If you eat the same amount of food with the same carbs, fats, and calories—but just change how many AGEs (chemicals formed when food is cooked at high heat) are in it—for six weeks, your blood sugar,...

Eating more of the kinds of foods that have extra AGEs—like grilled or fried meats—for six weeks doesn’t seem to raise the levels of a specific marker in the blood or urine of healthy middle-aged and older adults, meaning those foods probably don’t make your body’s AGE burden much worse than it already is.

In mice on a low-calorie diet, the type of fat they eat might affect how long they live — less polyunsaturated fat and more saturated or monounsaturated fat could help them live longer.

The link between muscle mass or calorie burn and how much you eat gets weaker the older you get.

People who eat more Omega-3 fatty acids, like those found in fish, tend to age more slowly according to a biological age measure. For every extra gram of Omega-3 they eat daily, their biological age looks about 0.07 years younger than expected.

Eating more or fewer AGEs—chemicals found in grilled or fried foods—for six weeks doesn’t seem to change inflammation levels in healthy people aged 50 to 69, so short-term diet changes like this probably don’t affect body-wide inflammation.