Hair Ingredients & Treatments
The actives behind hair growth and repair — minoxidil, peptides, rosemary oil, bond-builders and more — weighed by evidence, not hype. What is worth your money and what is not.
Hair Loss Treatments
Hair Transplants for Women: FUE, Candidacy & What to Expect
Hair transplants can permanently restore density in women with stable pattern hair loss.
2% vs. 5% Minoxidil for Women: Which Strength Is Right?
5% minoxidil outperforms 2% on patient-rated outcomes.
Minoxidil for Women: How to Use It, Side Effects & Results
Topical minoxidil (2% or 5%) is the only FDA-approved.
Oral Minoxidil for Women: Dosing, Efficacy & Side Effects
Low-dose oral minoxidil (0.25–1 mg daily) effectively treats female pattern hair loss with comparable efficacy.
PRP Therapy for Hair Loss: What It Is & Does It Work?
PRP injections improve hair density in androgenetic alopecia with moderate evidence.
Spironolactone for Female Hair Loss: Evidence & Safety
Spironolactone (50–200 mg daily) reduces androgens at the hair follicle and stabilizes female pattern hair.
Scalp Growth Actives
Best Scalp Actives for Hair Growth Ranked by Evidence (2026)
Minoxidil has the strongest evidence for hair growth; rosemary oil, caffeine, peptides.
Biotin for Hair Growth: What the Science Actually Shows
Biotin supplements improve hair growth only in people with confirmed biotin deficiency.
Caffeine for Hair Growth: How It Works & the Best Products
Topical caffeine stimulates hair follicle growth by blocking DHT effects and elevating cAMP.
Peptides for Hair Density: Redensyl, Capixyl & Procapil Explained
Redensyl, Capixyl, and Procapil are peptide-based scalp actives with small clinical trials showing hair density.
Rosemary Oil for Hair Growth: Evidence, Hype & How to Use It
Rosemary oil shows clinically meaningful hair growth benefits via 5α-reductase inhibition and scalp microcirculation improvement.
Rosemary Oil vs. Minoxidil: What Does the Research Show?
One RCT found rosemary oil equivalent to 2% minoxidil at 6 months.
Saw Palmetto for Hair Loss in Women: Evidence & Safe Use
Saw palmetto modestly inhibits DHT and may reduce hair shedding in women.
Moisturizing Conditioning
Deep Conditioning: How Often, How Long & Best Masks
Deep condition every 1–2 weeks for 20–30 minutes.
Glycerin in Hair Products: When It Helps & When It Causes Frizz
Glycerin hydrates hair in moderate humidity but pulls moisture out in very dry air.
Leave-In Conditioner: When to Use It & Best Formulas by Type
Leave-in conditioner is essential for curly, color-treated, heat-styled, or long hair.
The LOC & LCO Method: Which Order Works for Your Hair?
LOC (liquid, oil, cream) seals moisture best for high-porosity curly hair.
Hair Ingredient Science
Hair Care Glossary: 100+ Terms Defined Simply
Plain-English definitions for every hair care term.
Hair Oils Guide: Coconut, Argan, Jojoba — What Each Does
Coconut oil penetrates the hair shaft and reduces protein loss.
Silicones in Hair Products: Harmful or Helpful?
Silicones are effective hair conditioning polymers.
Sulfate-Free Shampoo: Who Actually Needs It (and Who Doesn't)
Sulfate-free shampoos are gentler cleansers best suited to color-treated, chemically processed, dry, or curly hair.
Hair Supplements
Iron & Ferritin for Hair: What Level Do You Need for Regrowth?
Most experts recommend serum ferritin of at least 40–70 ng/mL for hair regrowth.
Hair Loss Supplements: What Works, What's Hype & What's Safe
Only supplements correcting a confirmed deficiency — iron, vitamin D, zinc.
Vitamin D Deficiency & Hair Loss: What the Research Shows
Vitamin D deficiency is found in over 50% of people with alopecia areata and female.