Does Slow Cooking Make Food Healthier? What Low, Moist Heat Does to AGEs

What are advanced glycation end products?

Advanced glycation end products are compounds that form when sugars bond to proteins or fats without an enzyme steering the reaction. The same chemistry, the Maillard reaction, browns a steak crust and toasts bread, which is why AGEs are abundant in food cooked at high, dry heat. Your body also makes AGEs on its own, and makes more of them when blood sugar runs high. Once formed, AGEs can stiffen long-lived proteins such as collagen and bind to a receptor called RAGE, which switches on inflammatory signaling. A 2016 systematic review of randomized controlled trials found that a high-AGE diet raised circulating AGEs and tumor necrosis factor-alpha, an inflammatory marker, across the groups studied, while noting that more high-quality trials are still needed (Nutrients, 2016). AGEs are a normal part of cooking chemistry. They become a concern when they arrive in large, steady doses, day after day.

How much does cooking method change the AGEs in food?

The most detailed food database on AGEs comes from a 2010 study that measured hundreds of foods prepared in different ways (Uribarri et al., 2010). Dry heat increased new AGE formation 10 to 100 times above the uncooked state across food categories. Animal foods rich in fat and protein were the most AGE-prone, while vegetables, fruits, whole grains and milk stayed relatively low even after cooking. The researchers also found that new AGE formation dropped with moist heat, shorter cooking times, lower temperatures and acidic ingredients such as lemon juice or vinegar. A 2025 randomized crossover trial then tested the idea in people. Using identical ingredients, meals prepared by boiling and steaming lowered serum AGEs and improved lipid profiles compared with the same meals grilled or baked (Cell Reports Medicine, 2025). Same food, different method, measurably different blood work.

Is a slow cooker a low-AGE way to cook?

No study has tested a slow cooker head to head against a grill, so honesty first: the evidence covers the conditions a slow cooker creates rather than the appliance itself. Those conditions match every AGE-lowering factor in the 2010 database. A slow cooker holds food in liquid, at a far lower temperature than an oven set to roast or a pan set to sear, and the lid traps steam so the surface never dries out and browns. Braising, stewing and simmering belong to the same moist-heat family as boiling and steaming. The one catch is the step many recipes add first. Browning meat in a hot pan builds flavor, and it builds AGEs. Keeping that sear brief, or skipping it, keeps the whole dish in low-AGE territory. Tomatoes, wine, lemon or vinegar in the pot help too, because acidic ingredients reduced new AGE formation in the same research.

What happens in the body when you eat fewer AGEs?

A 2017 meta-analysis pooled 17 randomized controlled trials with 560 participants who ate low-AGE diets (Scientific Reports, 2017). Low-AGE eating decreased insulin resistance, lowered total cholesterol by about 8.5 mg/dL and LDL cholesterol by about 2.4 mg/dL, and reduced inflammatory and oxidative markers including tumor necrosis factor-alpha, 8-isoprostane and circulating AGEs, while adiponectin rose. It did not change body weight, fasting glucose, HbA1c, HDL cholesterol or blood pressure, so this is not a weight-loss strategy and should never be sold as one. A 2023 review focused on aging reached a similar view: many small clinical trials suggest that cutting dietary AGEs improves insulin resistance, and changing culinary technique is a feasible, safe way to do it, although large trials are still missing (Cells, 2023). The effects are modest, they are real, and acting on them costs nothing.

Why do AGEs deserve more attention after menopause?

Menopause does not create AGEs, but it changes the ground they land on. After estrogen falls, insulin resistance becomes more common and LDL cholesterol tends to climb, which is exactly where the low-AGE trials showed effects. Our guides to insulin resistance in menopause and why cholesterol changes after menopause explain those shifts. Researchers have also looked at AGEs in the reproductive system itself. A 2017 review in the journal Menopause described AGEs and their receptor in human ovarian tissue and proposed that glycation damage may contribute to ovarian aging, while stressing that more research is needed (Menopause, 2017). Brain health is the other thread. In 684 older adults followed for about 3 years, higher dietary AGE intake was linked to faster decline in episodic memory and perceptual speed (Nutrients, 2022). That is an association, not proof, but it fits what we know about menopause, memory and brain fog.

