Genes: are your genes to blame for your weight?

Have you ever wondered why two people can eat the same diet, exercise the same amount, and still carry their weight completely differently?

One stores it evenly. The other accumulates it around their abdomen.

The answer is partially written in your DNA.

In 2007, scientists scanning the entire human genome identified a gene called FTO, short for Fat Mass and Obesity Associated.

It was the first obesity-linked gene confirmed across multiple populations. But what FTO does is more nuanced than simply making you heavier.

FTO works like a molecular editor inside your cells. It controls how loudly certain instructions get read.

When it is active, it turns up the volume on signals related to hunger, fat storage, and the conversion of ordinary cells into fat cells.

The result is a body that is primed to store energy, particularly around the middle.

People who carry a specific version of this gene tend to eat more without realising it. They prefer higher-fat foods. They feel full later than most people.

Their brains are simply slower to receive the signal that enough has been consumed. The excess gets stored, and it tends to accumulate in the abdomen.

Each copy of the risk version of FTO raises obesity risk by approximately 20 percent and adds roughly 1.4 kilograms of body weight on average.

Carriers are not imagining their struggle. Their biology is working against them in measurable ways.

But this is not a life sentence.

Research consistently shows that regular physical activity substantially reduces the effect of FTO on body weight.

Exercise improves how your body responds to hunger signals, reduces inflammation in fat tissue, and recalibrates appetite over time.

The gene creates a predisposition. It does not create a destiny.

Your body distributes fat according to ancient instructions. Understanding which instructions you carry is the first step to deciding which ones to rewrite.

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