New Delhi, Oct. 30 -- The global fitness industry's love affair with protein-from carnivore diets to supplement shakes-may be coming under scrutiny again. A viral video by US-based cardiologist Dr Dmitry Yaranov has reignited debate over whether consuming excessive protein, especially from animal sources, could silently harm the heart.

In his Instagram post titled "This is how a high-protein diet can lead to a heart attack at 35," Dr Yaranov, who specialises in heart failure and transplantation, said he has treated several seemingly fit individuals who arrived in emergency rooms with no symptoms or prior warnings.

"He looks like a statue. Shredded. Vascular. Peak performance. But I've seen what's inside those vessels-and it's not pretty...