In addition to hunger, mental factors, and diseases, the daily appetites shown are related to taste, vision, olfactory sensation, and secretion of gastric juice. When people enter old age, their functions of hunger, thirst, vision, smell and taste are all reduced as the overall function declines. This reduces old people's sense of food needs, desires, and eating pleasure.
è€å¹´äºº The elderly are not fragrant because of their aging body, and they are not required to solve the problem. Since ancient times, many famous doctors have told people that too sweet, too sour, too salty, and too spicy are harmful to health. Modern medical research also believes that eating more sugar and repeatedly stimulating the pancreas, can increase blood lipids, so that elderly islet cells improve failure of the damage, resulting in diabetes. Polysaccharide diet can also cause obesity, easily lead to cardiovascular disease, cholelithiasis, and increase the burden on the pancreas and kidneys. Too salty is even more harmful to humans. The sodium salt can cause arterial spasm in certain endocrine effects, and at the same time it accelerates the hardening of renal arterioles and increases blood pressure. As far as it is too spicy and sour, it will stimulate and damage the gastrointestinal mucosa and cause chronic inflammation. 
So, how to reasonably solve the problem of eating and odorless in the elderly?
First of all, don’t worry about your ignorance. Because of this long-term development will form a vicious psychological cycle of seeing food. Second, it is necessary to increase appetite through multiple channels. 
(1) To improve the color and flavor of foods, try to mix foods of different colors and tastes into delicious foods with attractive colors when cooking. 
(2) improve the eating environment, pay attention to pre-dining health, not drinking, not smoking, drink less water, in order to reduce the stimulation of the digestive tract and avoid dilute the digestive juice.
(3) Eat regularly and quantitatively, especially if you don't eat snacks, so as not to let the gastrointestinal tract get a moment of peace, disturbing the habit of regular eating, leading to a loss of appetite.
(4) Eat slowly every time you eat a meal. Many foods, especially animal foods, release the amino acids in the meat during the chewing process to increase the sense of taste. While chewing, it also stimulates the production of a large amount of saliva, which can not only lubricate the food, facilitate swallowing, clean the oral cavity, but also decompose the starch into sweet and refreshing maltose, thereby improving the taste and facilitating absorption. Chewing slowly can also protect the gastrointestinal from damage, and can reflexively cause the secretion of gastric glands, pancreas, etc., enhance digestive function, to achieve the purpose of strong appetite. Last but not least, we should not regard beauty as the purpose of eating, but should eat for health.
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