Description
How It Works
Collect.
Adhere a non-invasive adhesive to your skin.
Mix.
Add a few drops of color reaction liquid.
Scan.
Take a photo with our web app for immediate results.
Go beyond your birth age.
Know Your Real Skin Age
Instantly measure your skin’s true biological age and aging velocity using real molecular biomarkers — revealing what your skin’s appearance can’t tell you.
Design a regimen around your skin’s real biology
From Results to Routine, Perfectly Matched
Your analysis reveals your skin’s biological age profile, then recommends the most effective products and regimen to optimize your age-defying outcomes over time.
From molecular signals to measurable age
How Your Skin’s True Age Is Revealed
The test reads key molecules that control your skin’s renewal and repair activity, then calculates a Skin Epigenetic Hydroxylation Incompetence (SEHI) score showing how well your skin is aging. A higher score means faster aging—so you can understand, track, and improve your skin’s health over time.
Hear It From Your peers
What Others Are Saying
I thought I was too far gone for any anti-aging product to work. But this serum proved me wrong. Noticed less puffiness and smoother skin around my eyes. Feels like a mini facelift without the surgery.
It soaks into my skin so fast, no greasiness at all, and my face feels so soft after. I've had stubborn dry patches forever, and they're completely gone now. My go-to for dry weather, for sure.
I've struggled to find a good moisturizer for YEARS and this lotion is a dream come true. It's light enough to wear under my makeup, and my skin stays hydrated all day. I use to get dry patches around my nose but they're completely gone now!!! My face just feels sooooo comfy and looks dewy.
It sinks in beautifully and doesn’t make me feel greasy. I look more rested and less "tired." My daughter said my skin looked "glowy" last weekend - I'll take it.
Frequently Asked Questions
What is biological skin age?
Your biological skin age reflects the true condition of your skin cells, collagen, hydration, and repair capacity—not just the number of candles on your cake. While your chronological age moves at a steady pace, your biological skin age can speed up or slow down depending on epigenetics, lifestyle, and skincare choices. Understanding this age—and whether you’re experiencing accelerated skin aging—is the key to building skincare that truly works for you.
What is the major advantage of using the rapid Skin Aging Self-Test?
The rapid Skin Aging Self-Test uses noninvasive sampling and smart molecular analysis to evaluate your skin’s epigenetic health—essentially reading your Skin Epigenetic Hydroxylation Incompetence (SEHI) score, which reflects how your skin is aging at the biological level. No special equipment is needed. This affordable test can be performed by yourself in the comfort of your own home, and allows you to discover your true biological skin age in just 5 minutes. It helps you select the best-suited, age-segmented skincare products. The Skin Age Self-Test is comparable to—or even superior to—the gold-standard DNAm Age assay (an epigenetic assay with potential clinical applications), as it is built on functional demethylation downstream effectors, not static methylation markers.
What is the scientific basis of the test?
The rapid Skin Aging Self-Test measures your skin’s epigenetic health through noninvasive sampling and molecular analysis of the SEHI (Skin Epigenetic Hydroxylation Incompetence) score. SEHI reflects your skin’s declining ability to maintain proper DNA hydroxylation and epigenetic balance.
In simpler terms, it measures how efficiently your skin cells can “reset” themselves after exposure to stressors such as UV light, pollution, or lifestyle habits. When this function weakens, your biological skin age begins to accelerate—resulting in visible signs of aging like dryness, loss of elasticity, uneven tone, and wrinkles beyond your actual years.
What information will I learn from this test?
After testing, you will receive the following insights:
- Your Skin Age or Biological Age Segment – how biologically old your skin behaves
- Your Accelerated Aging Level – how fast your skin is aging compared to healthy norms
- Your Aging-Associated Skin Quality – how well your skin maintains hydration, elasticity, and antioxidation
These results help you understand whether your skin is aging at a healthy pace or in a “fast-aging” mode that needs urgent correction.
Why should I regularly check my skin age status?
Regularly checking your skin age reveals how fast your skin is truly aging—beyond what you can see in the mirror. It helps you detect early changes, adjust skincare effectively, and track real improvements. With SEHI-based skin age testing, you can manage—not guess—your biological aging and care for your skin in the most suitable way to help keep it youthful longer.
Why is this test the best tool to help reset your skin to a healthy aging pace?
In the world of skincare, one-size-fits-all solutions no longer make sense. Your skin’s needs are unique—not only because of your chronological age, but also because your biological skin age and accelerated aging level evolve over time. The SEHI-based skin aging self-test is revolutionizing how we understand, track, and care for our skin—helping you move beyond guesswork into true personalization. Knowing your SEHI-based skin age transforms how you choose skincare. Instead of relying on marketing claims or generic “anti-aging” labels, you can select products precisely targeted to your biological needs. If your SEHI score shows early-stage imbalance, you may only need antioxidant or barrier-strengthening care. If your score indicates deep hydroxylation dysfunction, GTA (Golden Triple Actives) age-segmented skincare products from Idunn’s Apple—which reactivate epigenetic hydroxylation—can help reset your skin to a healthy aging pace.
Already Know Your Skin Age?
Shop by Your Skin Age
Inside the Lab
Insights From Our Scientists
Citations:
- Sin SH et al: Skin aging from mechanisms to interventions: focusing on dermal aging. Front Physiol, 2023.
- Shen X et al: Nonlinear dynamics of multi-omics profiles during human aging. Nature Aging, 2024.
- Ding Y et al: Comprehensive human proteome profiles across a 50-year lifespan reveal aging trajectories and signatures. Cell, 2025.
- Horvath S et al: Epigenetic clock for skin and blood cells applied to Hutchinson Gilford Progeria Syndrome and ex vivo studies. 2018.
- Boroni M et al: Highly accurate skin-specific methylome analysis algorithm as a platform to screen and validate therapeutics for healthy aging. Clin Epigenetics, 2020.





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