Re: **Pre-poo Through 2014**
Does it make sense to prepoo if you are planning to do a clarifying wash?
Pennefeather
That is a good question. For me personally, I always pre-poo before I allow water to touch my hair regardless of if I am clarifying or not. I do this to try and combat hygral fatigue.
What is "Hygral Fatigue"?
Hygral fatigue is hair damage as a result of the expanding and contracting of hair due to the uptake and loss of water. The constant expansion and contraction can cause damage to the hair fiber which then weakens the hair cuticle and cortex. As a cuticle becomes damaged, it will eventually be exposed leading to porosity and breakage issues. Two things that no one wants.
How to Prevent It
Preventing hygral fatigue is about maintaining your hair's inner protein structure and decreasing the amount of water that penetrates the hair shaft during the washing process. In her book The Science of Black Hair: A Comprehensive Guide to Textured Hair, Audrey Davis-Sivasothy notes that black hair is extremely susceptible to damage and high-porosity problems and polar oils are the best way to combat them, and more specifically hygral fatigue.
Although all oils are non-polar, some have polar regions and can therefore be termed "polar oils"
:sings:: the more you know!). Oils such as coconut oil, almond oil, sunflower seed oil and castor oil are examples of polar oils. What makes polar oils so useful is that they can be rinsed easily from one's hair and can also penetrate the hair shaft allowing a person's hair to be rewetted or remoisturized without subsequent build-up on the hair shaft.