Which foods contain vital collagen? Is there a big difference in the effects of internal or external use?
Answer: At present, there are two main methods of supplementing vital collagen at home and abroad: external maintenance (masks, cosmetic preparations) and internal oral use (capsules, drinks). The human body supplements vital collagen mainly through oral administration. Some gelatinous foods, such as beef tendons, pig trotters, chicken wings, chicken skin, fish skin and cartilage, all contain vital collagen.
However, the collagen in these ordinary foods is a macromolecular protein and cannot be directly absorbed by the human body. Therefore, if you want to improve the skin, the effect of this method will not be too obvious, and most of these foods have high fat content. Not suitable for regular consumption.

Collagen products taken internally will be more easily absorbed than those taken externally.
Cosmetics containing water-soluble collagen ingredients can be applied externally to improve the appearance of the skin to a certain extent, improve skin suppleness and moisturizing feeling, this is because this water-soluble collagen has a complete tertiary helical structure, which can capture a large amount of Moisture, so that skin care products play an effective moisturizing effect.
But it should be noted that only the micro-molecular collagen-micro-collagen can effectively penetrate into the dermis layer of the skin (the general collagen molecule is too large to penetrate into the dermis layer from the epidermis, so it can only stay on the surface of the skin, causing temporary smooth effect).