AGEs and Aging: Can Protein Damage Be Reversed?
Advanced glycation end products — AGEs — are a form of slow, cumulative chemical damage that builds up on your proteins over years, making tissues stiffer, less functional, and harder for your body to repair.
Advanced glycation end products — AGEs — are a form of slow, cumulative chemical damage that builds up on your proteins over years, making tissues stiffer, less functional, and harder for your body to repair. They are not a fringe concept: decades of research link high AGE burden to cardiovascular disease, kidney decline, diabetic complications, and accelerated biological aging. The short answer to whether you can do something about them is yes — but the degree to which you can reverse existing damage versus slow new accumulation is where the science gets genuinely interesting right now. A preprint published this week describing an engineered enzyme that can strip a specific AGE modification off proteins has set the longevity community buzzing, and for good reason — it is the first credible evidence that stable AGE adducts might be enzymatically reversible in human tissue. If you want to understand what that actually means for your body, or just want to know which everyday habits genuinely reduce AGE buildup, Vitals Vault has pulled together what the research actually supports. You can also run a metabolic panel through our labs or talk through your personal risk picture with a PocketMD clinician.
Why this is trending
The spark this week was a preprint describing a bacterial-derived enzyme called CMLase, which researchers engineered to target and remove a specific glycation tag — called CML, or carboxymethyllysine — from proteins in human tissue samples. A companion story about a so-called 'lawnmower enzyme' that clears molecular debris from aged cells spread simultaneously on Reddit's r/longevity community, and the two stories blurred together into a wave of excitement about reversing protein aging. The CMLase work is genuinely novel: prior research assumed that the most stable AGE modifications were essentially permanent once formed, so demonstrating enzymatic removal — even in a lab dish — is a meaningful scientific step. What is important to hold onto, though, is that this is early-stage preprint research, not a clinical therapy. The enzyme has not been tested in living humans, delivery to the right tissues remains an unsolved problem, and we do not yet know whether removing CML adducts from aged proteins actually restores their function. The excitement is justified as a proof of concept, but anyone selling you an 'AGE-reversing supplement' based on this week's news is running well ahead of the data.
What AGEs Actually Are
Sugar sticking to your proteins permanently
When glucose or other sugars react with proteins in your body, they kick off a chain of chemical reactions that eventually produce stable, cross-linking compounds — advanced glycation end products — that lock onto the protein and do not let go. Think of it like caramelization happening inside your tissues: the same browning chemistry that turns bread crust golden is a rough analogy for what happens to collagen, lens proteins, and arterial walls over decades.
A slow process that accelerates with high blood sugar
AGE formation happens in everyone, but the rate depends heavily on how much sugar is circulating in your blood and for how long. People with poorly controlled diabetes accumulate AGEs far faster than average, which is a big part of why diabetic complications — stiff arteries, cloudy lenses, kidney scarring — look so much like accelerated aging. Even in people without diabetes, years of mildly elevated blood sugar quietly push the process forward.
You also absorb AGEs directly from food
Your body produces AGEs internally, but you also take them in when you eat — particularly from foods cooked at high heat with dry methods like grilling, frying, or roasting. Dietary AGEs are not absorbed as efficiently as internally produced ones, but they still contribute to your total body burden, especially if your gut barrier is compromised. This is why cooking method genuinely matters, not just as wellness advice but as measurable biochemistry.
Lab testing
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Why This Is Trending Now
An enzyme that reverses stable glycation damage
The CMLase preprint is trending because it challenges a long-standing assumption: that the most chemically stable AGE modifications — specifically CML adducts — were essentially irreversible once formed. Demonstrating that an engineered enzyme can cleave them off proteins in human tissue samples is a genuine conceptual breakthrough, even if the path from lab dish to clinical therapy is long and uncertain.
The 'lawnmower enzyme' story amplified the moment
A separate but simultaneous story about an enzyme that clears molecular debris from aged cells spread through the same online communities at the same time, and many readers merged the two narratives into a single 'we can now reverse protein aging' headline. The two findings are related in spirit — both point toward enzymatic repair of age-related molecular damage — but they are distinct research threads, and conflating them overstates what either one has actually shown.
Longevity influencers connected it to everyday habits
Creators like Siim Land picked up the story and connected the enzyme research to the broader conversation about reducing AGE accumulation through diet and blood sugar control — which is where the science is actually most actionable right now. That framing is fair and useful, because even if enzymatic reversal is years away from clinical use, the habits that slow AGE buildup are available today and supported by solid evidence.
What the Evidence Shows
HbA1c is the most validated AGE-adjacent marker
Hemoglobin A1c [HbA1c] is itself a glycated protein — glucose attached to hemoglobin — and it has been studied for decades as a proxy for average blood sugar over roughly three months. High HbA1c is consistently associated with faster AGE accumulation across tissues, and reducing it through diet, exercise, or medication reliably slows the process. It is the most clinically actionable number you can track right now.
Dietary AGE reduction is real but modest
Randomized trials comparing high-AGE diets to low-AGE diets show measurable differences in circulating AGE levels and inflammatory markers, particularly in people with diabetes or kidney disease. The effect size in healthy people is smaller, but the direction is consistent: moist cooking methods like steaming, poaching, and slow-cooking produce dramatically fewer AGEs than dry high-heat methods, and that difference shows up in blood and urine measurements.
