Everything DoseRank tracks on the hair oil & serum shelf — Lithium Orotate. The category itself is never ranked: 22 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 oil & serum 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.
IrritabilityLow threshold for frustration or anger.3 rankedLimited
Back painPain localized to the back.1 rankedStrong
Headache severityFrequency or intensity of headaches.1 rankedLimited
Oral healthOverall condition of the mouth, teeth, and gums.1 rankedStrong
Bone turnover markersBiochemical indicators of bone formation and resorption.3 rankedStrong
All-cause mortalityDeath from any cause; lowest-level hard clinical outcome.6 rankedModerate-strong
Aspartate aminotransferase (AST)Enzyme used to assess liver and muscle injury.1 rankedStrong
Choline statusAdequacy of choline availability.2 rankedStrong
Vitamin K statusBiochemical sufficiency of vitamin K.2 rankedStrong
Arterial stiffnessReduced elasticity of arteries associated with cardiovascular risk.3 rankedStrong
Intestinal permeabilityBarrier integrity and leakiness of the gut lining.1 rankedStrong
Vascular functionOverall health and reactivity of the circulatory system.4 rankedModerate-strong
Iodine statusBiochemical sufficiency of iodine.2 rankedStrong
Alanine aminotransferase (ALT)Liver enzyme used to assess hepatocellular injury.3 rankedStrong
Thyroid-stimulating hormonePituitary hormone used to assess thyroid status.3 rankedStrongNothing is ranked yet — the shelf stays locked until you pick a goal.
No goal, no ranking.
A “best hair oil & serum supplement” list without a goal would be marketing, not evidence. Pick what you want to improve and DoseRank scores all 22 products against that goal's trials.