The Trouble of the AGEs
Advanced Glycation End-Products (AGEs) are the result of the chemical process of glycation, which can occur in your body in response to certain foods you ate, or you can consume them directly, if you eat animal products that contained them (because we’re not special and other animals glycate too, especially mammals such as pigs, cows, and sheep).
As a double-whammy, if you cook animal products (especially without water, such as by roasting or frying), extra AGEs will form during cooking.
When proteinous and/or fatty food turns yellow/golden/brown during cooking, that’s generally glycation.
If there’s starch present, some or all of that yellow/golden/brown stuff will be a Maillard Reaction Product (MRP), such as acrylamide. That’s not exactly a health food, but it’s nowhere near being even in the same ballpark of badness.
In short, during cooking:
- Proteinous/fatty food turns yellow/golden/brown = probably an AGE
- Starchy food turns yellow/golden/brown = probably a MRP
The AGEs are far worse.
What’s so bad about AGEs?
Let’s do a quick tour of some studies:
- The role of advanced glycation end-products in retinal ageing and disease
- Advanced glycation end-products and their circulating receptors predict cardiovascular disease mortality in older women
- Elevated serum advanced glycation end-products in obese indicate risk for the metabolic syndrome: a link between healthy and unhealthy obesity?
- Increased levels of serum advanced glycation end-products in women with polycystic ovary syndrome
- Advanced glycation end-products and their involvement in liver disease
- Effects of advanced glycation end-products on renal fibrosis and oxidative stress
- Role of advanced glycation end-products and oxidative stress in vascular complications in diabetes
- Cancer malignancy is enhanced by advanced glycation end-products
- Advanced glycation end-products in the pathogenesis of Alzheimer’s disease
We could keep going, but you probably get the picture!
What should we do about it?
There are three main ways to reduce serum AGE levels:
Reduce or eliminate consumption of animal products
Especially mammalian animal products, such as from pigs, cows, and sheep, especially their meat. Processed versions are even worse! So, steak is bad, but bacon and sausages are literally top-tier bad.
Cook wet
Dry cooking (which includes frying, and especially includes deep fat frying, which is worse than shallow frying which is worse than air frying) produces far more AGEs than cooking with methods that involve water (boiling, steaming, slow-cooking, etc).
As a bonus, adding acidic ingredients (e.g. vinegar, lemon juice, tomato juice) can halve the amount of AGEs produced.
Consume antioxidants
Our body does have some ability to deal with AGEs, but that ability has its limits, and our body can be easily overwhelmed if we consume foods that are bad for it. So hopefully you’ll tend towards a plant-based diet, but whether you do or don’t:
You can give your body a hand by consuming antioxidant foods and drinks (such as berries, tea/coffee, and chocolate), and/or taking supplements.
Want to know more about the science of this?
Check out…
Advanced Glycation End-Products in Foods and a Practical Guide to Their Reduction in the Diet
