Supplement price drops we track
We re-price every product in our catalog with Amazon's Creators API and compare it against the price we recorded on , a quiet week with no sale running. A product is listed here only when its live price is at least 10% under that baseline and it is still purchasable. Both prices are ours; nothing comes from a sale banner. Last comparison: , 715 products.
Nothing is down 10% right now
As of , none of the 715 products we track is at least 10% under its price. That is the normal state: supplement prices on Amazon move a few percent week to week, and real drops cluster around the two Prime events (July and October) and late November.
Until then, the cheapest way to buy is still the one every guide on this site ranks by: cost per clinical dose, not the sticker price.
How this list is built
- Baseline. On September 17, 2026 we recorded the live Amazon price of every catalog product with a verified ASIN (715 purchasable).
- Refresh. During a sale week we re-price the same products and compute the change against that baseline.
- Threshold. Only drops of 10% or more are listed, and only for products that are in stock with a buy box. A product that recovers to its old price drops off at the next refresh.
- No inflated "was" prices. The comparison price is what we saw on a normal week, not a list price. If a brand raised its price in September to discount it in October, the drop against our baseline will be small or zero, and it will not appear here.
The catalog behind this page is the same one that ranks products on our guides. Start from a hub if you want the full comparison rather than the discount alone: creatine, magnesium glycinate, omega-3, collagen, vitamin D3, B12.