The use of plant extracts in cosmetics is to make cosmetics have a certain effect. At present, there are about 500 kinds of plants used in cosmetics at home and abroad, and their roles in cosmetics can be roughly divided into the following categories:
Antibacterial and antipruritic
Such plant extracts have biological activity against pathogenic dermatophytes and bacteria. Common tea Extracts, Honeysuckle Extracts, Aloe vera Extracts, licorice extracts, Chuanxiong extracts, mint leaf extracts, sage extracts, etc.
Moisturizing
These plant extracts moisturise and soften skin keratinocytes, helping to keep the skin hydrated and supple. Common seaweed extracts, lemon extracts, oat extracts, aloe vera extracts, motherwort extracts, Gynostemma pentaphyllum extracts and so on.
Allergy whitening
These plant extracts can protect the skin and mucous membranes, whiten the skin, as well as antiseptic and prevent suppuration. Commonly include pueraria root extract, witch hazel extract, horsetail extract, bergamot extract, peony extract, peony extract, etc.
Conditioning and nourishing
The extracts of these plants have the functions of protecting the skin, promoting blood circulation, conditioning and nourishing the skin, and promoting skin function. Common tea extracts, camellia extracts, aloe vera extracts, sage extracts, horse chestnut extracts, lavender extracts, ginseng extracts, Gynostemma pentaphyllum extracts, golden flower extracts, rosemary extracts, etc. .
Whitening
These plant extracts can inhibit the activity of tyrosinase, remove melanin, and play a role in whitening and freckle. Common active papain, Angelica extract, Platycodon grandiflorum extract, lemon extract, etc.
Sun protection
This type of plant extract is a natural UV absorber, and its maximum absorption wavelength for UV is around 280 nm, so it can prevent UV damage to the skin, and is generally used with physical sunscreens. Commonly include Angelica extract, Sophora japonica extract, Coix extract, Comfrey extract, Aloe vera extract, Matricaria extract and so on.
Moisturizing protection
Mainly vegetable oils, with anti-cracking effect, can protect the skin, prevent dryness and chapped. Common are shea butter, rice bran oil, jojoba oil, olive oil, safflower oil, coconut oil, tea seed oil, cypress oil, etc.
Antioxidant and anticorrosion
Cosmetics will deteriorate during storage due to the action of microorganisms or the rancidity of the oil components they contain. Plant extracts that can be used as preservatives and antioxidants in cosmetics can be divided into: sterol preservatives and antioxidants, such as Scutellaria baicalensis, Treats, Achyranthes, Hedyotis diffusa and other extracts; quinone preservatives With antioxidants, such as Polygonum cuspidatum, rhubarb, Cassia and other extracts; phenolic, acid preservatives and antioxidants, such as white peony, anthocyanins, peony, Xu Changqing, Forsythia and other extracts.
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