Just like smoothing a crumpled paper, hyaluronic acid makes the paper absorb water and flatten it, while botulinum toxin makes the paper flatten. Simply put, hyaluronic acid is responsible for getting the skin, and botulinum toxin is responsible for getting the muscle;

Due to different types of action, the molecular size of hyaluronic acid is also different. Generally, macromolecules can be used for shaping, while small molecules are more suitable for wrinkle removal and moisturizing, mainly because of the water absorption and high safety of hyaluronic acid. Botulinum toxin, also known as botulinum toxin, is used in the field of medical beauty and plastic surgery for stovepipe, face-lifting, wrinkle removal and body odor removal, mainly because botulinum toxin can act on nerves and muscles;

The applicable symptoms are different. Hyaluronic acid is suitable for enriching temples, rhinoplasty, augmentation of cheeks, removal of decree lines, augmentation of lips, filling lacrimal ditches and augmentation of earlobes. The reason why these wrinkles and depressions can be improved is because the main function of hyaluronic acid is filling, which can improve static wrinkles (that is, wrinkles that still exist without expression wrinkles). Botulinum toxin injection can thin face, correct drooping eyebrows, correct drooping corners of the mouth, remove puppet lines to lift head lines and remove eyebrow lines. Botulinum toxin has this effect because the main way of botulinum toxin is to block the impulses of muscles and nerves and improve the dynamic wrinkles caused by expressions.

At the injection level, hyaluronic acid is usually injected into dermis, including superficial dermis, middle dermis and deep dermis. This is because hyaluronic acid is mainly used to improve wrinkles caused by dry skin and loss of ingredients, so it can only be injected into the superficial dermis. Botulinum toxin (including face-lifting needle, leg-lifting needle and shoulder-lifting needle) is injected into muscle layer, including superficial muscle, middle muscle and deep muscle. Botulinum toxin should be injected in these positions because it mainly acts on muscles, so it is best to inject it in the muscle layer if you want to play an effective role.

Hyaluronic acid: Hyaluronic acid for injection adopts a special "cross-linking" process to form a stable polymer structure with free hyaluronic acid particles, which has strong supporting force and shaping ability and has a remarkable effect on filling static wrinkles. Also known as "the clay of God". After injection, the skin will be full and smooth, achieving the effect of smoothing wrinkles.

Botulinum toxin: The wrinkle removal principle of botulinum toxin is "softening", which can block the signal transmission of nerve to muscle movement, paralyze muscles, soften muscles that contract to produce wrinkles, and remove dynamic wrinkles.

References:

Baidu encyclopedia botulinum toxin