How VitaminDB works
- Members post deals. Anyone signed in can submit a vitamin or supplement deal. We auto-extract title, image, and price from the URL.
- The community votes. Hot or cold. The temperature score combines votes and time decay. Deals above 0° trend up; below 0° drop off the front page.
- We compute cost-per-dose. Submissions include serving size and daily dose. We divide and show you the real number — sortable, comparable.
- Moderators review. Reports get triaged. Spam, expired, dangerous claims are hidden. Audit log keeps everyone accountable.
- Cost-per-dose stays fresh. We re-check listings periodically so the cost-per-dose you see reflects recent data — then always confirm the live price on Amazon.
Frequently asked
How does VitaminDB work?
Members submit vitamin and supplement deals; the community votes hot or cold; we compute cost-per-dose from serving size and daily intake so you can compare apples-to-apples; moderators triage reports. Always confirm the current price on Amazon before buying.
How is cost-per-dose calculated?
Cost per serving = product price ÷ servings per container. Cost per day = cost per serving × servings you take per day. We surface the per-day number on every deal so you compare what you actually pay, not the sticker price on the bottle.
Why does form matter (e.g. magnesium glycinate vs citrate)?
Different forms of the same nutrient have different bioavailability and side effect profiles. Magnesium glycinate absorbs better and is gentler than oxide; citrate has a laxative effect at higher doses. We tag each deal with the exact form so you can filter by what evidence supports.
What does the temperature score mean?
Each deal has a temperature in degrees, ranging roughly from −300° (cold, dropped off the page) to +500° (hot, trending). Members vote hot or cold; the score is the net votes × 10. Hot deals appear in the front-page Hot strip; cold deals fall away.
Are these affiliate links?
When you click "Get deal" we redirect through /go/[id] which adds an affiliate tag where the merchant runs a program (Amazon Associates, iHerb Rewards, Awin, CJ). The price you pay is identical to going direct. We never accept payment to promote a deal — sorting is purely community-driven.
Is this medical advice?
No. VitaminDB aggregates deals and community discussion. Supplements interact with medications and conditions. Consult a healthcare professional before starting anything new.