It is also the most commonly used hyaluronic acid. The molecular weight ranges from 1 million to 1.7 million.
It can form a breathable film on the skin and make the skin smooth and moist, It can block the invasion of foreign bacteria, dust and ultraviolet rays. The skin is free from infringement.
Simply means that its film forming ability is better, that is, its water retention ability is better, but it is worse if it is absorbed by the skin.