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Japanese Longevity Research to Help Skin Perform at Its Best.

Built on Science, not Shortcuts.

Japanese Longevity Research to Help Skin Perform at Its Best.

25+ years of longevity science research. Japan's approach to aging skin—now available in the US.

The Research Foundation

SCIENCE-FIRST SKINCARE

The Research Foundation

Thinking differently has been a core of Otsuka since the company’s beginning nearly a century ago, when Busaburo Otsuka formed a company (Otsuka Seiyaku Kogyo-bu). Since 1921, Otsuka has expanded to nearly 174 factories and 46 research institutes around the world.

About Us

Where Japanese skin science approaches Visible Skin aging differently:

THE INNERSIGNAL DIFFERENCE

An Ingredient the Skincare Industry Has Never Seen.

Energy Signal AMP (INCI: Disodium Adenosine Phosphate) is a naturally occurring nucleotide to support skin's energy and the natural renewal cycle - promoting rejuvenation and a brighter, healthier complexion.

Read the Peer-Reviewed Published Study

THE BIOLOGICAL PROBLEM

Aging Skin Isn’t Damaged Skin. It’s Low-Energy Skin.

Over time, skin loses the energy it needs to stay even and luminous. Not because it’s broken — because it’s running low.

Energize your Skin
Innovative
Ingredient integrity
For all skin types
Foster cellular energy
Long-term evidence*

Energy Signal AMP

Exosome

Maybe
Maybe
Partial

Retinol

Vitamin-C

Otsuka Otsu Research Laboratories · Proprietary Ingredient

STEP 1

Energy Signal AMP

STEP 2

Absorbs fast and easily

STEP 3

Helps shed unwanted dead skin cells

STEP 4

Helps realign skin's natural vitality

STEP 5

Replenish skin's moisture barrier

AfterAfterBeforeBefore
Before
After

*4-week result of Rejuvenate Extract, N=29, 2025

*4-week result of Rejuvenate Extract, N=29, 2025

The Clinical Record

Visible Proof. Real Skin. Real Change.

Your skin has a signal. We amplify it.


3X¹

Increase in hydration.

29%²

Visible wrinkle reduction.

9%³

Reduction in visible age spots.

1. 24 weeks, N=10, 2000 | 2. 24 weeks, N=10, 2000 | 3. 8 weeks, N=8, 2008

Questions, Answered.

Still have questions? We're here to help. Check out our Frequently Asked Questions or contact us at hello@innersignal.us.

Powered by Energy Signal AMP

One Signal.
Lasting Change.

The longevity science you've been waiting for. Pharmaceutical-grade. Fragrance-free. The result of 25+ years asking better questions.