aging-related damage occur. Here is what the research points to.
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Reduces Eye Fatigue
Prolonged screen use keeps the ciliary muscle (responsible for focusing) under constant tension. This is a key reason eyes feel heavy and strained by the end of day.
Astaxanthin may help relax this muscle and support blood flow in retinal capillaries, allowing the eye to recover more effectively. Human studies have shown improvements in accommodation, the eye's ability to shift focus, which is closely linked to reduced visual fatigue.
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Supports Blood Flow in the Eyes
Good circulation in the eye capillaries delivers nutrients, removes waste, and supports overall visual performance. Some studies 7 suggest astaxanthin may help support ocular blood flow.
One four-week study showed significant improvement in capillary circulation among participants, with no adverse effects reported.
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Helps Manage Oxidative Stress
Screen exposure and aging both drive oxidative stress in eye tissues. Astaxanthin has shown strong activity in reducing this internal stress load. It has also been shown to trigger natural defense proteins that support other antioxidants in the eye.
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Supports Dry Eye Relief
In an eight-week study, participants taking astaxanthin showed significant improvement in tear production and stability, alongside reduced inflammation on the ocular surface. This suggests that astaxanthin works at a deeper level than surface drops alone.
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Supports Retinal Health and Visual Acuity
Astaxanthin crosses the blood-retinal barrier, reaching retinal cells directly. Research suggests that it may support visual acuity and contrast sensitivity.
In a 12-month study on patients with macular degeneration, those taking astaxanthin showed significant improvements in central retinal function at both six and twelve months.
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May Help Protect Against Optic Nerve Damage
Glaucoma damages the optic nerve over time, often due to elevated pressure inside the eye. Astaxanthin has been shown to reduce retinal ganglion cell death, a key factor in the progression of glaucoma-related retinal damage. 8
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May Help Reduce Retinal Cell Damage in Diabetics
Diabetic retinopathy is one of the leading causes of vision loss in adults with diabetes. A key driver is the accumulation of advanced glycation end products (AGEs) in retinal cells.
Studies suggest astaxanthin may help inhibit AGE formation and reduce oxidative stress in retinal tissue, making it a potentially useful addition to a broader eye health strategy for those at risk9
Astaxanthin and Eye Health: Evidence Table
Research on astaxanthin and eye health has grown considerably over the past two decades. Here is a snapshot of some key studies and what they found:
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Study |
Participants |
Dose & Duration |
Key Finding |
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Eye Strain & Accommodation 10 |
Healthy screen users |
6mg / 4 weeks |
Improved accommodation and reduced visual fatigue |
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Ocular Blood Flow RCT 11 |
20 healthy volunteers |
12mg / 4 weeks |
Significant improvement in capillary blood circulation in the eyes |
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Macular Degeneration Study 12 |
27 AMD patients |
12 months |
Significant improvements in central retinal function at 6 and 12 months |
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Eye Strain RCT 13 |
48 subjects, aged 45–64 |
Astaxanthin + lutein / 4 weeks |
Higher near-point accommodation scores, reduced eye fatigue symptoms |
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Dry Eye Study 14 |
Screen users |
8 weeks |
Improved tear production and stability, reduced inflammation and oxidative stress |
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Cataract Study 15 |
35 patients pre-surgery |
6mg / 2 weeks |
Boosted superoxide scavenging activity, reduced oxidative stress markers |
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Glaucoma Study (Preclinical) 8 |
Rat model, elevated eye pressure |
Not specified |
Lower retinal protein oxidation and reduced cell death vs control group |
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Diabetic Retinopathy Study 9 |
Human retinal cells (in vitro) |
Not specified |
Inhibited AGE formation, reduced ROS and oxidative stress in retinal cells |
What the research consistently shows is that astaxanthin supports eye health through multiple pathways. Benefits have been observed across doses of 6-12mg daily, with most studies running between four weeks and twelve months.
Other Nutrients That Support Eye Health
Astaxanthin plays a targeted role in eye health. But it works best as part of a broader nutritional approach. A few other nutrients are worth knowing about, let’s take a closer look.
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Lutein and Zeaxanthin
These carotenoids are naturally present in the retina. And are well known for filtering high-energy light, including blue light from screens. Each absorbs slightly different wavelengths and is distributed in different parts of the eye. 16 17
They can:
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Help reduce light-related stress from screens.
