There is something I like about summer. Suddenly, those quiet little moments appear that seem impossible during the rest of the year. Twenty minutes to read an entire article, to delve into a topic, or simply to let an idea bounce around in your head for a while.
A few days ago, that is exactly what happened to me. I started reading a study about an enzyme called CMLase and thought it would be another one of those papers that ends up turned into exaggerated headlines about the definitive cure for skin aging. At Método R, we often say that "we like to know the latest and use the second-to-latest." Not because we distrust innovation, but because science needs time to prove which discoveries will truly change the way we care for our skin and which ones will end up falling by the wayside.
However, this time I kept reading. Not because I believed I was facing a revolution, but because the study posed a question that seemed much more interesting to me than any promise of eternal youth.
What if some of the damage caused by the passage of time to our skin were not as irreversible as we have always thought?
We don't have the answer yet. In fact, it will probably take many years to have it. But the question, in itself, is already worth it.
For decades, we have understood aging as a process in which the body accumulates damage. Some can be slowed down with a proper routine and lifestyle. Others simply seem to be part of the passage of time and must be accepted. That idea remains true, but the research published a few days ago introduces a nuance that interests me. Not because it announces the end of wrinkles or because we are close to a cure for aging, but because it shows that one of those types of damage, at least in the laboratory, could be reversible, opening a new path to investigate whether we will one day be able to repair some of the accumulated deterioration in tissues.
What is skin glycation?
To understand why this work has sparked so much interest, I am going to explain a concept that is talked about much less than sun damage or oxidative stress: skin glycation.
Glycation occurs spontaneously throughout life. Certain sugar molecules react with proteins like collagen or elastin, resulting in what are called advanced glycation end-products, known by their acronym, AGEs. It is not a process we can notice while it happens. It is slow, silent, and cumulative. But over the years, it leaves its mark.
Collagen fibers lose elasticity, tissues become more rigid, and the skin gradually loses part of its ability to repair itself. It is not the only mechanism involved in skin aging, by any means, but it is one of those that best explains why mature skin no longer responds the same way as young skin.
Among all those AGEs, there is one that is especially well-known: CML, or Nε-carboxymethyllysine. For years, it has been considered a kind of permanent mark. Once it appeared, it stayed there. It was one of those types of damage that biology seemed to accept as inevitable.
And this is where CMLase comes onto the scene. Researchers managed to design an enzyme capable of specifically recognizing that molecule and transforming it back into lysine, the original amino acid of the protein. In other words, they managed to repair molecular damage that until now was considered practically irreversible.
But keep in mind that what I am telling you happened in the laboratory. The experiments were performed on isolated proteins and human tissues obtained for research. Not on patients. That is a detail that may seem minor, but it completely changes the dimension of the finding because there is still a long way to go.
Those of us who follow biomedical research closely are accustomed to seeing extraordinary discoveries that, years later, never manage to become a treatment. We see the "hype" around molecules that even start to be used prematurely in cosmetics, and over time, it is seen that they are useless. Either because they do not reach where they need to reach or because they do not work as well in humans as they do in mice. Not because they were incorrect, but because the human body always ends up being quite a bit more complex than it seemed on paper.
In this case, exactly the same thing is happening. An enzyme like CMLase would have to survive inside the body, reach the appropriate tissue, act only where it should, and avoid being identified as a foreign element by the immune system (this is very important!). Solving all that usually takes much longer than discovering the molecule itself.
That is why it is best to read some headlines that already speak of "the enzyme that eliminates wrinkles" or the "beginning of the end of aging" with a certain degree of detachment. They are catchy phrases, but they tell a different story than what the study actually describes.
There is something else that I find much more interesting. For years, most research on aging has attempted to answer the same question: how do we make skin aging appear more slowly? Hence the importance of photoprotection, antioxidants, retinoids, or any strategy capable of reducing the impact of the sun, inflammation, or oxidative stress. That is indeed achieved effectively and has been proven.
This work, on the other hand, poses a different possibility. It does not ask how to prevent the damage from appearing, but whether we will one day be able to repair some of the damage that has already accumulated. It is a very subtle shift in perspective. And perhaps that is precisely why it is so interesting.
It does not modify what we should do today. In fact, if this study reinforces anything, it is the importance of continuing to prevent. Because, while science explores new paths, prevention remains the most effective tool we have.
Today we know that skin aging depends on many different mechanisms. Ultraviolet radiation, inflammation, oxidative stress, hormonal changes, collagen loss, and also glycation all participate, each in their own way, in that complex process we call aging. That is why we continue to insist on the same thing. Photoprotection remains the best investment we can make for our skin. Antioxidants, such as vitamin C, help reduce some of the oxidative damage. Retinoids continue to be the active ingredient with the most evidence for stimulating skin renewal and promoting collagen synthesis. None of that has changed.
The only thing that changes is that, for the first time in a long time, someone has shown that perhaps one of those accumulated types of damage is not completely irreversible.
Perhaps in ten or twenty years we will discover that this work was the beginning of a new way of understanding aging. Or perhaps it will remain a brilliant experiment that opened a line of research without ever being transformed into a treatment. Science is full of similar stories.
True progress rarely arrives all at once. It usually advances by asking better and better questions. And I believe that, precisely, is the great contribution of this study. Not to have found a solution yet, but to have formulated a question that until very recently seemed impossible.
