InnerSignal Rejuvenate Extract Review: Ingredients, Subscription Terms, and Skin Claims

By MeridianMedicalCentre.com Health Research Team

Affiliate Disclosure: Meridian Medical Centre may earn a commission if you purchase through our links. This supports our independent research mission. Read our affiliate policy.

What InnerSignal Rejuvenate Extract Is

InnerSignal Rejuvenate Extract is a skin serum made by InnerSignal. The brand focuses on skincare from Japan. The product comes in a 30ml bottle as a light, milky liquid you use in the morning and at night.

The brand says this serum helps with age spots, fine lines, wrinkles, and dry skin. It has a special ingredient called Energy Signal AMP plus common moisturizing ingredients.

What Is in the Formula

The ingredient list on the official product page includes:

• Water – Main ingredient
• Glycerin – Pulls water into the top layer of skin
• Squalane – Light oil that feels like your skin's natural oils
• Alcohol – Helps preserve the product and feel
• Disodium Adenosine Phosphate (Energy Signal AMP) – Natural molecule; the brand says it helps skin hold water
• Polyglyceryl-10 Isostearate – Helps mix ingredients
• Acrylates/C10-30 Alkyl Acrylate Crosspolymer – Changes the texture
• Sodium Isostearoyl Lactate – Helps clean skin
• Polyglyceryl-10 Stearate – Helps mix ingredients
• Sodium Hydroxide – Balances how acidic or basic the serum is
• Dipotassium Glycyrrhizate – Comes from licorice root; meant to calm skin
• Methylparaben – Keeps the product fresh
• Butylparaben – Keeps the product fresh

The exact amounts of each ingredient are not listed. No special proprietary blend is named.

What Science Says About Key Ingredients

Glycerin. Glycerin is safe in skincare. Experts say it works well and helps skin hold onto water.

Squalane. Squalane is safe for skin products. It is light and may help protect skin. Most studies were done in labs, not on real people.

Disodium Adenosine Phosphate (Energy Signal AMP). Experts say this ingredient is safe in skincare. Not many studies show how it helps human skin age or stay moist.

Dipotassium Glycyrrhizate. This licorice ingredient may help reduce swelling and protect skin in lab tests. It is safe at amounts used in skincare. Not many real-world tests on human skin exist.

Parabens (Methylparaben, Butylparaben). Both are safe preservatives used in many products. Some research raised questions about how they affect your body, but the amounts in skincare are very small and regulated.

How to Use It

The brand says to use it like this:

• Use 3 pumps on clean, dry skin
• Press gently into your face, neck, and upper chest using warm hands
• Use it twice a day, morning and night
• Add sunscreen with SPF in the daytime

Only use on the outside of skin. The brand warns:

• Do not get it in your eyes
• Keep away from children
• Stop using and talk to a doctor if your skin gets irritated

How to Buy It

InnerSignal offers three ways to buy:

One-Time Buy: $90 for one 30ml bottle. Shipping cost is added at checkout. Free shipping for orders over $40.

Subscribe & Save: $79 per bottle (12% off the regular price). You choose how often it arrives: every 1, 2, or 3 months. It renews by itself unless you cancel.

14-Day Trial Kit: 28 small packets (one for morning, one for night). Comes with a small booklet and full ingredient list. The trial kit price shows as a free gift with a subscription on the website; check the exact price when you buy.

The return or refund rules are not detailed in the main materials. Before you buy, check the official site for how to cancel, how long you have to return it, and if you have to pay to ship it back.

What the Brand Claims

InnerSignal says the serum will:

• “Visibly reduce age spots, wrinkles, fine lines, and deliver deep hydration” (brand words)
• “Make skin 3 times more moist” (brand claim)
• “Work on sensitive skin”
• Energy Signal AMP will “refill your skin's moisture barrier and wake up your skin”

These claims are on the official product page. However, there are no independent clinical studies or published research proving these claims work in real people. Experts have confirmed the ingredients are safe, not that this specific serum does what the brand says.

This is normal in skincare marketing: ingredients are shown to be safe, but the finished product's benefits may only be tested by the brand, not by outside researchers.

What the Science Actually Shows

Safety: All main ingredients have been checked by cosmetic safety experts. None are banned or restricted. The serum is safe to use on facial skin when you follow the directions and does not have toxic ingredients.

Moisturizing: Glycerin and squalane are both real moisturizers that work. They help skin hold water. If you want hydration, these ingredients do the job.

Age Spots and Fine Lines: The brand claims it reduces age spots and fine lines. The ingredient research does not show that this serum does this in real people. Hydrated skin may look plumper and smoother, but erasing spots or deep wrinkles takes stronger treatments like retinoids or vitamin C, which are not in this serum.

Adenosine Phosphate (Energy Signal AMP): This ingredient is safe and has been used in skincare for a long time. Few peer-reviewed studies prove it reverses aging or works much better than plain moisturizers.

For more on skin aging and longevity, read “Mitochondria, Methylene Blue, and Skin Longevity: Connecting the Dots” and our review of Votary Super Renewal Serum.

Who Should Use This Product

Good for you if you:

• Want a light daily moisturizer for face and neck
• Like to see all the ingredients in a product
• Want to try the 14-day kit before buying the full size
• Are okay with auto-renewal and know how to cancel
• Use other treatments like retinoids or sunscreen
• Have normal or combination skin and use products with glycerin and alcohol

Think twice if you:

• Have very sensitive skin or react to parabens – test a small amount first
• Need proof the serum reduces wrinkles or age spots in real studies – this does not have that proof
• Think moisturizer alone can erase deep wrinkles or sun damage – you may need a retinoid or a doctor's treatment
• Want paraben-free products – this has methylparaben and butylparaben
• React to alcohol in skincare – alcohol is listed
• Want a promise you can return it – check the exact return rules before buying

Before You Buy: Checklist

• ☐ Read the full ingredient list on the official site and check for any ingredients that bother your skin
• ☐ Test a small amount on your inner arm or behind your ear if your skin is sensitive
• ☐ Check the price and any deals at checkout
• ☐ Understand how to cancel auto-renewal on a subscription
• ☐ Read the return and refund rules
• ☐ If you want proof the serum works, email the brand and ask for published studies first
• ☐ Have a sunscreen with SPF ready for daytime use