Everything DoseRank tracks on the castor oil 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 castor oil 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.
Pregnancy rateFrequency of achieved pregnancies.1 rankedModerate-strong
Activities of daily livingCapacity to complete routine self-care activities independently.1 rankedStrong
Reaction timeSpeed of physical or cognitive response to a stimulus.1 rankedStrong
Perceived exertionSubjective difficulty of physical effort.1 rankedStrong
Nitric oxide bioavailabilityAvailability of nitric oxide relevant to vascular function.5 rankedStrong
Erectile functionAbility to achieve and maintain an erection.4 rankedModerate-strong
Strength performanceMaximum or functional force production.1 rankedStrong
Night vision or dark adaptationAbility to see or adapt under low-light conditions.3 rankedStrong
Eye strainVisual fatigue or discomfort from eye use.2 rankedModerate-strong
Contrast sensitivityAbility to distinguish shades or low-contrast details.1 rankedStrong
Visual acuityClarity or sharpness of vision.1 rankedModerate-strong
Menstrual regularityMore predictable and regular menstrual cycles.2 rankedStrong
Kidney stone riskLikelihood of nephrolithiasis formation or recurrence.8 rankedModerate-strong
Intestinal permeabilityBarrier integrity and leakiness of the gut lining.1 rankedModerate-strong
Skin aging signsVisible features such as fine lines, wrinkles, or loss of firmness.3 rankedModerate-strongNothing is ranked yet — the shelf stays locked until you pick a goal.
No goal, no ranking.
A “best castor oil 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.