Expert: Xu Chengqing, Nutritionist, Peking University People's Hospital
Soybeans are the food richest in protein among plant-based foods. Soy protein is the best among plant proteins, meaning it contains a relatively complete profile of essential amino acids. It is also extremely low in cholesterol and contains plant sterols that can inhibit cholesterol absorption in the intestines. It is one of the best foods for the elderly with cardiovascular and cerebrovascular diseases and hyperlipidemia, and is a popular supplement for the general public.
However, for the elderly, as the functions of various organs weaken, excessive intake of soy products can lead to the breakdown of incomplete protein into non-protein nitrogen, which must be excreted by the kidneys, thereby increasing the burden on the kidneys. Both the elderly and patients with kidney disease should control and limit their intake of soy products. Consuming about 50 grams of soybeans or soy products daily is considered more appropriate.
To supplement the complete protein found in animal meat, the elderly and patients with kidney disease should ideally consume more chicken, fish, and rabbit meat. These are all high-quality proteins. Since many elderly people are hesitant to eat "red meat," if they do choose to eat it, lamb and beef should be the first choice, followed by lean pork.