The Skin Longevity Letter № 004 — The caramel problem: how sugar stiffens the scaffolding
The caramel problem: how sugar stiffens the scaffolding
Glycation is the slow welding of your collagen — why the sweetest habit shows up as stiffness, not softness.
The clinical dermatology literature on sugar and glycation, plus collagen biochemistry showing what happens after the bond forms — and why glycated collagen resists the very enzymes meant to remodel it.
What it found
Excess sugar bonds to collagen in a permanent process called glycation, forming Advanced Glycation End-products — AGEs. Cross-linked collagen is stiffer and, critically, resistant to matrix metalloproteinases: the scaffolding can no longer be remodeled.
What it means
Skin stiffness, laxity and slower repair are not only "collagen loss" — they are collagen jam. This is the Bone vector in its purest form: the scaffolding doesn't just weaken, it locks. And diet pattern — especially glycemic instability — is the input you control most.
Your one action
Flatten the spike, don't banish the food: never eat fast carbohydrates naked. Pair them with protein, fat, or fibre — the glucose curve, not the sugar itself, is what drives glycation.
“A sugar molecule that bonds to collagen does not ask permission to leave.”— The Skin Longevity Letter
