"Wrapping food in plastic wrap can cause cancer when heated"
I believe many friends have heard this statement
Really?
"Wrap food in plastic wrap
Is it true that heating causes cancer"?
Plastic wrap is a plastic packaging product, usually made with ethylene as the masterbatch, through a polymerization reaction. According to the different types of ethylene masterbatch, most of the plastic wrap sold in the mainland market can be divided into three categories:
The first is polyethylene plastic wrap, referred to as PE;
the second is polyvinyl chloride cling film, referred to as PVC;
The third is polyvinylidene chloride cling film, abbreviated as PVDC.
Experts from the Institute of Analysis and Testing of the Beijing Academy of Science and Technology said: because there are a large number of plasticizers in PVC plastic wrap, there are many reports that plasticizers will produce some teratogenic and carcinogenic substances. Like this PVC cling film, if it meets the requirements of national standards, and is purchased in formal channels, the limit and addition of plasticizers in it are required, if it meets the relevant requirements, reasonable and normal use, in fact, it is safe.
PE cling film is mainly used for food packaging, and fruits, vegetables, and semi-finished products purchased in supermarkets can be kept fresh with PE cling film. PVC plastic wrap can be used for food packaging, but because it contains bis(2-ethylhexyl) phthalate (DEHP), which is often referred to as a plasticizer, it has a certain impact on the safety of the human body while increasing the elasticity and toughness of plastics, and should not be used by heating. PVDC plastic wrap is mainly used for the packaging of some cooked food, meat and other products, which can be heated to a limited extent.
PVDC plastic wrap is heat-resistant and non-toxic
and so on better than ordinary plastic wrap
Experts say that it is necessary to use different plastic wraps for different foods. The plastic wrap in the mainland market can be roughly divided into two categories in terms of function:
One is ordinary plastic wrap, which is suitable for refrigerator preservation;
One is microwave wrap, which can be used both in the refrigerator and in the microwave.
PVDC cling film is far superior to ordinary cling film in terms of heat resistance and non-toxicity. Therefore, as long as it is used in accordance with the instructions and meets the relevant requirements, there is no need to worry too much.
Can sun exposure prevent osteoporosis?
In our daily lives, we can also hear the saying that "sun exposure can prevent osteoporosis". Exposure to the sun is the best health care product in the eyes of many doctors, and not liking to bask in the sun is one of the important causes of osteoporosis. Is there a scientific basis for these claims?
In fact, vitamin D is an essential vitamin that the body cannot synthesize on its own and is obtained through sun exposure or food intake. Exposure to the sun can help the body synthesize vitamin D and make up for the deficiency of vitamin D in the diet, but it does not guarantee that it can prevent osteoporosis.
Because osteoporosis is a symptom caused by a variety of factors, calcium supplementation and vitamin D supplementation are possible influencing factors. Recent research data have shown that there is no single contributing factor that can prevent the appearance of osteoporosis.
Can children with short stature get a "height booster shot"?
In recent years, some parents have become anxious about their children's height and hope to promote their children's growth by means of "height enhancement injections". Are HGH injections reliable?
In fact, not all children with short stature need growth hormone supplements. The incidence of short stature in children in mainland China is 3%, and short stature caused by growth hormone deficiency, Turner syndrome, idiopathic short stature, etc., requires ghrelin injection treatment.
Most of the children with slow growth who come to the clinic are not caused by insufficient secretion of growth hormone, but are more likely to be "late growth", that is, medical constitutional delayed puberty. Parents should not use all kinds of "height-increasing" drugs or health care products on the market for their children, otherwise it is likely to promote early gonad development, early closure of bone age, and affect height.
Don't believe these statements
Forward! Let's give a heads-up to my friends
(Please indicate the source of this article and the information of reporters, editors, etc.)
Content source: CCTV news client, People's Daily Science Popularization
Editor: North City
Editor-in-Chief on duty: Che Shui
Producer: Zhao Peng
Source: Beijing Traffic Broadcasting