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Support visual clarity and contrast.
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Contribute to long-term retinal protection.
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Omega-3 Fatty Acids
Omega-3s support the eye surface and are particularly useful for dryness linked to screen use. 18 19 They can:
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Help maintain tear film stability.
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Reduce that dry, irritated, or watery feeling that builds through the day.
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Support overall ocular surface comfort
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Vitamins C, E and Beta-Carotene
These well-established antioxidants support the eye's broader defense system. 20 They can:
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Help protect the lens and retinal cells from oxidative damage.
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Support the eye's overall antioxidant defense alongside other nutrients
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Work alongside astaxanthin and carotenoids for broader coverage
The Combined Role of Nutrients in Eye Strain Relief
|
Nutrient |
Key Benefit |
Best For |
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Astaxanthin |
Eye fatigue, oxidative stress, blood flow |
Screen users, aging eyes |
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Lutein & Zeaxanthin |
Filters blue light, visual clarity |
Retinal protection |
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Omega-3s |
Tear film stability |
Dry, irritated eyes |
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Vitamin C & E |
Antioxidant lens protection |
General eye health |
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Beta-Carotene |
Broad antioxidant defense |
Complementary use |
Astaxanthin Dosage for Eyes: How Much Should You Take?
If you're considering astaxanthin for eye health, a few practical points are worth knowing before you start.
How Much to Take
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Most human studies have used daily doses in the 4-12mg range.
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A common effective range for eye-related benefits sits around 4-8mg per day.
Natural vs Synthetic Astaxanthin
Always choose natural astaxanthin derived from Haematococcus pluvialis microalgae. Natural astaxanthin has significantly better bioavailability than synthetic forms.
How to Take and Choose Astaxanthin
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Take with a meal containing healthy fats. Astaxanthin is fat-soluble and absorbs best this way.
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Use it as consistent, long-term support, not a quick fix.
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Give it at least 4-8 weeks before evaluating results.
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Combine with good screen habits and a balanced diet for best results.
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Look for products with clear labeling of source and strength.
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Avoid formulas with unnecessary additives or unclear ingredient details
Safety and Precautions
Astaxanthin is generally well-tolerated at typical supplemental doses. However:
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It may interact with certain medications. Inform your doctor before starting.
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Consult a healthcare professional if pregnant or breastfeeding.
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Those with known allergies to seafood or algae should exercise caution.
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If you have an existing eye condition, speak to your doctor first.
Who May Benefit Most from Astaxanthin for Eye Health
You may benefit most if:
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You spend most of your day on screens and your eyes feel tired by evening.
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Your eyes struggle to refocus when switching between devices and distance.
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Breaks help, but the strain keeps coming back.
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You've improved screen habits but still notice lingering fatigue.
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You experience dry, irritated eyes regularly, especially after long screen sessions
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You are in your 30s or beyond and want to take a proactive approach to aging eye health.
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You are looking for a natural, research-backed addition to your existing eye health routine.
Final Takeaway: A Practical Approach to Eye Strain
Protecting your eyes gets easier when you stop looking for quick fixes and start building consistent habits instead. Begin with the basics; screen breaks, better lighting, and conscious blinking.
If the strain keeps coming back, your eyes are probably telling you they need more support than that.
Pair it with the right nutrients, get your eyes checked regularly, and don't wait for things to get worse before paying attention.
Frequently Asked Questions
Q1. Does astaxanthin help with eye strain from screens?
Some studies in screen users suggest astaxanthin may help support eye fatigue and focusing ability. It works by targeting internal factors like oxidative stress and ciliary muscle fatigue, not just surface symptoms. 10
Q2. Is astaxanthin good for eye health?
Yes, research suggests it may support multiple aspects of eye health, from reducing daily eye fatigue and dryness to protecting retinal cells from oxidative damage over time. It is one of the few antioxidants that crosses the blood-retinal barrier directly.
Q3. What does astaxanthin do for your eyes?
It works on several levels. It helps in relaxing the ciliary muscle, supporting ocular blood flow, reducing oxidative stress in eye tissues, and helping maintain tear film stability. Together, these effects support both everyday visual comfort and longer-term eye protection.
Q4. What are the benefits of astaxanthin vision?
Research points to improvements in accommodation, visual acuity, and contrast sensitivity, particularly after prolonged screen use. Longer-term studies also suggest benefits for retinal health and conditions like macular degeneration.
