Ethos can really be taken anytime of day to help boost your overall protein intake and reduce protein anxiety if you're struggling to get enough protein from your meals. But if you are looking for a specific result like kick starting the recovery process, then supplementing post workout would be beneficial. Or, if you’re recovering from a musculoskeletal injury like a sprain or tear, research suggests taking collagen 45 - 60 mins pre workout or rehab session could be really beneficial for driving the amino acids to the site of injury for optimised repair.