The debate around whether plant-based or animal-based protein is better for building muscle has been ongoing for years. While many fitness enthusiasts believe animal protein is superior, recent insights from Dr Karan Rajan suggest the reality is more nuanced, especially when considering long-term results.
Protein plays a vital role in muscle repair and growth, but not all sources are viewed equally. Animal protein is often considered more effective in the short term because it provides a complete profile of essential amino acids and is absorbed more quickly by the body. According to Dr Karan Rajan, meals containing animal protein can lead to a higher spike in muscle protein synthesis and faster amino acid delivery compared to plant-based options.
This difference is partly due to the presence of fibre in plant foods, which slows digestion and reduces the speed at which amino acids enter the bloodstream. As a result, animal protein may offer a temporary advantage immediately after consumption.
However, when looking beyond individual meals, the gap between plant and animal protein becomes far less significant. Over several days, the body maintains a steady pool of amino acids, allowing it to adapt regardless of the protein source. Research indicates that overall muscle protein synthesis remains nearly identical when total daily protein intake is consistent.
The key factor for muscle growth is not whether protein comes from plants or animals, but whether the body receives enough essential amino acids, particularly leucine. As long as dietary intake meets these requirements, both sources can effectively support muscle development.
Dr Karan Rajan highlights that two elements have the greatest impact on building muscle: regular resistance training and total protein consumption. He recommends a daily intake of approximately 1.2 to 1.6 grams of protein per kilogram of body weight to support optimal muscle growth.
Ultimately, consistency matters more than protein type. Whether choosing plant-based diets or animal-based foods, individuals can achieve similar long-term results by maintaining adequate protein intake and following a structured strength training routine.
