Everything DoseRank tracks on the hair styling shelf — Marine Collagen and Astaxanthin. The category itself is never ranked: 146 products get scored the moment you say what you want them to do.
How to read the scores
This legend covers the scores on this page — for data sources, scoring weights, and limits, read the full methodology →
Answer a few questions about your goals, habits, stack, and budget. Then, DoseRank will find the products that best match your needs based on your answers. It's free and only takes 60 seconds! No account is required.
A saved, shareable breakdown: your matched products, dose math, interaction flags to discuss with a clinician, and a price-tracked stack you can revisit.
Questions
Each product gets a composite score blending clinical strength, evidence, dose fit, trust and value — computed for the goal you picked, across this category's products. The #1 on the DoseRank tab has the highest composite; the other tabs re-rank the same products by Value, Trust, or Popularity. Placement is never paid.
Start with a goal, not a brand
Browsing hair styling supplements without a goal makes no sense — different products do different jobs, and “best” flips depending on which job you're hiring for. These are the 45 health outcomes that matter for this category. Pick yours, and the full evidence-ranked shelf loads for that goal alone.
Wrinkle severityDegree of visible skin wrinkling.13 rankedStrong
Omega-3 indexRed blood cell EPA+DHA content reflecting omega-3 status.14 rankedStrong
Pregnancy rateFrequency of achieved pregnancies.2 rankedModerate-strong
Skin hydrationMoisture content or hydration of the skin.17 rankedStrong
Muscle massQuantity of skeletal muscle tissue.39 rankedStrong
Lean body massNon-fat body mass, often used as a marker of preserved musculature.33 rankedStrong
Urinary tract symptomsSymptoms involving urination or bladder discomfort.19 rankedStrong
FerritinMarker of iron stores.22 rankedStrong
HemoglobinBlood oxygen-carrying protein concentration.22 rankedStrong
NocturiaWaking at night to urinate.6 rankedModerate-strong
Potassium statusBody potassium balance.23 rankedStrong
Hair growth or densityIncrease or preservation of scalp or body hair.8 rankedLimited
Abdominal painPain arising from the abdomen or digestive tract.18 rankedStrong
Atopic dermatitis symptomsItching, rash, and inflammation related to eczema.15 rankedModerate-strong
C-reactive proteinAcute-phase inflammatory marker.21 rankedStrongNothing is ranked yet — the shelf stays locked until you pick a goal.
No goal, no ranking.
A “best hair styling supplement” list without a goal would be marketing, not evidence. Pick what you want to improve and DoseRank scores all 146 products against that goal's trials.