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MC4R Gene

Shop specific, nutrigenomic products that provide targeted nutrition to support this genetic pathway. 

The major driving force behind obesity in modern society is overeating, which is largely coded in genes that are responsible for appetite and satiety regulation. Appetite is the desire to eat while satiety refers to the sensation of fullness after eating. MC4R is one of these genes. MC4R codes for a protein called melanocortin 4 receptor, which is mainly found in the hypothalamus of the brain, an area responsible for controlling appetite and satiety. The human body has many sensors for energy levels. When it senses high energy levels, it sends out “satiety signals” to activate the neurons through the melanocortin 4 receptor to alert the body that it’s full. When the body senses low energy levels, “hunger signals” activate the neurons, also through the melanocortin 4 receptor, to produce the feeling of hunger.

Mutations in MC4R are the most common genetic cause of obesity. Many MC4R mutations have been documented. Some reduce gene function, some eliminate function altogether. While these mutations account for about 6-8% severe inheritable obese symptoms, they are relatively rare in general population.

One common variant of the MC4R gene, carried by 22% of the general population, causes reduced MC4R protein level in the hypothalamus of the brain. Carriers of this variant have both increased appetite and decreased satiety. They tend to eat larger amounts of food, snack more frequently and like to eat fatty foods (ref: GB Health Watch).

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