How long should 20g of protein last? A complete guide to absorption and utilization
                                
                                
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                                    6 min read                                
                            
                                Protein digestion rates vary dramatically based on the source; for example, fast-digesting whey protein can be absorbed at approximately 10 grams per hour, meaning 20g could take around two hours, while slow-digesting casein can take 6-7 hours. This significant difference highlights why answering the question of how long 20g of protein lasts is far from a simple, single number.