India has the custom of using coconut oil to care for hair; In recent years, it has also been publicized that coconut oil for external use can achieve good moisturizing effect; And supermodel miranda kerr revealed that the secret of her postpartum slimming is 4 spoonfuls of coconut oil every day. Does coconut oil have such a great beauty slimming effect?
Coconut oil can moisturize for external use.
Most people use coconut oil to moisturize their skin. It should be noted that the less water in the stratum corneum, the drier the skin; If water escapes from the stratum corneum, the drying conditions can be improved. More than 85% of coconut oil is a large number of saturated fatty acid esters. The effect of sealing the skin is similar to vaseline and mineral oil, which can reduce the loss of water through the epidermis and play a role in moisturizing. Coconut oil can also increase the lipid on the skin surface and soften the skin. In other words, coconut oil is a qualified humectant. However, coconut oil contains less substances that really have nutritional effects on the skin, such as unsaturated fatty acids and vitamin E. It is bragging to say that it has skin care effects such as anti-aging and anti-wrinkle.
It may be risky to apply coconut oil, especially unrefined coconut oil, directly to your face or hands. Free lauric acid contained in coconut oil may irritate the skin. The molecular weight of lauric acid is very small, which is easy to dissolve in lipid phase, permeate cell membrane, cause physical damage to cells, inhibit enzymes that produce energy and transport nutrients, cause reversible and irreversible changes, and lead to cell death. Of course, because of this, lauric acid is the saturated fatty acid with the strongest inhibitory effect on gram-positive microorganisms.
Coconut oil is also an important indirect raw material for cosmetics industry, such as soap industry. The saponification value of coconut oil is higher than other common vegetable oils, and its freezing point is 2 1~25℃. The made soap is not too soft, and the foam is also very good, which is very suitable for simple hand-made cold soap. With the increasing popularity of handmade soap, there are also many DIY tutorials on the Internet to follow.
Handmade soap that looks delicious but can't be eaten.
Coconut oil is not reliable for losing weight.
There are rumors on the Internet that supermodel miranda kerr eats 4 spoonfuls of coconut oil every day after giving birth to keep fit. This practice is not good for losing weight.
The main function of saturated fatty acids is to provide energy for human body. Four spoonfuls of coconut oil contains about 500 calories, which is almost equivalent to a McDonald's Big Mac burger, while it is generally recommended that female light manual workers consume 265,438+000 calories a day. If you eat coconut oil, you should eat a lot less other things, or you will get fat if you consume too much energy.
Considering health, it is not recommended to eat more coconut oil. Although coconut oil has some advantages, for example, studies show that the medium-chain fatty acids in coconut oil can reduce fat and cholesterol deposition, improve body fat metabolism and improve insulin resistance, and coconut oil can increase "good cholesterol" (high density lipoprotein cholesterol, HDL) with the function of cleaning and dredging arteries in the body, but this is not the reason to eat more coconut oil. Moreover, coconut oil does not reduce the "bad cholesterol" (low density lipoprotein cholesterol, LDL) that can damage arteries, and what effect it has on the body is still unknown.
A large number of saturated fatty acids in coconut oil will not produce trans fatty acids when cooking, so it is beneficial to use coconut oil instead of hydrogenated vegetable oil for frying and other cooking.
Coconut oil is the strength of hair care.
Hair is divided into three layers from outside to inside, namely cuticle, cortex and medulla, and its main component is keratin.
Hair injury mainly refers to the friction and deformation of hair cuticle under the action of physical (excessive combing) and chemical (dyeing), and the hair care function of coconut oil is reflected in its careful care of cuticle. For all kinds of hair, coconut oil has the function of preventing comb damage. It can form a lubricating film on the hair surface and reduce the friction between hair and skin, even if it has been damaged (such as dyeing and hot water washing).
Coconut oil can be used for pre-shampoo care. Because keratin has strong water absorption, hair will absorb water and swell when shampooing, and then lose water and swell. In these two processes, the fur skin will deform and open, which will increase the friction between hairs and cause hair damage. However, if coconut oil is used before shampooing, a hydrophobic oil film can be formed on the edge of keratin to prevent hair from absorbing water; But also can penetrate into the hair, reducing the swelling degree of keratin. When the hair absorbs less water, the deformation and friction damage of fur and skin will be reduced and the hair will be protected. This is because lauric acid in coconut oil has strong affinity for keratin, and it is a linear molecule with small molecular weight, which can penetrate hair fibers. Mineral oil and other vegetable oils (such as sunflower oil) cannot penetrate into hair.
In a word, coconut oil is a good raw material for skin care and hair care, but we should not expect too much from it. It can't resist aging or remove wrinkles. It is not reliable to lose weight by eating coconut oil.
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