The fast-paced lifestyle and challenging work make people particularly sensitive to the position of their hairline. Once a trend of upward movement of the hairline is detected, tension and anxiety about hair loss begin to arise. So, various hair loss prevention shampoos, scalp nutrition solutions, Wuhei health pills, and other diverse actions to protect the hairline emerged one after another. Just Relax! This does not mean hair loss, the upward movement of the hairline is likely a "declaration" of its maturity. The latest issue of the "Science" Rumor List has been released, which packages the hottest health rumors recently for "centralized destruction". The monthly "science" rumor list is jointly released by the Beijing Association of Science and Technology, the Beijing Municipal Committee Cyberspace Office and the Capital Internet Association, and the Beijing Association of Science and Technology Journalists and Editors, and the Beijing regional website platform. The rumor is that skim milk is healthier than whole milk. The natural fat content in milk is generally around 3.5%, and different manufacturers will "standardize" it to a relatively constant value. If the fat content is at the level of 3.25%, 3.6%, etc., it is called "whole milk". The value for 'low-fat milk' has decreased to 1%, while 'skim milk' needs to be below 0.2%. After removing some or almost all of the fat, the protein, calcium, and lactose content of these milks will not change significantly, but fatty acids (such as omega-3, conjugated linoleic acid, etc.), fat soluble vitamins (such as vitamin A), and cholesterol will be removed along with the fat. Milk containing fat is more fragrant and flavorful, so for most people, whole milk is better to drink. After removing all or part of the fat, the calorie content of milk will significantly decrease, which is considered a way to help with weight loss. However, there are many research data that do not seem to support this hypothesis. Moreover, whole milk provides not only fat but also high-quality protein and calcium. Instead of controlling milk fat, it is better to reduce cooking oil. In addition, whole milk can provide a better sense of satiety, and the aroma and rich taste brought by milk fat are unmatched by skim milk. Therefore, for people with high blood lipids, skim or low-fat milk may be a better choice, while for others, they can choose according to their preferences. Rumor has it that an upward shift in the hairline is the truth about hair loss. Many people believe that an upward shift in the hairline indicates the beginning of the hair loss process. In fact, the upward movement of the hairline does not necessarily mean hair loss. It may be due to the maturity of the hairline, which is a normal physiological change and does not necessarily mean baldness or true hair loss. The maturation of hairline is related to the normal hormonal action inside the body, mainly occurring in early adulthood. Chinese scholars have studied that since the age of 30, part of the hairline of countrymen's forehead will begin to retreat, that is, the hairline will move upward. This upward movement is usually limited. Data shows that compared to childhood, the hairline can be moved up by about 2 centimeters without any other manifestations such as thinning, thinning, or softening of hair. In short, not all hairline movements are hair loss, it may just be "hairline maturation", so don't blindly worry. The rumor is that drinking weak alkaline water can change the body's pH level. The truth is that drinking weak alkaline water cannot directly change the body's pH level. According to the chemical properties of residual ash after combustion, food is classified into acidic and alkaline foods. Sour foods are rich in elements such as phosphorus, sulfur, and chlorine in their ash content, while alkaline foods are rich in elements such as potassium, sodium, calcium, and magnesium. This classification mainly reflects the chemical composition of food, rather than its direct impact on human acidity and alkalinity. Food undergoes digestion, absorption, and metabolism in the human body, producing acid-base metabolites. However, the human body has a powerful mechanism for regulating acid-base balance, which can automatically maintain stable blood acidity. Acid base balance is the result of the combined action of various metabolic products in the body, and cannot be altered by a single food. The Chinese Dietary Guidelines for Residents advocate for a diverse and balanced diet, without excessive attention to the "acidic" or "alkaline" properties of food, as they do not directly affect the body's acid-base balance. Similarly, drinking weakly alkaline water does not directly regulate the pH of the human body. The rumor that people with egg allergies cannot receive the flu vaccine is due to some people believing that the flu vaccine is often made from eggs and contains residual egg ingredients, so people with egg allergies cannot receive the flu vaccine. However, the Pharmacopoeia of the People's Republic of China (2015 and 2020 editions) does not include egg allergy as a contraindication for vaccination. Meanwhile, studies by foreign scholars on egg allergy patients receiving inactivated or attenuated live vaccines have shown that no severe allergic reactions have occurred. In addition, the commonly used influenza vaccines in China have extremely low levels of ovalbumin, so if you are allergic to eggs, you can receive the influenza vaccine. The rumor that drinking soda water can lower uric acid levels is true. Many people believe that soda water is alkaline and drinking soda water can lower uric acid levels in the body. However, drinking soda water has limited uric acid lowering effects. The effective substance for reducing uric acid in soda water is carbonic acid or sodium bicarbonate. Sodium bicarbonate is an "adjuvant" medication for treating gout, which alkalizes urine, reduces urate deposition or crystallization, and promotes uric acid excretion. Drinking soda water can have a similar effect. However, whether drinking soda water or taking sodium bicarbonate orally, it needs to pass through the digestive tract. Normally, the pH value of gastric juice is around 1.5. After neutralization by gastric juice, the effect of reducing blood uric acid with soda water or sodium bicarbonate is very limited. It should be noted that long-term and excessive use of sodium bicarbonate can cause alkalosis. Moreover, when patients with concomitant hypertension or heart failure take sodium bicarbonate, the intake of sodium salt increases, which may exacerbate the occurrence of hypertension, edema, and heart failure. On the other hand, long-term high uric acid levels can cause urate stones in the urinary system, but high urine pH can also easily form alkaline stones containing calcium. In addition, long-term consumption of soda water can alter the acid-base environment of the gastrointestinal tract, which can easily cause discomfort such as bloating and decreased appetite. For gout patients, regular medical attention should be sought to monitor urine acidity and alkalinity, and the doctor should decide on the timing and dosage of sodium bicarbonate use. Reducing purine intake and drinking more water to promote uric acid excretion are important measures to reduce complications. Rumors suggest that calming and brain boosting products can alleviate pre exam anxiety. The truth is that it is inevitable for candidates to experience tension and anxiety during preparation. In this case, some people may choose health foods that have calming, brain boosting, and memory enhancing effects, hoping that they can alleviate anxiety and calm emotions. However, health food is essentially a type of food, not a therapeutic drug. The "effect" felt by candidates after taking health foods such as "calming the mind and tonifying the brain during the preparation period" and "enhancing candidates' memory" is likely only a "placebo" effect in psychology. Pre exam anxiety is a common problem during the preparation process, but the vast majority of candidates experience mild anxiety and do not require medical attention. During the preparation period, candidates should learn to scientifically regulate their own mentality, pay attention to maintaining a normal living state, follow a regular schedule, have a reasonable diet, and exercise appropriately in order to maintain mental balance. In addition, candidates can also try some relaxing activities, such as practicing yoga, playing ball, running, etc. This not only helps to relieve anxiety, but also improves physical fitness, providing better physical conditions for exam preparation. (New Society)