Lentils contain methionine, an essential amino acid, but the body absorbs less of it than the total amount listed in nutritional data due to natural compounds in lentils or how the digestive system...
Mechanism
Synthesis from 1 study
Your body can't use all the methionine in lentils because there's too little of it compared to other amino acids, so it burns the methionine instead of using it to build proteins. Adding rice fixes this by providing more methionine, letting your body use it properly.
Most probable mechanism
When you eat lentils, your body doesn't get to use all the methionine inside them because there's not enough of it compared to other amino acids. This imbalance tricks your body into thinking it doesn't have enough building blocks to make proteins, so it burns the methionine for energy instead of using it to build muscle and tissue. When you eat lentils with rice, the rice adds more methionine and balances things out, so your body can finally use the methionine to build proteins instead of wasting it.
Lentils contain methionine but in insufficient quantity relative to other indispensable amino acids, creating a limiting amino acid profile.
The imbalance causes the liver and tissues to oxidize excess amino acids, including methionine, because protein synthesis cannot proceed without a balanced supply of all required amino acids.
Methionine oxidation increases as a result of this imbalance, reducing its metabolic availability for tissue protein synthesis.
The metabolic availability of methionine from lentils is measured at 69%, indicating that nearly one-third of ingested methionine is not retained for protein synthesis due to catabolism.
Evidence from Studies
Supporting (1)
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