Genetics of Obesity

🧬 Why Do Some People Gain Weight More Easily Than Others? The Role of Genetics in Obesity

Have you ever wondered why some people can eat lots of food and stay thin, while others gain weight even when they try to eat healthy? It might not seem fair—but science shows that part of the reason is something we can’t control: our genes.

💡 What Are Genes?

Genes are like tiny instruction manuals inside our bodies. They tell our body how to grow, how to look, and even how to use energy. We get our genes from our parents—half from our mom and half from our dad.

Just like genes decide our eye color or height, they also play a role in how our body handles food, hunger, and fat storage.

🧠 How Do Genes Affect Weight?

There are hundreds of genes that may be linked to weight. Some genes can:

• Make you feel more hungry or less full after eating

• Slow down your metabolism (how fast you burn calories)

• Tell your body to store more fat

• Make it harder for you to move around or stay active

One gene called FTO is well known. People with a certain version of this gene are more likely to become overweight. But having the gene doesn’t mean you will be overweight—it just makes it more likely.

🧬 Nature vs. Nurture: It's Not Just Genes

Genes are important, but they’re only part of the story.

Your environment—like the food you eat, how much you move, how much sleep you get, and even how stressed you feel—also plays a big role.

Think of it like this:

Genes load the gun, but lifestyle pulls the trigger.

That means even if you have genes that make weight gain easier, healthy habits can still make a big difference.

🍎 What Can You Do?

If obesity runs in your family, you’re not alone. Millions of people face the same challenge. But the good news is, you’re not stuck with the genes you have. Here’s what can help:

✅ Eat real, whole foods
✅ Move your body every day
✅ Get good sleep
✅ Ask your doctor for support—especially if you feel stuck

Sometimes, medical help like medication or special weight loss programs can be the missing piece—especially for people whose genetics make it harder.

Stay Healthy Stay Strong,

Dr. Leon Katz

Medical Weight Loss Specialist

This information is meant strictly for educational purposes.   Talk to your healthcare professional for further questions