Eight free tools now run the math behind every recommendation on this site: dose conversion, cost per day, omega-7 label checks, side-by-side product comparisons, the full product database, a form-finder quiz, honest vitamin C bands, and a filterable finder for the research itself. The links are live below, and the methods section under them is the same math, ready to run on any bottle you are holding.
Tool 1: The dose converter
The human trials dosed oil in grams per day. Labels speak in softgels and milliliters. Convert like this:
- Find the oil per softgel (usually 500 or 1,000 mg) or per serving of liquid.
- Pick your target from the dosage page: 2 g/day for the dry-eye and skin studies, 3 g/day for the vaginal-health study.
- Divide. Two grams at 500 mg per softgel is 4 softgels a day. At 1,000 mg, it is 2.
If your plan from step 3 feels like a lot of capsules, that is the honest arithmetic, and liquid oil is usually the cheaper route to the same grams.
Tool 2: The cost-per-day formula
Bottle price means nothing. Cost per studied day means everything:
(bottle price ÷ total oil in the bottle) × your daily grams
Example: a $44.86 bottle with 120 × 500 mg softgels holds 60 grams. That is $0.75 per gram, so the 2-gram study dose costs about $1.50 a day. Our capsules guide publishes this number for every product we score.
Tool 3: The label checklist
Six lines to find before money changes hands:
- Plant part: berry, seed, or blend, stated outright.
- Species: Hippophae rhamnoides.
- Extraction: CO2 or cold pressed.
- Certification: organic with a named certifier.
- Origin: a region, not a mystery.
- Dose info: oil per softgel or per ml, so the dose converter works.
Anything missing is a question the brand chose not to answer. The oil guide shows products that answer all six.
The eight tools, live
- Dosage calculator: studied grams converted to softgels or ml per day, with the per-meal split and bottle longevity.
- Cost per day calculator: any bottle price turned into cost per studied day, month, and year, with prefills for our anchors.
- Omega-7 label checker: serving size times label percentage, banded against the reference blend.
- Compare products: pick two or three verified products and see the numbers side by side.
- Product database: every product we have verified so far, sortable by price, cost per day, or score.
- Form quiz: four questions that point you to the right form, with the decision logic in the open.
- Vitamin C comparator: honest low-to-high bands for every form, against oranges and your daily need.
- Research finder: every study behind our claims, filterable by topic, design, and verdict, nulls included.
Who each tool is for
The dose converter is for anyone holding a bottle, turning studied grams into softgels or milliliters you can count. Cost per day is for anyone comparing two prices, because the cheaper bottle is often the more expensive habit. The omega-7 label checker is for skeptics, since a percentage without a serving size says nothing. Compare products and the database are for shortlisting before you read reviews. The form quiz is for true beginners. The vitamin C comparator is for food-first readers deciding between berries, juice, and powder. The research finder is for everyone who wants the receipts.
A worked example, start to finish
Say you are holding a $44.86 bottle of 120 softgels at 500 mg each. The label checklist passes: berry oil, named species, CO2 extraction. The dose converter says the 2-gram study dose is 4 softgels a day. Cost per day: 60 grams in the bottle, $0.75 per gram, $1.50 a day at the study dose. That is the full loop, and it takes longer to describe than to run.
What the math cannot tell you
These tools compare labels, not what is inside the capsule. A bottle can ace every number and still disappoint if the oil oxidized or the label overstates. Third-party testing fills that gap, which is why our oil guide scores certificates alongside cost. The product forms page explains the trade-offs the quiz simplifies, and the glossary defines every term the label checker asks about, from palmitoleic acid to CO2 extraction.
Frequently asked questions
Which sea buckthorn tool should I start with?
Depends where you are. Choosing between oil, capsules, juice, and powder: start with the form quiz. Comparing two specific bottles: the cost-per-day calculator. Already holding a bottle and wondering how much to take: the dose converter. Checking whether a label's omega-7 claim means anything: the label checker.