Grapefruit extract does not kill good bacteria, it kills fungus and fungal infections. Grapefruit seed extract kills systemic yeast as well.

Hmm. I'm not positive, but I would assume that one is the extract of a grape seed and the other is the extract of a grapefruit seed.

Grapefruit seed extract can be taken as a strong solution of 15 drops in 1 oz of water.

Grapefruit seed extract have numerous health benefits. They are known as a powerful natural antiseptic, antiviral and anti-fungal agent and possible anti-cancer properties.

Grapefruit seed extract is used to kill fungal infections. It is often a large part of anti candida diets. You can also use it as part of a program to remove parasites.