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Keratin Hair Booster

Reserveage Nutrition
4.4
★ ★ ★ ★ ★
(2072 ratings)
Keratin 500 mg
Biotin 3000 mcg
Copper 1.7 mg
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Score91

A specialized beauty booster featuring patented keratin, biotin, and a 1.7 mg maintenance dose of copper.

How scoring works
Quantity:60 Capsule(s) • (30 servings)
Goals:
Hair Health
Nail Health
Skin Health

Score 91

A specialized beauty booster featuring patented keratin, biotin, and a 1.7 mg maintenance dose of copper.

How scoring works
$35.99($1.19 per serving)
Pure Formulas
$ 39.59
iHerb
$ 44.74
Amazon
$ 39.59
Walmart
$ 35.99
Vitacost
$ 49.19
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Analysis

This supplement features 500 mg of Cynatine HNS, a solubilized form of keratin that is highly bioavailable for the hair and skin. It provides 1.7 mg of copper and 15 mg of zinc, which are necessary minerals for the enzymatic production of healthy tissue. The addition of 3,000 mcg of biotin further supports the metabolic synthesis of hair proteins.

The formula is highly targeted toward improving hair density and nail hardness. While the copper is in the sulfate form, which is less absorbable, its role here is primarily as a co-factor for the keratin. This is an excellent choice for individuals seeking visible improvements in their hair and nail quality.

Pros

  • Clinically studied Cynatine HNS keratin
  • High 3,000 mcg biotin dose
  • Targeted for hair and nail strength
  • Balanced zinc-to-copper ratio
  • Includes B-vitamin co-factors

Cons

  • Uses less bioavailable copper sulfate
  • High price per serving
  • Requires consistent use for 3+ months

Warnings

  • Expect to wait several months for visible results
  • Take with food to minimize zinc nausea
  • Check total biotin intake from other sources

Nutrient quality

98 Highest impact

The inclusion of 500 mg of Cynatine HNS provides a full clinical dose of highly bioavailable keratin. Essential minerals and B-vitamins are well-dosed to support the enzymatic pathways required for healthy tissue growth.

Ingredient transparency

95 Highest impact

All active ingredients are clearly disclosed with specific amounts, including the branded keratin source. Transparency is high, allowing for a precise evaluation of the supplement's potency and quality.

Customer satisfaction

93 Highest impact

Strong ratings across thousands of reviews reflect high user confidence in the product's effectiveness for hair and nail health. Consistent positive feedback suggests a reliable experience for the majority of consumers.

Value for money

76 High impact

The price per serving reflects the premium for a clinically-backed, trademarked ingredient at a full dose. While expensive, the clinical efficacy of the components offers high functional value for targeted goals.

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Goals

Impact
Highest effect
A+ Goal FitA+ Strength of SupportA+ CoverageA+ Formula Quality

Utilizing a combination of 500 mg of clinically studied Cynatine HNS keratin and 3000 mcg of biotin appears perfectly aligned for improving hair strength and growth. Keratin is the primary protein in the hair shaft, and providing it in a solubilized form significantly improves its bioavailability.

Zinc and copper are included at meaningful doses to maintain the enzymatic health of the follicle and preserve natural hair color. This targeted formulation addresses the structural building blocks and metabolic cofactors required for visible improvements in hair density.

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Impact
Highest effect
A+ Goal FitA+ Strength of SupportA CoverageA+ Formula Quality

Cynatine HNS solubilized keratin at 500 mg is a clinically validated dose for improving nail surface quality and strength. Biotin at 3,000 mcg further supports the metabolic synthesis required for new nail growth.

The inclusion of zinc and copper in sulfate and oxide forms provides essential enzymatic cofactors, although these forms are less bioavailable than chelates. This formula is highly targeted toward the structural protein composition of the nail plate.

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Impact
Highest effect
A+ Goal FitA Strength of SupportA- CoverageA+ Formula Quality

Keratin peptides and biotin work together to support the structural framework of the skin and its appendages. The inclusion of copper and zinc serves as a necessary enzymatic foundation for collagen and elastin cross-linking.

Using a solubilized form of keratin may contribute to improved skin smoothness and moisture retention. This formulation provides meaningful dosages of primary actives alongside essential mineral cofactors.

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Ingredients

IngredientAmount per serving
Niacin (Niacinamide)
18 mg NE
Vitamin B6 (Pyridoxine Hydrochloride)
2 mg
Biotin
3000 mcg
Pantothenic Acid (Calcium D-Pantothenate)
14 mg
Zinc (Zinc Oxide)
15 mg
Copper (Copper Sulfate)
1.7 mg
Cynatine HNS (Keratin, Sheep's Wool)
500 mg
Pro-Longevity Factors Blend
40 mg
Gluten Free Adults 18–50
Report overview
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyB+ Value
This premium supplement provides a full clinical dose of trademarked Cynatine HNS keratin from a high-quality wool source. It is an excellent choice for targeted hair support despite the higher price point.
Biotin · 3000 mcg OverallScore78
B+ Active Ingredient Quality & BioavailabilityB+ Dose, Safety & Label TransparencyC Value
This targeted booster provides 3,000 mcg of biotin combined with patented keratin to support hair health and vitality. It is delivered in a clean capsule format that prioritizes the purity of its active structural ingredients.
F Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyF Value
Keratin Hair Booster uses copper sulfate, an inorganic salt with suboptimal absorption compared to chelated forms. While it hits a safe dose, the price per serving is relatively high for a product focused on hair and skin co-factors.
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