I only use protein once a month, but this is the post I resd on LCHF on the isuse:
I've noticed on some of the threads, there seems to be some confusion and misconceptions about protein in hair products. I've noticed that some think that the use of (overuse) of) any protein is bad for the hair.
But the only protein that we really want to avoid over doing it with is Keratin. Also, sometimes "Hydrolyzed Animal Protein" appears in the ingredient list & this is one that we also do not want to overuse. Keratin is the protein naturally found in hair so when we use a hair product with Keratin, it adds structure & strength to our hair. It does this by hardening (strengthening) the hair to a degree. This is why we moisturize after strong protein treatments It is said that overuse of a protein conditioner can cause the hair to become dry and brittle. If it is Keratin, this is true--BUT...
There are even protein conditioners with Keratin in them that are safe for weekly use-IF YOU FOLLOW THE DIRECTIONS (K-Pak & Keraphix are 2 that come to mind) Humectress has Keratin and is safe for use DAILY. The old formula of Mizani Moisturefuse had keratin protein in it & I used it faithfully(weekly) in college & my hair thrived thrived thrived!!!!!!!! ( and I was still using quite a bit of heat during this time)
The other proteins we encounter in hair products besides keratin are not naturally found in the hair but are beneficial to the hair. I won't go into detail (we have a thread about all of it) but these proteins are moisturizing, shining, smoothing, elastic, etc. proteins. Proteins from "starchy" sources also offer mild structuring (examples: wheat & rice protein)
The strong protein conditioners (that I can think of) that would be detrimental with overuse would be INTENSE treatments such as DRC 28, Aphogee, & Emergencee.
"Over the counter" products for everyday use that contain protein are not dangerous to your hair. If they were--they would not be sold over the counter OR the directions would explicitly tell you to only use the products every so many days. (examples: Profectiv break-free& healthy ends, ORS Carrot Cream)
So in conclusion, don't fret about protein. Don't be paranoid that every little protein is bad. Don't be like "ooo, protein!" and shake like they did on Lion King to "ooo Mufasa--say it again! Mufasa!" In fact--if you are relaxed, you betta get some protein up in that mane of yours. If you want your ends to stay thick and healthy for longer periods of time--protein is key to your hair's diet. If you use any drip-drop of heat EVA(ever) in your hair, get some protein.