How we make money

Some links on HealthspanPrices may be affiliate links. If you buy through one, the seller may pay us a commission at no extra cost to you. As of Oct 19, 2026, we have not joined any affiliate programs; all links are plain links.

Our rules

• Price tables are always sorted by total listed price, lowest first. Commissions never change the order.
• We list sellers whether or not they pay us.
• Evidence levels are based only on published sources, never on whether a test earns a commission.
• Affiliate links will be marked once they exist.

This disclosure follows the U.S. FTC's guidance on endorsements and affiliate relationships.