❓Does eating vegetarian really leave you low on energy and stamina?

There's no evidence to support the idea that "eating vegetarian equals low stamina." In reality, a good number of elite endurance athletes are vegetarian or vegan — several professional marathoners, triathletes, and cyclists openly follow vegetarian or vegan diets and still perform at a high competitive level, in sports that demand far more stamina than everyday life does. Low energy is more commonly caused by things like: not eating enough total calories (a lot of people unintentionally under-eat when they first switch to vegetarian), not getting enough carbohydrates — the body's main energy source — or iron deficiency (which affects your blood's oxygen-carrying capacity and causes noticeable fatigue; this needs to be confirmed through testing and addressed with targeted supplementation, not just solved by vaguely "eating more meat"). As long as you're hitting your targets for total calories, carbs, protein, and iron, a vegetarian diet can absolutely support normal, even high-intensity, physical activity. If you're feeling low on energy, it's worth first checking whether you're actually eating enough of the right things, rather than blaming it on the broad direction of "eating vegetarian" itself.