Preservatives are active ingredients able to prevent the growth bacteria, fungi, & viruses. Peservatives can be synthetic or natural.
Natural preservatives have a generally lower antimicrobial activity and directed to a less broad spectrum of microbes as compared to synthetic preservatives. The preservative effect of most natural agents is primarily based on their antioxidant activity preventing oils and fats to become rancid.
Below are common natural preservatives that can be used in cosmetics in extract or essential oil form. Some are vitamins.
[See Liquid Hand Soap with Tea Tree Oil]
|Grapefruit Seed Extract|
|Neem Seed Essential Oil|
|Thyme Essential Oil|
|Tee Tree Essential Oil|