Skin glycation: what it is and how to slow it down

Sometimes we go through a period when we do not feel comfortable in our own skin. Or we return from vacation and find it thicker and harder, with dull tones and deep dark circles. Skin that seems to have lost its energy—dull and lacking vitality.

Behind this condition there is often a precise and little-known biological mechanism: glycation. Let’s look at what it is, why it affects the appearance of the face, and how it can be slowed down by acting both from within and through targeted treatments.

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Glycation: what it is and why it matters

The way we treat the skin topically affects its appearance, but the cause of the main signs of aging often lies elsewhere: in an unbalanced lifestyle and a diet rich in sugar, simple carbohydrates, and fried food.

Glycation occurs when sugars such as glucose and fructose form non-enzymatic bonds with proteins and lipids, creating altered molecules called AGEs (Advanced Glycation End Products), or glycotoxins.

In addition to the food itself, preparation methods also matter: browning and frying promote the formation of AGEs. Smoking and UV rays are also risk factors.

How glycation affects the skin

During the process, glucose and fructose bind to the amino acids of the two key proteins in the skin: collagen and elastin. These proteins are found in the extracellular matrix, which holds cells and tissues together.

Collagen maintains firmness and elasticity, while elastin allows the skin to return to its original shape after being stretched or contracted.

The damage that glycation causes to collagen and elastin fibers cannot be reversed or repaired. However, its progression can be slowed, which is why it is worth understanding how it works.

Proteins saturated with AGEs lose their ability to function properly with surrounding cells and proteins, resulting in skin laxity and the appearance of wrinkles. Glycation also induces oxidative stress, meaning an imbalance between free radicals and antioxidants, causing further cellular damage.

In practice, the proteins most exposed to glycation are the same ones that keep a youthful complexion elastic and firm. When they bind to sugars, they become weaker and less flexible, and the result shows on the surface as wrinkles, sagging, and loss of radiance.

The anti-glycation diet: what really matters

When it comes to food, you do not need a special diet, but you should know where AGEs are concentrated. Two things matter: how much sugar is circulating and how the food is cooked.

The cooking method matters as much as the ingredient

This is the least well-known aspect and perhaps the most useful. High-temperature, dry cooking methods—frying, grilling, oven cooking with intense browning, and searing—multiply AGE formation in food, even when the food itself is healthy. Moist cooking methods at lower temperatures—steaming, boiling, braising, and stewing—produce far fewer.

A practical measure that reduces AGE formation in meat is marinating it with an acidic ingredient, such as lemon juice or vinegar, before cooking.

The foods that have the greatest impact

An honest clarification: research on dietary AGEs is evolving, and AGEs produced internally through metabolism are just as significant as those introduced through food. This does not make paying attention to your diet pointless, but it puts the idea that an “anti-glycation diet” alone can stop the process into perspective: overall blood sugar stability over time matters more.

How to slow down the glycation process

Eliminating sugar from the diet is not the solution: sugars are essential for the cells’ energy metabolism. Glycation occurs naturally throughout life, even when eating healthily.

It cannot be stopped, but it can be slowed down. A multifaceted approach is needed:

• reducing simple sugars and favoring complex carbohydrates such as rice and whole-grain bread, which are converted into glucose more slowly;
• considering with your doctor a carnosine supplement, a dipeptide shown to protect against AGE accumulation;
• support the skin with topical active ingredients that stimulate collagen and elastin and counteract oxidative stress.

Active ingredients that help counteract glycation damage

From a cosmetic perspective, ingredients are needed that act on two levels: stimulating the synthesis of new collagen and protecting existing collagen from degradation.

Collagenetic Serum works precisely in this direction: it combines plant-based biotechnological collagen, gardenia stem cells that reduce collagenase activity, and Kudzu, which supports cell turnover. The formula is completed by a blend of hyaluronic acid with different molecular weights.

On the antioxidant front, a serum with Vitamin C and Ferulic Acid helps counteract the free radicals generated by the process, protecting the remaining fibers.

Recognizing a stressed skin barrier

Glycation is not the only cause of dull skin. It often coexists with a struggling skin barrier, identifiable by several signs:

• redness;
• inflamed skin;
• pronounced dryness;
• dehydrated skin;
• irritation and itching;
• dull complexion;
• burning during product application.

The skin barrier is both resilient and delicate. If too many treatments are used, the skin does not have time to repair itself. To help it regain balance, it can sometimes be better to subtract rather than add: reduce active ingredients, avoid irritating products, and do not overload the skin with makeup.

When the face looks tired, people tend to cover everything with makeup, but the result is often the opposite: the skin looks drier and thicker, and pores and lines become more pronounced. It is better to add moisturizing products that respect the skin’s balance.

Fatigue from glycation or stress?

It is worth distinguishing between them, because the strategy changes. Glycation is a process linked to sugars and lifestyle that affects the skin’s structure over the long term. Stress and high cortisol levels, on the other hand, act more quickly, causing puffiness, redness, and a loss of radiance that can appear and subside within a short time.

The two conditions often coexist, and in that case the most effective approach is neurocosmetic: working on both the structure and the stress response.

Frequently asked questions about glycation

What causes glycation?

It is caused by the spontaneous binding of circulating sugars — glucose and especially fructose — to the body’s proteins, without the involvement of enzymes. In the skin, the main targets are collagen and elastin. The process is physiological and occurs in everyone, but it accelerates with a diet rich in simple sugars and heavily cooked foods, smoking, and unprotected sun exposure.

Which foods make the skin age fastest?

Those that combine sugars and high temperatures: fried foods, highly browned industrial baked goods, processed meats, packaged snacks, and sugary drinks. Cooking also makes a huge difference: the same meat produces far more AGEs when grilled than when steamed. Conversely, vegetables, legumes, fish, and whole grains cooked slowly in liquid remain the most beneficial choice.

Which vitamin keeps the skin from aging?

No vitamin can stop aging, but two have strong evidence for slowing its visible signs. Vitamin C is the best documented: it is an antioxidant and directly contributes to collagen synthesis, so it works on both processes involved in glycation. Vitamin E complements it by protecting membrane lipids, and the two enhance each other in formulations, often together with ferulic acid.

What are the effects of glycation on collagen?

Sugars create abnormal cross-links between collagen fibers, making them rigid and fragile instead of elastic and smooth. Glycated collagen also resists normal enzymatic breakdown, so it remains in place longer than it should, hindering its replacement with new fibers. The visible result is less firm skin, more pronounced wrinkles, and a loss of tone that becomes more noticeable over time.

How is glycation measured?

There is no routine test for skin glycation. The most widely used clinical indicator is glycated hemoglobin (HbA1c), a blood test that reflects average blood glucose levels over the previous two to three months and is therefore a good indirect indication of how much glycation is occurring in the body. It is a test prescribed and interpreted by a doctor, not a cosmetic test.

Do anti-glycation creams work?

A cosmetic product cannot break bonds that have already formed: that damage is irreversible. What well-formulated products really do — and this is a tangible result — is address the processes still underway: stimulate new collagen production, limit the activity of enzymes that break down existing collagen, and reduce the oxidative stress that accompanies the process. With consistent use, the difference in firmness and radiance becomes visible, but it must be supported by managing sugar intake: cream alone addresses only half the problem.

In conclusion

Skincare is essential, but it should be supported by a balanced lifestyle — without giving up life’s pleasures. For your skin to function at its best, it needs nourishment, hydration, and controlled sugar intake.

You can also find LeLang products at partner pharmacies throughout Italy.