Every cost on longevitycost traces back to a primary source and a date. Here is exactly how we gather, grade, and present the numbers, and what we deliberately leave out.
We start from primary sources: the provider's own published price page wherever one exists. We cross-check against independent reporting and, for figures that move, against more than one source. We do not quote a price from a single unverified blog and present it as fact.
Each figure carries one of four labels so you know how much to trust it:
If we cannot stand behind a number, it does not go on the site as a fact. Examples we currently flag rather than state: Fountain Life's membership price (hidden), the often-quoted biological-age-test figure (unverified to the current product page), and a viral Blueprint monthly figure that traces only to a social post. Honesty about what we don't know is part of the service.
Longevity pricing changes constantly through new tiers, acquisitions, and promotions. We re-check figures periodically and date every page. If you spot a price that has moved, it probably has, verify with the provider before paying.
Last reviewed: June 2026