Study: Cutting Two Amino Acids Helps Burn Fat Without Exercise
Danish scientists have discovered that a diet restricted in methionine and cysteine can activate the body's natural fat-burning mechanism. Experiments on mice showed that reducing these two amino acids in their diet increased energy expenditure by 20%, equivalent to the weight loss effect observed when the body is continuously exposed to 5 degrees Celsius. The mice did not eat more or exercise more; they simply generated more heat. These two amino acids are abundant in meat, eggs, and dairy but scarce in plant-based foods. The study, published in the journal eLife, opens new avenues for obesity treatment.
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This research is significant because it reverses the traditional approach to obesity treatment. Instead of trying to make the body "think" it's cold, the research team at the University of Southern Denmark demonstrated that diet alone can activate thermogenesis.
The breakthrough lies in beige adipose tissue – a type of fat located under the skin that both stores and burns energy. Previously, science primarily focused on brown fat in infants. However, beige fat exists in adults and can be "switched on" through diet.
The pharmaceutical industry is pouring billions of dollars into drugs like Wegovy and Ozempic to control weight. These medications work by reducing appetite but come with high costs and side effects. The new discovery points to another path: modifying nutritional composition instead of chemical intervention.
Interestingly, the study inadvertently explains why vegans often tend to be healthier. They naturally consume less methionine and cysteine. However, this is not an immediate call for everyone to stop eating meat. The new research was conducted on mice and has not yet undergone clinical trials in humans.
The big question is whether humans can tolerate a diet restricted in animal protein for an extended period. Methionine and cysteine are essential amino acids – the body cannot produce them on its own. Excessive restriction could lead to malnutrition.
The research team proposes developing "functional foods" – natural functional foods low in these two amino acids. They also...