Chocolate Collagen Shake - UK Grass-Fed | DR GUS nutritionFormulated by Dr. Paul Sumners, PhD Physiologist developed by a PhD physiologist with 30+ published research papers in whole food collagen nutrition. DR GUS nutrition Chocolate Collagen Shake is a grass fed collagen rich shake powder with a smooth chocolate flavour, made for people who want an easy way to add whole food collagen nutrition to their daily routine. Mix with water, milk or your preferred drink, or blend into smoothies for a simple