Your shortlist.

Ultrahuman Ring Air

A featherweight titanium smart ring (2.4–3.6 g) tracking sleep, recovery, HRV, and temperature — with every feature included in the $349 purchase and no subscription, the direct counterpoint to membership-model rings. 4–6 day battery, 10 ATM water resistance.

Lingo

Abbott's over-the-counter continuous glucose monitor: a two-week biosensor and coaching app for anyone curious about their glucose responses — no prescription, no subscription required.

Thorne

Practitioner-grade supplements with unusually rigorous testing — NSF Certified for Sport across much of the line — plus at-home tests that pair results with targeted protocols. The brand clinicians actually recommend.