Label snapshot
What the product contains and what one serving costs, according to our catalog. Label amounts are not personal dose recommendations.
| Ingredient | Amount per serving |
|---|---|
| Spermidine | 1 mg |
Amounts are per label serving as recorded in the catalog and are not a recommendation. Testing status reflects what the brand lists. Nothing here is medical advice.
These calculations describe our scoring method. They are not a recommended dose or proof of benefit from this product.
Evidence gates dose: the evidence grade sets the ceiling, and the dose decides how much of that ceiling the product reaches. Value = inverse of price-per-trial-dose-day. Community = mean sentiment of external reviews. Safety caps applied after weighting.
This score is our editorial judgment, not a scientific standard. We combine published evidence, dose, price, transparency, and consumer signals into one composite: this is our method, not a peer-reviewed clinical rating. A higher score means a product does better on the factors we weight, not that it is medically proven to work.
This Oxford Healthspan Primeadine Original Powder scores 6.0, making it below the site average. It delivers 1mg of Spermidine, inside the studied range of 0–6mg with grade C evidence (mostly preclinical, limited human data). At $3.20/day it's among the more expensive options in Autophagy.
The science behind each active ingredient, independent of which brand sells it.
The autophagy-inducing polyamine; the largest human trial found no cognitive benefit.
The specific product: dose, price, transparency, and what buyers report.
Safety flags, transparency gaps, dosing concerns, and recurring buyer complaints.
The main ingredients of this product, in plain language.
The autophagy-inducing polyamine; the largest human trial found no cognitive benefit.
Read about Spermidine →Hard numbers and independently checked status. Expand each block for its source.
All product data is checked against original sources. Prices, doses, and testing status are updated when product pages change. Evidence grades are reviewed when new human RCTs are published. Read how we verify.
Consumer signals gathered from 1 platform.
Low confidence, small sampleThese are consumer sentiment signals. They do not measure whether the product actually works. See our evidence section for that.
No external reviews aggregated yet for this product.
Published evidence, claim checks, regulatory status and what could not be verified.
The studies that established the trial dose and evidence grade for each active ingredient in this product. Click through to read the original paper.
90-day tub of concentrated defatted wheat-germ spermidine powder, sourced in Japan. Same 1 mg/serving spermidine dose as Primeadine Original capsules in a mixable powder format. Tested by independent lab in Japan and the USA for heavy metals, mycotoxins, pesticides, and herbicides. Public lab certificate not stated on the brand site.
If you are the manufacturer or brand owner of Primeadine Original Powder and believe any data on this page is incorrect (wrong dose, wrong ingredient, wrong price, missing certification, outdated status), you can request a correction.
We review every request, verify it against primary sources, and publish any accepted change with a dated note. Corrections from brand owners are treated the same as corrections from anyone else: verified before they move.
Request a correction →The next highest-scoring products in Autophagy, same scoring method, same rules.
ProHealth LongevityStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
Oxford HealthspanStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
SolarayDaily use may exceed one serving
Status as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
Oxford HealthspanStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
Oxford HealthspanStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.