The CMLase enzyme research is promising but very early
The preprint showing enzymatic removal of CML adducts from human tissue proteins is a proof-of-concept finding, not a clinical result. It demonstrates that the chemistry is possible, which is genuinely new information — but the enzyme has not been tested in a living organism, and we do not yet know whether removing CML from aged proteins actually restores their mechanical or functional properties. Treating this as a near-term therapy would be premature.
AGE receptor signaling drives inflammation independently
Even before AGEs cause structural damage, they activate a cell-surface receptor called RAGE [receptor for advanced glycation end products], which triggers inflammatory signaling throughout the body. This means AGEs contribute to chronic low-grade inflammation — the same background fire linked to heart disease, cognitive decline, and metabolic dysfunction — not just through protein stiffening but through active immune provocation. Reducing AGE load therefore has potential benefits beyond tissue mechanics.
How to Reduce AGE Accumulation
Change how you cook, not just what you eat
Switching from grilling or frying to steaming, poaching, or slow-cooking the same foods can cut the AGE content of a meal by 50 percent or more, according to food chemistry studies. You do not have to give up browned or roasted foods entirely, but making lower-heat methods your default — and reserving high-heat cooking for occasional meals — adds up meaningfully over time. Adding an acid like lemon juice or vinegar to marinades also reduces AGE formation during cooking.
Keeping blood sugar stable is the highest-leverage habit
Because internal AGE production is driven by how much glucose is floating around your bloodstream and for how long, anything that flattens your blood sugar curve does double duty: it reduces new AGE formation and lowers the downstream inflammation from RAGE activation. Eating fiber before carbohydrates, taking a 10-minute walk after meals, and avoiding large refined-carbohydrate loads are all strategies with direct mechanistic relevance here, not just general wellness advice.
Some supplements have preliminary supporting data
Benfotiamine (a fat-soluble form of vitamin B1) and pyridoxamine (a form of vitamin B6) have shown AGE-inhibiting effects in animal studies and small human trials, particularly in diabetic populations. The evidence is not strong enough to recommend them broadly, and neither has been tested in the context of the new enzyme research. They are worth discussing with a clinician if you have elevated HbA1c or a strong family history of diabetic complications, but they are not a substitute for blood sugar control.
Risks and Caveats
Supplement marketing is already outrunning the science
Within days of the CMLase preprint circulating, products claiming to 'reverse glycation' or 'clear AGEs' began appearing in longevity forums. None of these products contain the engineered enzyme from the research — that compound is not available commercially — and the evidence for any oral supplement reversing existing AGE adducts in humans is essentially nonexistent. Be skeptical of anything marketed as an AGE-reversal product right now.
Aggressive blood sugar lowering carries its own risks
If you have diabetes or prediabetes and are considering intensifying your blood sugar management specifically to reduce AGEs, that conversation needs to happen with a clinician. Hypoglycemia — blood sugar dropping too low — is a real and sometimes serious risk, particularly with certain medications, and the right target range varies by individual. The goal is stable, healthy blood sugar, not the lowest number possible.
AGE skin autofluorescence tests are not standard care
Some longevity clinics offer skin autofluorescence testing as a way to estimate tissue AGE burden non-invasively, and while the research behind it is legitimate, it is not yet a standard clinical tool with validated reference ranges for the general population. HbA1c, fasting glucose, and inflammatory markers remain the most clinically meaningful and widely validated proxies for AGE-related risk that you can act on today.
Frequently Asked Questions
Can you actually reverse AGEs in your body?
Right now, the honest answer is mostly no — not in any clinically proven way. The new CMLase enzyme research shows it may be chemically possible to remove specific AGE tags from proteins, but that work is in the preprint stage and has only been demonstrated in lab samples, not in living humans. What you can do today is slow the rate of new AGE formation significantly through blood sugar control and cooking habits.
What foods are highest in AGEs?
Foods cooked at high heat with dry methods carry the most AGEs — think grilled meats, fried foods, roasted nuts, and processed snacks that have been baked or toasted. The same chicken breast steamed versus grilled can differ by a factor of five or more in AGE content. Dairy products, particularly aged cheeses and butter, are also relatively high, while most fruits, vegetables, and legumes are low regardless of cooking method.
Does HbA1c measure AGEs directly?
HbA1c measures one specific glycated protein — hemoglobin with glucose attached — so it is technically a type of AGE measurement, but it reflects only a three-month window of blood sugar exposure rather than your lifetime tissue AGE burden. It is still the most useful and validated clinical marker for tracking your AGE-related risk, because it tells you how fast new AGEs are forming right now. A fasting glucose test alongside it gives you an even clearer picture.
Is the 'lawnmower enzyme' the same as the CMLase enzyme?
No — these are two separate research findings that circulated at the same time and got conflated in online discussions. The CMLase enzyme specifically targets and removes CML glycation adducts from proteins. The 'lawnmower enzyme' story refers to different research about clearing molecular debris from aged cells through a separate mechanism. Both are interesting early-stage findings, but they are not the same discovery.
Should I take benfotiamine or other anti-glycation supplements?
The evidence for benfotiamine and pyridoxamine is real but limited — most of the human data comes from people with diabetes or kidney disease, and the effect sizes are modest. If you have elevated HbA1c or significant metabolic risk, it is worth raising with a clinician, but neither supplement should replace blood sugar management through diet and exercise. For most healthy people, the cooking and lifestyle changes described above will do more than any supplement currently available.