4:1 is a reference to the strength: 4 parts of botanical to 1 part native extract.
Grapefruit seed extract (GSE) is derived from the seeds, pulp, and white membranes of a grapefruit. The main biological compounds in a grapefruit seed that are believed to be responsible for its ability to destroy infectious invaders are the polyphenols known as limonoids and naringenin. These components of GSE are known for their powerful antimicrobial and antivirus properties. GSE is a great addition to face masks to help combat acne and blemishes. It's also a great ingredient for soaps, toothpaste, and other personal care items.
