Head-to-heads

Treatment against treatment

Two treatments, side by side

• AgelessRx or HealthRx: two longevity prescription menus, side by side

  Same core menu, different ways of charging you. Here's every product and policy next to each other.

• Enclomiphene or TRT: raising your own testosterone vs replacing it

  One nudges your body to make more testosterone. The other hands it over directly. Here's what that means for fertility, FDA status, safety and your monthly bill.

• GHK-Cu or retinol: what controlled trials show for aging skin

  One has a clean 24-week trial behind it. The other has a lot of lab work and one small study. Here's what that means for your skin.

• Maximus or PeterMD: two men's hormone programs, side by side

  Both sell testosterone and enclomiphene online. They differ on forms, how prepaid plans work, how you pay for labs and how you cancel.

• Midi Health or Winona: how two online menopause programs compare

  One runs on video visits and your insurance. The other runs on portal messages and one monthly price. Here's every difference that changes what you pay and how you're seen.

• NAD+ or glutathione: two popular injections, two different jobs

  They're often sold as a pair. The research behind each one is very different, and so are the safety notes.

• NMN or NR: how the two NAD+ precursors compare on evidence and status

  Two vitamin B3 supplements, one shared promise, and finally a trial that tested them side by side. Here's what it found and where each one still has gaps.

• Compounded PT-141 or brand Vyleesi: what's the same and what isn't

  Same active ingredient, very different paperwork behind it. Here's what that changes for you.

• Sermorelin or TRT: two different hormones, two very different evidence records

  People shop them side by side, but they don't do the same job. Here's what each one acts on, what the trials show and what they cost online.

Provider against provider