Cardiologist explains 'what is really to blame for your stubborn weight gain' and it is not slow metabolism

Slow metabolism gets blamed for everything, according to the US cardiologist, who warned against oversimplifying and getting to the root cause of weight gain.

Dr Sanjay Bhojraj, a US-based cardiologist, took to Instagram on July 17 to share how muscle plays a huge role in metabolism. Muscle is one of the most metabolically active tissues in the body and after age 30, muscle loss can significantly impact metabolism, he said.

According to Dr Bhojraj, losing muscle mass can slow down metabolism, making weight management harder. He added that the concept of 'fixing your metabolism' is often oversimplified in weight loss and wellness discussions, but understanding what drives metabolism is key to making meaningful changes. What you eat influences metabolism, including protein intake for muscle maintenance.

Muscle = metabolism

The cardiologist went on to explain 'what is actually happening', and said, “The real reason it is slowing down is not just age or hormones – it is muscle loss. Muscle = metabolism. And most people are losing it fast. Speed comes from strength.”

‘No muscle = no metabolic engine’

In his caption, he added, “We’ve blamed a slow metabolism for decades. But it’s time we talked about muscle. Muscle is your most metabolically active tissue. And after 30, you start losing 3–8 percent per decade. No muscle = no metabolic engine. Here’s what’s really to blame for stubborn weight gain:→ Muscle loss → Hormonal shifts → Poor protein timing → Sedentary lifestyles. If we want to 'speed up metabolism', we have to protect and prioritise muscle.”

If you think your slow metabolism is hindering your weight loss journey, click here to learn about top 10 foods that help burn fat.

Note to readers: This article is for informational purposes only and not a substitute for professional medical advice. Always seek the advice of your doctor with any questions about a medical condition.