Whey protein powder (10-40g/day) is usually taken in combination with resistance exercise, as it has the exact aminoacid profile for this purpose. Hydrolysed collagen protein (5-20g/day) is usually taken to help support joints and maintain/boost skin firmness, sometimes in combination with radiofrequency treatment, as it has the exact aminoacid profile for this purpose (more glycine, proline and hydroxyproline). Hydroxyproline, specifically, is only found in skin / hydrolysed collagen protein…