James Bond scraped the last dregs of yoghurt out of the bottom of the carton that said ‘Goat-milk culture. From our own Goat Farm at Stanway, Glos. The Heart of the Cotswolds. According to an authentic Bulgarian recipe.’ He took an Energen roll, sliced it carefully — they are apt to crumble — and reached for the black treacle. He masticated each mouthful thoroughly. Saliva contains ptyalin. Thorough mastication creates ptyalin which helps to convert starches into sugar to supply energy for the body. Ptyalin is an enzyme. Other enzymes are pepsin, found in the stomach, and trypsin and erepsin found in the intestine. These and other enzymes are chemical substances that break up the food as it passes through the mouth, the stomach, and the digestive tract and help absorb it directly into the
