Listener Helen from Manchester got in touch to ask about Protein Powders, as she considered replenishing her supply that she’s been taking after long distance runs.

She wanted to know if Whey or Plant-based protein really can help her build and repair muscle, whether there’s a set amount she should be having, if one type is better than the other, or if she could just get the protein she needs from her food – and save on buying another bag?

Greg Foot brings back Professor of Human Physiology, Sport and Exercise Sciences at Liverpool, John Moores University, Graeme Close to answer Helen’s questions, tell us what our body needs and uses protein for, and whether it really can deliver ‘Gainz’ (with a Z.)