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  4. The 3 Longevity Supplements Researchers Keep Coming Back To
Aug 11, 2026

The 3 Longevity Supplements Researchers Keep Coming Back To

By Matt Johnson

Founder of The Feed

Longevity isn't about slowing down; it's about staying able to train hard, recover well, and keep loving your sport for decades. Here are the three supplements that consistently earn a spot in that conversation.

Longevity is a broad topic. For athletes, it isn't just about living longer and slowing down while you do so, it's about staying strong, recovering well, and continuing to train at a high level for as long as possible.

And when you look at the supplements getting the most attention in longevity research, a few should already look familiar: NAD+, creatine, and collagen.

Two of those are probably already part of your training routine. Here's why they're increasingly being looked at through a much bigger lens, and what else is worth considering.

NAD+: your cells' energy currency

Natural NAD+ levels decline by almost 50% by age 40, and NAD+ is critical for turning food into usable energy and repairing cells after stress. That decline is part of why recovery starts taking longer, even when training hasn't changed.

What to know: NAD+ is what your cells use to make energy and repair damage. Every hard workout, every bad night of sleep, every year you get older, your levels drop. And when NAD+ drops, recovery slows down and energy production takes a hit.

You can't just take NAD+ directly (it doesn't absorb well). You have to take a precursor your body converts. Most supplements use NR. This one uses NMN, which is one step closer to NAD+, and newer research shows your cells can pull NMN in directly and start making NAD+ fast.

This is also the only liposomal NMN we've seen anywhere, which matters because liposomal delivery means way better absorption. You're actually getting what you pay for.

Quicksilver NAD+ Gold - what to expect from it: better energy on long days, faster bounce-back from hard blocks, and clearer head, especially if you're an athlete over 35 who's noticed recovery isn't what it used to be.

TruNiagen - the most clinically studied NAD+ supplement available. Patented Niagen® nicotinamide riboside, shown to raise NAD+ over 50% at a 300mg daily dose.

Creatine: not just for lifting days

Creatine is one of the most researched supplements, and its benefits go beyond the gym. It also supports cognitive function under fatigue, which matters deep into a long race or a hard training block.

Feed Lab Creatine Monohydrate - the research-backed 5g dose, NSF Certified for Sport, at $0.25 a serving. No reason to overpay for this one.

Collagen: for the joints and connective tissue

Collagen production slows with age, and tendons, ligaments, and joints feel it first, especially under serious training volume.

SwissRX Collagen - three pharmaceutical-grade collagen peptides (Fortigel®, Tendaxion®, Mobilee®) at the exact doses used in the clinical trials, not a fraction of them.

The bonus most people skip: Glutathione

Glutathione is the body's own antioxidant, and it takes a hit from heavy training, travel, and everyday stress. Most of it breaks down in the stomach before it ever reaches your cells.

Quicksilver Glutathione - liposomal delivery so it actually gets where it needs to go. Best reached for during heavy training blocks or a lot of time spent outside.

Want it all in one pouch?

Momentous Longevity - a single formula combining Niagen®, NAC, PureQQ®, Betaine, Vitamin C and B Vitamins for anyone who wants fewer bottles on the counter.

You don't need to take everything on this list. Start with the areas that matter most to you and build from there.

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