WavesnWheels

I'm thinking of trying my hand at making a few hair products for myself and have been reading threads on preservatives. It seems that the general consensus here is that vitamins a, c, and e and grapefruit seed extract are not real preservatives and don't adequately preserve water-based products. I noticed that Aubrey organics, whose products have a one-year shelf life, uses a preservative composed of these exact four ingredients. I've used several of their products and have never had an issue with spoilage. What's your take on Aubrey's preservative?

__________________
2B, normal porosity, elasticity, thickness, texture, moisture loving, protein leery...
Favorites:
CO: Whole Foods Lavender Conditioner
LO: Dessert Essence Coconut, Pure and Basic Clarifying Shampoo
RO: SSDDMT
DT: JCDCT, SSDDMT
Style: AOMM, CCCL, KMFUM, KCTT