The body digests, transforms food, nutrients into blood into structure into function, into health or disease. You (health, disease, body odor, etc.) are what you eat, for better or worse. Better is the proper weight and circulation of energy, as too much or too little weight can cause energy and fluids to stagnate and fester causing strong, offensive body odor, sour, sweet, etc. The body is mornally sweet and sour in smell. The sweet smell comes from blood, food, nutrients, protein, water and sugar, which are sweet tasting. The sour smell comes from the stomach (digestion, fermentation) and or sour foods. The sweet and sour smells also produce a musty smell, odor. The stomach is the first digestive organ to receive and process food, nutrients. It mixes food and fluids with hydrochloric acid (HCl) and other enzymes, designed specifically to digest animal protein and fat. This mixture sits and ferments breaks down before moving down to the small intestine, for further digestion, eventual nutrient absorption. Digestion, fermentation in the stomach is a souring process, which is why everyone tends to have a slightly sour smell.