Q5. How does astaxanthin protect aging eyes?
As we age, oxidative stress builds in eye tissues over time, increasing the risk of conditions like cataracts, macular degeneration, and glaucoma. Astaxanthin's antioxidant and anti-inflammatory properties may help slow this process by protecting retinal and lens cells from cumulative damage.
Q6. Does astaxanthin help dry eyes naturally?
It may. In an eight-week study, participants taking astaxanthin showed significant improvements in tear production and stability, alongside reduced inflammation on the ocular surface. It works differently from eye drops. It addresses the underlying oxidative stress rather than just relieving surface dryness.
Q7. Can Astaxanthin help with eye floaters ?
Eye floaters are typically caused by changes in the vitreous humor of the eye. While astaxanthin's antioxidant properties may support general eye health, there is currently limited direct research specifically on astaxanthin and eye floaters. If floaters are persistent or sudden, consult an eye care professional.
Q8. Is astaxanthin available as eye drops?
Astaxanthin is currently most widely available as an oral supplement. While research into topical applications is ongoing, oral supplementation is the form studied and supported by current evidence for eye health benefits.
Q9. How much astaxanthin should I take for eye health?
Most studies have used doses in the 4-12mg daily range. A common starting point is 4-8mg per day, taken with a meal containing healthy fats for better absorption. Give it at least 4-8 weeks before evaluating results.
Q10. Are there any side effects of astaxanthin?
Astaxanthin is generally well-tolerated. Some people report mild side effects like skin yellowing or changes in stool color at higher doses. These are typically harmless and dose-dependent.
Q11. Who should avoid taking astaxanthin?
Those who are pregnant, breastfeeding, or on blood-thinning or hormone-related medications should consult a doctor before use. People with shellfish or algae allergies should also exercise caution.
Q12: Can astaxanthin be taken alongside prescription eye medications?
Astaxanthin is a nutritional supplement, not a medication. However, if you are on prescription eye medications or any other drugs, check with your doctor first as interactions are possible.
References:
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Bjørklund, G., Gasmi, A., Lenchyk, L., Shanaida, M., Zafar, S., Mujawdiya, P. K., ... & Peana, M. (2022). The role of astaxanthin as a nutraceutical in health and age-related conditions. Molecules, 27(21), 7167. https://pmc.ncbi.nlm.nih.gov/articles/PMC9655540/
-
Donoso, A., González-Durán, J., Muñoz, A. A., González, P. A., & Agurto-Muñoz, C. (2021). Therapeutic uses of natural astaxanthin: An evidence-based review focused on human clinical trials. Pharmacological Research, 166, 105479. https://www.sciencedirect.com/science/article/abs/pii/S1043661821000633
-
Yamashita, E. (2015). Let astaxanthin be thy medicine. PharmaNutrition, 3(4), 115-122. https://www.sciencedirect.com/science/article/abs/pii/S2213434415000262
-
Ambati, R. R., Phang, S. M., Ravi, S., & Aswathanarayana, R. G. (2014). Astaxanthin: Sources, extraction, stability, biological activities and its commercial applications—A review. Marine drugs, 12(1), 128-152. https://pmc.ncbi.nlm.nih.gov/articles/PMC3917265/
-
Xu, L., Yu, H., Sun, H., Yu, X., & Tao, Y. (2019). Optimized nonionic emulsifier for the efficient delivery of astaxanthin nanodispersions to retina: in vivo and ex vivo evaluations. Drug Delivery, 26(1), 1222-1234. https://pmc.ncbi.nlm.nih.gov/articles/PMC6882443/
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Nishida, Y., Nawaz, A., Hecht, K., & Tobe, K. (2021). Astaxanthin as a novel mitochondrial regulator: a new aspect of carotenoids, beyond antioxidants. Nutrients, 14(1), 107. https://pmc.ncbi.nlm.nih.gov/articles/PMC8746862/
-
Keily, S., & Cysewski, G. R. (2010). The Medical Research of Astaxanthin Eye Health. https://www.cyanotech.com/pdfs/bioastin/Abstracts-Eye_Health_GC_2.pdf
-
