🇰🇷 Korean Supplement Science
Supplements that
actually work.
Clinically dosed formulas from South Korea. No fillers, no underdosing — only active ingredients your body deserves.
PFAS-free
GMP Certified
3rd Party Tested
90-Day Guarantee
🧪
Lab Verified
🌿
100% Natural
🇰🇷
Korean Sourced
🛡️
Money-Back Guarantee
🚫
No Fillers
🧪
Lab Verified
🌿
100% Natural
🇰🇷
Korean Sourced
🛡️
Money-Back Guarantee
🚫
No Fillers
Clinically Dosed
Korean Wellness
No Underdosing
90-Day Guarantee
PFAS-free
3rd Party Tested
GMP Certified
Clinically Dosed
Korean Wellness
No Underdosing
90-Day Guarantee
PFAS-free
3rd Party Tested
GMP Certified
Our Philosophy
Not more.
Not less.
Only what works.
In South Korea, supplements are taken seriously. No marketing doses, no fancy packaging hiding empty promises. At Seoyun we formulate every capsule based on clinical studies — with the dosages that actually deliver results.
6000×
Stronger than Vitamin C
12mg
Clinical dosage
22
Scientific formulas
90
Day money-back
Our Formulas
Choose your stack
Bestseller
Antioxidant
Astaxanthin
The most powerful antioxidant on earth. 6000× stronger than vitamin C. Clinically dosed at 12mg.
New
Vitamins
Seoyun Pumpkin Seed Oil
1000mg pumpkin seed oil per softgel. Supports prostate, bladder and overall health.
Vitamins
Seoyun Oil of Oregano
6000mg oregano oil with black seed oil. Supports immunity and overall wellness.
Minerals
Magnesium Complex
The most bioavailable form of magnesium. Supports sleep, muscles and nervous system.
New
Vitamins
Ashwagandha
Ashwagandha with MCT oil for improved absorption. Supports stress balance & focus.
Vitamins
Saffron+ Advanced
Saffron formula for mood, energy and daily balance. Supports overall well-being.
Why 서윤
What makes us different
🧬
Clinical Dosages
Every formula contains the exact dosage from clinical studies. No marketing doses.
🇰🇷
Korean Sourced
Our ingredients come directly from specialized Korean suppliers.
🔬
3rd Party Tested
Independently tested for purity, heavy metals and label accuracy by external labs.
🛡️
90-Day Guarantee
No results after 8 weeks? Full purchase price refunded. No questions, no hassle.
The Science
Formulated by science,
not by marketing.
Most supplement brands choose their dosages based on price. We choose them based on clinical studies. The difference? Results you can feel.
12mg
Astaxanthin — Most brands dose at 4-6mg. The studies showing results use 12mg. So do we.
rTG
Omega-3 form — Re-esterified triglyceride is absorbed 3× better than standard ethyl ester form.
MK-7
Vitamin K2 variant — MK-7 has a half-life of 72 hours vs. 2 hours for MK-4. Effective for longer.
How It Works
4 steps to results
1
Choose your formula
Pick individual products or build your own stack based on your health goals.
2
Take with breakfast
Take your capsules with breakfast and a glass of water. Fat-soluble formulas with a fatty meal.
3
Be consistent
Most clinical studies measure at 4-8 weeks. Consistency is the key to results.
4
Feel the difference
More energy, better skin, deeper sleep. Not satisfied? 90-day money-back.
90-Day Money-Back Guarantee
It works.
Or your money back.
No results after 8 weeks of consistent use? We'll refund your full purchase price. No questions asked. That's how much confidence we have in our formulas.
Order now with guarantee →