Hi guys,

One of the most common protein shakes in the UK is 'Metrex' or 'Metrx'.

I've been taking this for a while, I've seen progress in my muscle mass and was wondering, is their a majour difference in terms of ones mass, whether you take it or not?

Does anyone use/tried this brand before?

Are your 'protein shakes' partially responsible for your muscle gain or is it simply from attending the gym regulary and protein from foods?