Everything DoseRank tracks on the castile bar soap shelf. The category itself is never ranked: 18 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 castile bar soap 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.
Activities of daily livingCapacity to complete routine self-care activities independently.1 rankedStrong
Wrinkle severityDegree of visible skin wrinkling.2 rankedModerate-strong
Eye strainVisual fatigue or discomfort from eye use.2 rankedModerate-strong
Liver functionOverall biochemical or clinical hepatic performance.5 rankedModerate-strong
Aspartate aminotransferase (AST)Enzyme used to assess liver and muscle injury.1 rankedStrong
Infection incidenceOverall rate of infectious illness.2 rankedStrong
Power outputAbility to generate force rapidly.2 rankedStrong
Omega-3 indexRed blood cell EPA+DHA content reflecting omega-3 status.2 rankedStrong
FerritinMarker of iron stores.3 rankedStrong
Alanine aminotransferase (ALT)Liver enzyme used to assess hepatocellular injury.3 rankedStrong
HemoglobinBlood oxygen-carrying protein concentration.3 rankedStrong
MemoryAbility to encode, store, and retrieve information.5 rankedStrong
Joint painPain arising from joints or periarticular tissues.9 rankedModerate-strong
Depressive symptomsLow mood, anhedonia, and related depressive features.10 rankedModerate-strong
Infection durationLength of infectious illness episodes.1 rankedModerate-strongNothing is ranked yet — the shelf stays locked until you pick a goal.
No goal, no ranking.
A “best castile bar soap supplement” list without a goal would be marketing, not evidence. Pick what you want to improve and DoseRank scores all 18 products against that goal's trials.