No.4 Stem Cell Hair Regrowth Serum

SKU: RC4HS
Rule No. 4 Stem Cell Hair Regrowth Serum packaging and bottle, highlighting its advanced hair restoration formula, set against a rugged fabric and stone backdrop, emphasizing its premium and effective qualities.
Rule No. 4 Stem Cell Hair Regrowth Serum bottle, emphasizing advanced hair restoration benefits, displayed on rugged stone with a flowing waterfall backdrop, highlighting its natural yet powerful qualities.
Rule No. 4 Stem Cell Hair Regrowth Serum packaging and bottle, highlighting its advanced hair restoration formula, set against a rugged fabric and stone backdrop, emphasizing its premium and effective qualities.
Rule No. 4 Stem Cell Hair Regrowth Serum bottle, emphasizing advanced hair restoration benefits, displayed on rugged stone with a flowing waterfall backdrop, highlighting its natural yet powerful qualities.

No.4 Stem Cell Hair Regrowth Serum

SKU: RC4HS
/
1 fl oz./ 30mL

Revitalize your hair with the No. 4 Stem Cell Hair Regrowth Serum. Powered by Procapil™ and Swiss apple stem cells, it boosts thickness, stimulates growth, and fortifies hair follicles. This advanced formula rejuvenates the scalp, extending growth phases for more potent, fuller hair. Nourish your scalp and regain confidence with this science-backed solution.

Key Benefits

Increases hair thickness and density.
Slows hair loss with Procapil™️
Stimulates new hair growth and rejuvenates aging hair.

Main Ingredients

Procapil™: Combats hair thinning by strengthening and protecting hair follicles.
Swiss Apple Stem Cells: Promotes hair vitality and longevity.
Panthenol (Vitamin B5): Deeply hydrates and improves scalp health.
Biotin: Supports keratin production for stronger, healthier hair.
Niacinamide: Enhances blood flow to the scalp, encouraging growth.

 

Shipping calculated at checkout.

Useful Information

  • 30-Day Return: Satisfied or return within 30 days.
  • Orders are processed within 1-2 business days.
  • Standard shipping takes 3-5 business days; expedited shipping takes 1-3 business days.
  • Shipping costs are calculated at checkout; free delivery on orders over $200.
  • You'll receive an email with tracking details once your order ships.
  • Hair can be dry or towel-dried before applying. Part your hair in sections, and apply 2-3 drops of the serum along each part, including the temples. Gently massage the serum into your scalp. Do not rinse or blow-dry after application. Style your hair as usual. Apply daily, either in the morning or evening, without washing afterward for optimal results.
  • Aqua/Water: Hydrates and supports formula balance.
  • Ethanol: Quick-drying and helps active ingredients absorb.
  • Propylene Glycol: Enhances moisture and ingredient delivery.
  • Ginkgo Biloba (Ginkgo) Extract: Antioxidant that soothes and revitalizes.
  • Malus Domestica Fruit Cell Culture Extract: Protects and rejuvenates skin cells.
  • Diamino Pyrimidine Oxide: Promotes healthier, stronger hair.
  • Phenoxyethanol: Preserves formula freshness and stability.
  • Caprylyl Glycol: Moisturizes and boosts effectiveness.
  • Butylene Glycol & PPG-26-Buteth-26 & PEG-40 Hydrogenated Castor Oil: Improves absorption and hydration.
  • Apigenin: Reduces inflammation and supports scalp health.
  • Oleanolic Acid: Reduces oil production and combats breakouts.
  • Biotinoyl Tripeptide-1: Strengthens hair and promotes growth.
  • Polyacrylate Crosspolymer-6: Provides texture and stability.
  • Panthenol: Hydrates and soothes skin and hair.
  • Fragrance: Adds a pleasant, light scent.
Back to Hair Collection

Your Hair, Your Power

Make Your Mark

Strong hair commands attention. Refresh your style, restore your edge, and lead with quiet assurance.

Before & After in 8 Weeks

From our customers

★★★★★

Rule No.4 has been a game-changer for me. My hairline is filling in, and my scalp feels healthier than ever. It’s like hitting rewind on hair loss.

Tyler Dawson
Bozeman, MT
★★★★★

I’ve been using the Stem Cell Hair Regrowth Serum for two months, and the results are incredible. My hair feels thicker, and I’m even seeing new growth in areas I thought were gone for good.

Aaron Campbell
Little Rock, AR
★★★★★

I was hesitant at first, but Rule No.4 delivers. My thinning hair is noticeably fuller, and it looks much healthier overall. Highly recommend it!

Dylan Carter
Provo, UT
★★★★★

This serum is exactly what I needed. It’s easy to use, and I’ve already seen a difference in the thickness and strength of my hair.

Brandon Ortiz
Wichita Falls, TX
★★★★★

I never thought I’d find a solution for my hair loss, but Rule No.4 exceeded my expectations. My hairline is coming back, and I couldn’t be happier.

Trevor Harris
Springfield, MO
You may also like