Longevity & NAD+

The best longevity supplements for dogs pair NAD+ precursors with antioxidants, and we score Boops against every rival honestly.

92 guides in this section.

Sep 5, 2026

Can Dogs Take Metformin for Longevity, Off-Label?

A veterinary neurologist walks through what metformin actually does, what the human TAME trial does and doesn't tell us about dogs, and why she won't write the off-label longevity script.

Aug 24, 2026

Why an Old Dog's Eyes Look Cloudy or Hazy

A veterinary anesthesiologist explains the two real reasons a senior dog's eyes turn hazy — nuclear sclerosis versus cataracts — and how to tell which one you're looking at.

Jul 31, 2026

Why Do Small Dogs Live Longer Than Large Dogs?

The size-lifespan gap in dogs is real and well documented. Here's what growth hormone, aging rate, and periodontal risk actually explain — and what it means for your own dog.