Age reversal has mostly been a dream we point at — a someday. This month, it got a little less someday.

A team backed by Google's longevity company just did something scientists have been calling impossible since the 1980s: they took a specific kind of aging damage that was considered permanent and reversed it in human tissue. Not slowed it. Not prevented it. Reversed it.

Now — I want to be the guy who tells you the truth about this, not the guy who oversells it. The headlines are already getting breathless, and some of what's circulating isn't quite right. So let me give you exactly what happened, why it genuinely matters, and why I think it's a bigger deal than it looks.

What They Actually Did

The company is Revel Pharmaceuticals, working with Calico (that's Alphabet's — Google's — longevity company) and the University of Colorado. Their study was published in Nature Communications on July 14, 2026.

They built an engineered enzyme called CMLase. Its job is to target one specific villain in the aging story: a type of damage called CML (carboxymethyl-lysine), which is an advanced glycation end product, or “AGE.”

Here's the simple version: glycation is what happens when sugar reacts with the proteins in your body — the same browning reaction that turns bread into toast, except it's happening slowly, inside you, over your entire life. It stiffens your arteries, ages your skin, clouds the lens of your eye. And the worst part? Once this particular damage was done, science believed it was there for good. Forever.

Revel's enzyme said otherwise.

The Results That Made the Researchers “Floored”

They tested CMLase on real human tissue from donors aged 20 to 75 — artery, skin, and eye lens. Here's what happened:

• In the artery of a 75-year-old donor, it removed over 70% of the CML damage.
• In aged skin, it removed more than 55% of the CML — bringing that specific marker below the level you'd normally see in a 31-year-old.
• In eye lens proteins, it cleared 45–78%.

The lead researcher said they were “pretty floored” — they'd expected maybe a 20% reduction and blew way past it.

Read that skin result again, because it's the one that stops people: a specific chemical marker of aging, in the skin of an elderly donor, rolled back to younger-than-a-31-year-old levels.

Now Let Me Be Honest About the Limits

Here's where I part ways with the hype, because your trust matters more to me than a flashy headline.

This is not a fountain of youth, and it's not even close yet. Three things you need to know:

1. It fixed one marker, not “the skin.” The enzyme cleared CML — one specific type of glycation damage. It did not erase wrinkles, rebuild collagen, or turn old skin into young skin. If you see a headline claiming “scientists reversed skin to age 35,” that's an overstatement. One molecular marker went back in time. The rest of the skin did not.
2. It was done in a lab dish, not in a living person. This was donated tissue, treated outside the body (scientists call it ex vivo). Nobody's living skin got younger. Big questions remain — can you deliver this enzyme into a living body, will the immune system reject it, will it reach the right tissues.
3. The researchers themselves stopped short of calling it age reversal. And I respect them for it.

So Why Am I Still Excited?

Because of the direction.

For forty years, this kind of damage sat in the “permanent, deal-with-it” column. It was considered a fixed cost of being alive. And a group of serious scientists — funded by Google — just moved it out of that column and into a new one: an engineering problem to be solved.

That shift is everything. The whole story of human progress is taking things labeled “impossible” and reclassifying them as “not solved yet.” Flight. Vaccines. Sequencing a genome. Every one of them was permanent and impossible right up until it wasn't.

This is one enzyme, clearing one type of damage, in a dish. It is a small step. But it's a real step — proof of principle that a wall we assumed was solid actually has a door in it. And here's what I've learned watching this field: one step doesn't stay one step. It attracts money, talent, and the next ten experiments. Progress compounds, the same way health habits do.

I plan to be around to see where this goes. That's the whole point of what I'm doing.

What This Means for You and Me Right Now

We can't get this enzyme yet — it's years and a lot of science away from being anything you or I could use. So what do we do today?

We fight glycation the way we already can: keep blood sugar stable, go easy on the sugar and ultra-processed foods, don't char your food to a crisp, and stack the daily habits that keep AGEs from piling up in the first place. Slowing the damage is still the game we can actually play right now.

But it's a good day when the thing you've been trying to slow turns out to be something science might one day undo.

The 200 Year Life was always a bet that the tools would arrive in time. This week, one more tool just showed up at the edge of the lab bench.

Stay sovereign, stay healthy,

Gary

A note from Gary: I'm not a doctor, and I'm definitely not your doctor. Nothing here is medical advice — this was early-stage laboratory research on donated tissue, not a treatment you can get, and not a claim that aging has been reversed in people. I'm sharing it because the direction excites me. Always check with your physician before changing anything in your routine.

If you're like me, you're always on the lookout for those small, everyday tweaks that can stack up to big wins in health and longevity. We talk a lot about nutrition, exercise, and mindset, but sometimes the real game-changers are hiding in your bathroom cabinet. Today, let's dive into something I recently switched up in my routine: making the switch to aluminum-free deodorant. Why? Because emerging concerns about aluminum's potential health impacts could be quietly chipping away at our long-term vitality. I'll break down the science, the risks, and the perks of going aluminum-free—all with an eye on how this fits into living a longer, healthier life.

What's Aluminum Doing in Your Deodorant Anyway?

First off, a quick primer. Most traditional antiperspirants (not just deodorants, which mainly mask odor) use aluminum compounds like aluminum chlorohydrate or aluminum zirconium to block sweat glands. They form a temporary plug in your pores, stopping sweat from reaching the skin's surface. Sounds handy for staying dry, right? But here's the thing: sweating is a natural process. It's how your body regulates temperature, detoxifies, and maintains balance. For those of us chasing longevity, anything that interferes with our body's innate functions deserves a second look.

