Protein Glycation: Why Your Body Gets Stiffer

Muscle and movement give the body energy and strength. Protein glycation is one process that can make structural tissue feel stiffer over time. Sugar is a driver of this process, not the only influence on stiffness in the body.

Think of collagen, the protein that helps keep skin smooth, joints springy and blood vessels stretchy, as a soft rubber band. When blood sugar stays high for long periods, sugar can attach to these flexible fibers. Over time, that process, called glycation, makes the rubber band more like a brittle plastic stick.

The simple picture

Flexible collagen helps tissue bend and recoil. Glycation creates sticky links that make it stiffer and less flexible.

The damaged, stiffened compounds are called AGEs: Advanced Glycation End-products.

1. What happens when sugar binds to protein?

When sugar in the blood sits next to long-lasting proteins for too long, it can attach. At first, that bond can be undone. With time, heat and pressure inside the body can lock it in more permanently.

The glycation pathway

Tendons, skin and blood vessels are not replaced quickly. That means these damaged proteins can remain for years and create two problems.

Problem 01

Physical stiffness

Blood vessels: stiff vessels make the heart work harder to push blood through the body and can raise blood pressure.

Joints and tendons: less springiness makes movement feel harder and can increase the chance of injuries such as tendinitis.

Problem 02

Internal irritation

The body can treat sticky, damaged proteins like unwelcome invaders. This triggers low-grade, ongoing inflammation that wears down tissues over time.

2. Where do these damaged proteins come from?

Your body gets or creates AGEs in two ways.

Two sources of AGEs

Inside the body

Frequent high blood sugar spikes after meals can create glycation inside the body.

From food

Heavily charred, crispy or deep-fried meats and fats cooked at high dry heat can contain AGEs.

3. Three simple everyday steps

You do not need a medical degree to reduce this load. Small changes in cooking, movement and meal order can help keep collagen softer and springier.

Area

The simple problem

The easy fix

Cooking methods

High dry heat creates lots of sticky AGEs on the surface of meat.

Use citrus or vinegar. Marinate meat in lemon juice, lime or vinegar before cooking. Choose moist cooking methods such as steaming, stewing or slow cooking.

Post-meal movement

Blood sugar spikes after eating feed the glycation process.

Take a 10-minute walk. A quick walk after lunch or dinner uses muscle to clear sugar from the blood before it can damage collagen.

Meal order

Eating carbohydrates first can cause sharper blood sugar spikes.

Eat vegetables and protein first. Eat vegetables and meat before rice or bread to slow how quickly sugar enters the blood.

The goal is not to fear sugar. It is to give the body fewer long, repeated opportunities to turn flexible tissue into stiff tissue.

Keep reading

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