Which foods carry the most AGEs, and which carry the fewest?

The 2010 database gives a clear ranking. The highest loads came from high-fat, high-protein animal foods cooked with dry heat, such as grilled or broiled meat, fried chicken and bacon, along with butter and hard cheeses. The lowest came from vegetables, fruits, whole grains, legumes and milk, which stay low even after cooking, and from fish and poultry that are poached, stewed or steamed rather than grilled. That list will look familiar if you have read about the diet pattern that protects your heart in menopause: beans, vegetables, olive oil, fish and poultry in moderate portions. What AGE research adds is the method. A chicken thigh braised with tomatoes and chickpeas and the same thigh charred on a grill look similar on a nutrition label and are very different in AGEs. If inflammation is what worries you most, pair this with anti-inflammatory eating for menopause.

My Perspective

I love a good sear as much as anyone, so let me be clear: nobody needs to fear the occasional grilled salmon. What this research changed for me is the default. For years, my idea of a virtuous dinner was a grilled chicken breast, which it turns out sits near the top of the AGE chart. The women I talk to after 50 already have plenty on their plates, literally, and they do not need another list of banned foods. Changing the pan is easier than changing the menu. Low, moist heat keeps the chicken, the beans and the olive oil you were already eating, and it simply stops manufacturing extra glycation products on the way to the table. It is also forgiving on tired evenings, which matters more than any study. That thinking is why my new book, The Mediterranean Slow Cooker Cookbook for Seniors, is built around braises, soups and stews sized for one or two. The bigger hormonal picture, from insulin to sleep, lives in Estrogen Left the Chat: Biohacking Menopause.

Not sure which of your symptoms are hormonal in the first place? The free Receipts symptom decoder helps you track the pattern, or start with the 60-second quiz.

A note from Marilyn: This article is educational and does not replace medical advice. If you have diabetes, kidney disease or heart disease, talk with your doctor or a registered dietitian before changing how you eat. I am a nutrition specialist, not a physician.

Frequently asked questions

Is slow cooking healthier than grilling?

For advanced glycation end products (AGEs), usually yes. Grilling, broiling and roasting use dry, high heat, which can raise a food's AGE content 10 to 100 times above its raw state, according to a 2010 food database study in the Journal of the American Dietetic Association. Slow cooking uses low, moist heat, the conditions that same study linked to far less AGE formation. Browning meat before it goes into the pot adds AGEs back, so keep that step short or skip it.

Do low-AGE diets help with weight loss?

The trial evidence says no. A 2017 meta-analysis of 17 randomized controlled trials in Scientific Reports found that low-AGE diets lowered insulin resistance, total cholesterol and LDL cholesterol, but did not change body weight, fasting glucose, HbA1c or blood pressure. Cooking to keep AGEs low is a way to reduce inflammatory and metabolic strain, not a weight-loss method.

Does browning meat before slow cooking add AGEs?

Yes. Searing meat in a hot, dry pan is the kind of high-heat cooking that forms advanced glycation end products quickly, especially in fatty, protein-rich cuts. Keeping the sear brief, or skipping it and building flavor with herbs, garlic, tomatoes or a splash of vinegar, keeps a slow-cooked dish lower in AGEs. Acidic ingredients such as lemon juice and vinegar also reduced new AGE formation in cooking research.

Why should women after menopause care about dietary AGEs?

Insulin resistance and LDL cholesterol both tend to rise after menopause, and those are among the markers that improved when people ate low-AGE diets in randomized trials. Cutting dietary AGEs by cooking with low, moist heat is a safe, inexpensive habit that fits a Mediterranean-style diet and does not require giving up any food group.