合理膳食、看好食品成分表 几步教你远离反式脂肪酸威胁

Core Viewpoint - Recent reports about trans fatty acids in certain milk tea products have raised widespread consumer concern, prompting discussions on their health risks and sources [1] Group 1: Understanding Trans Fatty Acids - Trans fatty acids (TFA) are unsaturated fatty acids with one or more non-conjugated trans double bonds, primarily derived from two sources: industrial processing and natural sources [3] - Industrial sources include partial hydrogenation of unsaturated fatty acids in vegetable oils, high-temperature processing, and prolonged frying at temperatures above 220°C [3] - Natural sources come from ruminant animals, where bacteria in their stomachs convert polyunsaturated fatty acids from feed into trans fatty acids, which are then stored in their meat and dairy products [3] Group 2: Health Risks and Recommendations - WHO identifies excessive intake of trans fatty acids as a risk factor for cardiovascular diseases, raising total cholesterol and LDL-C levels while lowering HDL-C levels; adults should limit their intake to no more than 1% of total daily energy (approximately 2.2 grams) [5] - In China, the intake level of trans fatty acids in residents' diets is currently low and manageable, with regulations mandating labeling of trans fatty acid content in pre-packaged foods [6] - The trend in the food industry is to eliminate industrial sources of trans fatty acids, with significant reductions achieved in the use of partially hydrogenated oils in products like margarine and refined vegetable oils [6] Group 3: Consumer Guidance - Consumers can avoid excessive intake of trans fatty acids by maintaining a balanced diet, increasing the consumption of vegetables, fruits, dairy, beans, and whole grains, and limiting cooking oil usage to 25-30 grams per day [8] - When purchasing pre-packaged foods, consumers should check ingredient lists and nutrition labels to select products low in trans fatty acids [8] - For freshly made milk tea, consumers should choose vendors with proper licenses and clean environments, and pay attention to the ingredients used [9]