June 14, 2026
My skin is calmer
Within three weeks I already saw a difference — less redness and a natural glow. I take it every morning with breakfast.
100% Organic · Korea
서윤 · Marine antioxidant · 12 mg
Seoyun Astaxanthin 12MG · 30 Capsules
The king of carotenoids
The strongest natural antioxidant ever discovered — 6,000× stronger than vitamin C. One 12 mg softgel a day, from 100% organic Korean microalgae.
Crosses the blood-brain barrier
One of few antioxidants that reaches the brain directly and protects against age-related cognitive decline.
Protects the entire cell membrane
Astaxanthin spans the full width of the cell membrane, protecting both the water- and fat-soluble layers.
Never becomes a pro-oxidant
Unlike beta-carotene or vitamin C in high doses, astaxanthin never flips into a damaging pro-oxidant state.
Works in fat and water
Its unique structure lets it work in both fat- and water-based parts of the cell — full-spectrum protection.
The science
Why astaxanthin works
19%
less wrinkle depth in 12 weeks
The problem
Free radicals from UV light and daily stress break down collagen and speed up visible ageing.
How astaxanthin helps
Astaxanthin works like an internal sunscreen — it protects skin cells from within, stimulates your own collagen and inhibits the enzymes that break it down.
What to expect
Your first three months
One softgel a day. Here's how astaxanthin builds up in your body over time.
2–4 wks
First signs
Eye fatigue eases and daily energy starts to feel steadier.
4–6 wks
Skin hydration
Moisture levels and elasticity visibly improve.
8–12 wks
Fewer wrinkles
Fine lines and wrinkle depth begin to soften.
16 wks
Full protection
Skin is actively shielded against further damage.
One molecule, many benefits
Head-to-toe support
Skin & anti-aging
Supports collagen for firmer, calmer, more radiant skin.
Eyes & screen comfort
Filters blue light and eases tired, dry eyes.
Sport & recovery
Faster muscle recovery and more strength endurance.
Immune support
Strengthens your natural defences in busy periods.
Anti-inflammatory
Acts on eight inflammation markers at the same time.
Heart & circulation
Protects cholesterol and supports healthy blood flow.
Beauty from within
One softgel, felt head to toe
A single 12 mg dose of pure marine astaxanthin, working quietly across your whole body.
01
Brain & focus
Crosses the blood-brain barrier to protect against cognitive decline.
02
Calm, clear eyes
50% fewer eye complaints after just 4 weeks of daily use.
03
Radiant complexion
A natural, healthy glow and warm tone from the inside out.
12 mg · One a day
04
Fewer fine lines
19% less wrinkle depth after 12 weeks of daily use.
05
Hydrated, even skin
23% less moisture loss and 12% more elasticity.
06
Internal UV shield
Protects skin from within against UV and free-radical damage.
Don't just take our word
“My skin feels calmer and looks brighter from within.”
Sanne V. · Verified
“After days of screen work my eyes finally feel rested.”
Julia M. · Verified
“I recover noticeably faster after running.”
Fleur K. · Verified
“A small ritual I no longer want to miss.”
Noor D. · Verified
서윤
“We speak the way a trusted friend would — warm, honest, and never in a rush.”
Softly certain · Never loud
70+
Clinical studies
CO₂
Supercritical extraction
100%
Organic microalgae
서윤
Made in South Korea
Find your ritual
April 30, 2026
Finally rest for my eyes
I work in front of a screen all day. Since Seoyun my eyes feel far less tired by the evening.
March 1, 2026
Quality you can feel
You can tell this is pure. No strange aftertaste, one softgel a day, and my energy is more stable.
February 22, 2026
Faster recovery
As a runner I notice my legs recover faster. I was sceptical, but this really works for me.
February 2, 2026
Lovely ritual
Calm, considered brand and a product that does what it promises. I'd have liked a larger bottle option.
Frequently asked questions
Is Seoyun Astaxanthin natural or synthetic?
100% natural. Our astaxanthin is extracted directly from organic microalgae (Haematococcus pluvialis) — never petroleum-based like synthetic versions.
How much do I take per day?
One 12 mg softgel a day, ideally with a meal that contains some fat for the best absorption.
When can I expect results?
Most women notice eye comfort and steadier energy after 2–4 weeks; skin improvements typically show from week 4–6 and build for months.
Is it safe for long-term use?
Yes. Astaxanthin has been studied for over 20 years with an excellent safety profile — it never becomes a pro-oxidant, even at higher doses.
How fast is delivery?
Orders ship within 24 hours on business days. Subscriptions always ship free.
What is the 90-day guarantee?
Use Seoyun daily for three months — if you see no result at all, we refund you in full. No questions.
The journal
A quiet ritual of renewal
Science, self-care and the quiet power of the sea — for the modern woman.
Read more →The astaxanthin ritual: why timing mattersRead →Why radiant skin starts from withinRead →The science behind 6,000× vitamin CRead →