Aluminum isn't just in antiperspirants—it's everywhere, from cookware to food additives—but the underarm area is particularly absorbent, especially after shaving. Studies show that while absorption is low (around 0.012% in some tests), repeated daily exposure adds up over decades. That's a lifetime of potential buildup, and in the context of the 200 Year Life, we can't afford to ignore cumulative effects.

Why Aluminum Might Be Sabotaging Your Health Span

Now, let's get to the heart of it: why is aluminum potentially bad news? The science isn't black-and-white—some reviews conclude it's safe in small amounts —but there's enough smoke to suggest a fire, especially for longevity enthusiasts who prioritize precaution over waiting for absolute proof.

One big concern is aluminum's possible link to breast cancer. Aluminum can mimic estrogen, a hormone that promotes cell growth, including in breast tissue. Some researchers theorize that aluminum absorbed through the skin near the breasts could alter estrogen receptors, potentially increasing cancer risk. While large reviews like one from 2014 found no definitive correlation, other studies highlight higher aluminum levels in breast tissue and suggest gene changes or oxidative stress from long-term exposure. A 2023 systematic review on daily aluminum exposure (including from antiperspirants) called for applying the precautionary principle, advising avoidance until more data is in.

Then there's the brain health angle, crucial for longevity. Aluminum has been implicated in neurotoxicity, with some studies linking it to Alzheimer's disease through oxidative stress and protein buildup in the brain.

While not proven causative, elevated aluminum levels have been found in Alzheimer's patients, and animal studies show it can cross barriers and accumulate over time. For those aiming for a sharp mind into our 100s and beyond, why risk it? Chronic low-level exposure could contribute to inflammation and cognitive decline, eroding the very years we're working to extend.

Other red flags include hormone disruption (as a “metalloestrogen”), skin irritation, and even potential ties to other conditions like Crohn's disease through bacterial-metal interactions. People with kidney issues are especially vulnerable, as they can't clear aluminum efficiently.

And on a simpler level, antiperspirants work by blocking sweat — and sweating is a natural process your body uses to regulate temperature. It's worth noting that sweat is mostly water and electrolytes (your liver and kidneys do the real detoxification work, not your sweat glands), so I'd be skeptical of anyone claiming deodorant “traps toxins.” For me the appeal is simpler: I'd rather not interfere with a normal bodily function every single day if I don't have to.

In the longevity game, it's about minimizing risks. Even if the evidence is mixed, with some bodies like the European Commission's SCCS deeming it safe at certain levels, the precautionary approach wins. Why gamble when alternatives exist?

The Longevity-Boosting Benefits of Going Aluminum-Free

Switching to aluminum-free deodorant isn't just about avoiding risks—it's about embracing benefits that align with a longer, vibrant life. Here's what I've noticed since making the change, backed by what the experts say:

1. Lets Your Body Sweat Normally: Without aluminum plugging your pores, your body can sweat freely and do its main job — regulating your temperature. I'm not going to tell you sweat “flushes out toxins” (that's mostly a myth — sweat is largely water and salt), but I do like the idea of not chemically shutting down a normal function day after day.

2. Gentler on Your Skin, Reducing Irritation and Inflammation: Aluminum can cause contact dermatitis or irritation, especially in sensitive folks. Natural alternatives often use ingredients like baking soda, arrowroot, coconut oil, or essential oils that soothe rather than inflame. Less chronic irritation means less systemic inflammation, a major driver of aging and diseases like heart issues or diabetes.

3. Hormonal Harmony and Overall Wellness: By sidestepping potential endocrine disruptors, you're supporting balanced hormones, which play a huge role in metabolism, energy, and aging.
Many aluminum-free options incorporate probiotics or botanicals that combat odor-causing bacteria naturally, promoting a healthier microbiome—another longevity key.

4. No More Yellow Stains or Harsh Chemicals: Practical perks matter too. Aluminum reacts with sweat to stain clothes, and free versions often skip parabens and synthetic fragrances, reducing overall chemical load. Plus, they're often eco-friendly, aligning with sustainable living that indirectly boosts health through a cleaner planet.

5. Long-Lasting Protection Without Compromise: Modern aluminum-free deodorants provide 6-12 hours of odor control under normal conditions, using natural absorbers and antimicrobials.
I've found them effective even during workouts, and the peace of mind? Priceless for long-term health.

In essence, going aluminum-free is a low-effort hack that could reduce your toxic burden, enhance detox, and minimize inflammation—cornerstones of extending your health span.

Making the Switch: Tips for Longevity Seekers

If you're convinced, start simple. Look for labels saying “aluminum-free” or “natural deodorant.” There are plenty of good options out there, from established natural brands to DIY mixes with baking soda and essential oils. There might be a “detox” phase where you sweat more as your body adjusts—hang in there; it passes in a week or two. Pair it with other longevity habits: stay hydrated to support sweating, eat antioxidant-rich foods to combat any oxidative stress, and get regular check-ups.

Remember, the 200 Year Life isn't about perfection—it's about informed choices that compound over time. Ditching aluminum is one more step toward that goal. Have you made the switch?

Drop your experiences in the comments—I'd love to hear how it's boosted your routine.

Stay strong, stay curious, and here's to many more years,

Gary Leland

A note from Gary: I'm not a doctor, and I'm definitely not your doctor. Nothing here is medical advice — the science on aluminum is genuinely mixed, and I'm sharing a precautionary choice I made for myself, not a diagnosis or a prescription. Check with your own doctor before changing anything in your routine.