What is the Most Abundant Nutrient in Milk? The Surprising Answer
                                
                                
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                                    3 min read                                
                            
                                Consisting of about 87% water, milk's most significant *solid* component is often a topic of nutritional interest. If you've ever wondered what is the most abundant nutrient in milk, the answer, surprisingly, is not calcium, but rather the natural sugar known as lactose.