Beauty
Keratin (Solubilized)
Also known as: Cynatine HNS
Hair and nail protein in absorbable form. Provides building blocks for keratin structures.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Every Keratin (Solubilized) product we have scored
| # | Product | Score | Per serving |
|---|---|---|---|
| 1 | Bluebonnet Nutrition BEAUTIFUL ALLY HAIR, SKIN & NAILS | 75 B+ | $1.04 |
| 2 | Zhou Nutrition Hairfluence | 72 B | $0.83 |
| 3 | Olly Ultra Strength Hair Softgels | 71 B | $0.67 |
Scored on dose accuracy, form, label transparency and third-party testing. Per-serving cost is list price divided by servings per container. No brand pays to be listed or ranked.
Common questions
How much Keratin (Solubilized) should I take?
The typical range is 500mg daily. 3+ months for effects
When should I take Keratin (Solubilized)?
Any time. Optional.
Which form of Keratin (Solubilized) is best?
Capsules — Solubilized form.
Is Keratin (Solubilized) safe?
Commonly reported: Rare. Serious warnings: None. Safe
Which Keratin (Solubilized) supplement scores highest?
Bluebonnet Nutrition BEAUTIFUL ALLY HAIR, SKIN & NAILS, at 75/100. Scored on dose accuracy, form, label transparency and third-party testing — no brand pays to be listed or ranked.
Primary uses
- Hair strength
- Nail strength
- Keratin support
How it works
- Provides keratin building blocks
- May strengthen hair/nails
- Cysteine-rich protein
Dosage
- Typical range
- 500mg daily
- Timing
- Any time
- With food
- Optional
- Duration
- 3+ months for effects
- Special populations
- Weak hair/nails
Forms
- Capsules
Safety
Common side effects
- Rare
Contraindications
- None
Products containing Keratin (Solubilized)
Top-scoring supplements in our catalog that list Keratin (Solubilized) on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Emerging, less evidence than biotin
Grade C: Mostly observational or small trials; mechanism is plausible but unproven at scale.
Related in Beauty
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.