




LAST CALL
24-hour special
Last day to redeem your gift
FROM ONSEN TO OUR LABS
Working with leading scientists, we discovered a fermentation process that transforms moor onsen water into an organic compound of skin-renewing acids called BIYUSEN™. This complex is clinically proven to restore skin to its healthiest state.

Fulvic acid
Enhances your skin’s natural defense mechanism as it is a powerful anti-oxidant. It also helps the absorption of oxygen and water.

Humic acid
Lengthens the life of hyaluronic acid molecules. This keeps the skin’s moisture level as high as possible and slows down wrinkle formation.

Hymatomelanic acid
Smooths and heals skin texture and accelerates the healing of superficial micro-wounds as well as cell renewal.
“A personalised high-performance skincare solution unique to every complexion is freely yours to experience.”
Visible Results After 28 Days
Based on a 4-week clinical trial of 35 subjects aged 21 - 59
Healthy Glowy Skin Starts Here
⭐⭐⭐⭐⭐ 4.7/5 (800+ happy customers)
FAQs
How does the trial work?
Simply enter your email and proceed to claim your free mini-sized serum of choice. You will be led to the checkout page to enter your shipping details. All you need to pay for is the shipping fee and you're set to receive your trial serum.
Have more questions? Email us directly at shop@irenshizen.com and we'll reply within 3 working days.
How long should the trial serum last?
Most customers get 1-2 weeks of use. Depending on recommended use frequency, some products may last longer than others. Our recommend use: Once in the morning and once at night after cleansing or/and toning face.
Do I receive special perks?
Definitely. If you've signed up to claim your free 7-day serum trial, you'll also receive a special discount code to purchase our full-sized serums at 10% off.
Have more questions? Email us directly at shop@irenshizen.com and we'll reply ASAP.
Is this a subscription?
Our serum trial is not a subscription box. It is a one-time purchase to sample our serum.
Are your products safe for sensitive skin?
We do not use any ingredients that are toxic, comedogenic or harmful to your skin. We have blacklisted more than 2000 "toxic" ingredients and base our formulations on factual evidence, using natural botanicals and plant-based actives as our primary formulation.
Are your products vegan / tested on animals?
All our products are certified vegan and creulty-free. We do not use ingredients derived from animals, nor do we/our chain of production, conduct any animal-testing.