In the past, I would deep condition overnight in a minute … shoot, in a millisecond. But, over the course of 2011-2012, I learned about the importance of protein, protein/moisture balance and that I could, in fact, over-condition my hair. I realized that the very soft feeling that my hair had for most of 2011 was because my hair was over-conditioned and that the crazy shedding that I was experiencing in fall 2011 was likely my hair breaking, because it didn’t have enough tensile strength.
However, though I began to incorporate protein into my regimen and felt a great improvement in the strength of my hair and saw my curl pattern return, I still slept in deep conditioners often. Now, the thing is, I didn’t do this to get any additional benefits, rather, I would sleep in my conditioner out of sheer laziness. Sometimes, I’m tired and I just don’t feel like washing it out.
But then, this fall, I read a very interesting and informative article:
Deep Conditioning: Effect of Time and Temperature/Heat
Increasing the time you leave conditioner on hair allows more of it to adsorb with a maximum adsorption at 20- 30 minutes.
[W]hen conditioner is heated to 35°C, at 10 minutes there is slightly more than 5% on hair and at 30 minutes there is slightly more than 10%. Therefore temperature increases adsorption. The rule however remains the same in terms of no further conditioner sticking to the surface after 30 minutes.
So How Long Should I Deep Condition?
Well, after reading that
1) Conditioning over 30 minutes does not provide any additional benefits as adsorbtion plateaus
2) Conditioning for hours at a time causes a a change in the keratin that results in softening and weakening.
I started re-thinking my post-wash, deep conditioning habits. Now, though I have pretty much stopped deep conditioning overnight and often only deep condition for 30 minutes to an hour, I still condition for 3-4 hours on occasion. But again, it’s not to get any additional benefits … it’s just because I don’t feel like getting up to rinse my hair and style it!! I KNOW!! LOL!! But, I’m really working on keeping deep conditioning down to 30 minutes or a max of an hour!!
Now, although I don’t do post-wash deep conditioning overnight anymore, I still sleep in my pre-poo (Vatika Oil mixed with Aubrey GPB and/or Aubrey Honeysuckle Rose). The reason I do this is because the study done on the benefits of Coconut Oil for pre-pooing demonstrated the effects with overnight application, so that is what is recommended. I also pre-poo my dry, not wet or dampened, hair. However, the Aubrey conditioners do contain water as the first ingredient … so I’ve been torn about mixing them with Vatika Oil for my overnight pre-poo. However, for now, I’ll continue this practice as my hair seems to do great with the combo and doesn’t feel excessively soft. I think the protein in GPB and the “protein-retaining” properties of coconut oil may have something to do with that! And, you know the saying, if it ain’t broke …
This article was originally published on December 2013 and has recently been updated for grammar and clarity.