Kikuchi, K., Dong, Z., Shinmei, Y., Murata, M., Kanda, A., Noda, K., ... & Ishida, S. (2020). Cytoprotective effect of astaxanthin in a model of normal intraocular pressure glaucoma. Journal of Ophthalmology, 2020(1), 9539681. https://pmc.ncbi.nlm.nih.gov/articles/PMC7520698/
-
Yang, M., & Wang, Y. (2022). Recent advances and the mechanism of astaxanthin in ophthalmological diseases. Journal of Ophthalmology, 2022, Article 8071406. https://onlinelibrary.wiley.com/doi/10.1155/2022/8071406
-
Sekikawa, T., Kizawa, Y., Li, Y., & Miura, N. (2022). Effects of diet containing astaxanthin on visual function in healthy individuals: a randomized, double-blind, placebo-controlled, parallel study. Journal of clinical biochemistry and nutrition, 72(1), 74. https://pmc.ncbi.nlm.nih.gov/articles/PMC9899915/
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Saito, M., Yoshida, K., Saito, W., Fujiya, A., Ohgami, K., Kitaichi, N., ... & Ohno, S. (2012). Astaxanthin increases choroidal blood flow velocity. Graefe's archive for clinical and experimental ophthalmology, 250(2), 239-245. https://link.springer.com/article/10.1007/s00417-011-1843-1
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Parisi, V., Tedeschi, M., Gallinaro, G., Varano, M., Saviano, S., Piermarocchi, S., & CARMIS Study Group. (2008). Carotenoids and antioxidants in age-related maculopathy italian study: multifocal electroretinogram modifications after 1 year. Ophthalmology, 115(2), 324-333. https://www.sciencedirect.com/science/article/abs/pii/S0161642007005817
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Stringham, J. M., Stringham, N. T., & O’Brien, K. J. (2017). Macular carotenoid supplementation improves visual performance, sleep quality, and adverse physical symptoms in those with high screen time exposure. Foods, 6(7), 47. https://www.mdpi.com/2304-8158/6/7/47
-
Huang, J. Y., Yeh, P. T., & Hou, Y. C. (2016). A randomized, double-blind, placebo-controlled study of oral antioxidant supplement therapy in patients with dry eye syndrome. Clinical Ophthalmology, 813-820. https://www.tandfonline.com/doi/pdf/10.2147/OPTH.S106455
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Naguib, Y. M. A. (2000). Antioxidant activities of astaxanthin and related carotenoids. Journal of Agricultural and Food Chemistry, 48(4), 1150–1154. https://pubs.acs.org/doi/10.1021/jf991106k
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Bernstein, P. S., Delori, F. C., Richer, S., van Kuijk, F. J., & Wenzel, A. J. (2010). The value of measurement of macular carotenoid pigment optical densities and distributions in age-related macular degeneration and other retinal disorders. Vision research, 50(7), 716-728. https://pmc.ncbi.nlm.nih.gov/articles/PMC2840187/
-
Stringham, J. M., Stringham, N. T., & O’Brien, K. J. (2017). Macular carotenoid supplementation improves visual performance, sleep quality, and adverse physical symptoms in those with high screen time exposure. Foods, 6(7), 47. https://pubmed.ncbi.nlm.nih.gov/28661438/
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Downie, L. E., Ng, S. M., Lindsley, K. B., & Akpek, E. K. (2019). Omega-3 and omega-6 polyunsaturated fatty acids for dry eye disease. Cochrane Database of Systematic Reviews, 2019(12), Article CD011016 https://www.cochrane.org/evidence/CD011016_omega-3-and-omega-6-polyunsaturated-fatty-acid-supplements-dry-eye-disease
-
Deinema, L. A., Vingrys, A. J., Wong, C. Y., Jackson, D. C., Chinnery, H. R., & Downie, L. E. (2017). A randomized, double-masked, placebo-controlled clinical trial of two forms of omega-3 supplements for treating dry eye disease. Ophthalmology, 124(1), 43-52. https://www.aaojournal.org/article/S0161-6420(16)31373-2/fulltext
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Johra, F. T., Bepari, A. K., Bristy, A. T., & Reza, H. M. (2020). A mechanistic review of β-carotene, lutein, and zeaxanthin in eye health and disease. Antioxidants, 9(11), 1046. https://www.mdpi.com/2076-3921/9/11/1046
Disclaimer: This article is for informational purposes only and is not intended to replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider regarding any medical concerns or conditions.
