MSA, when I got about 5 months into relaxer stretch, I was having so much breakage at the demarcation line, I couldn't stand it anymore and since I heard so much about gelatin, I decided to add it to my Poos/Cons.
The first thing I noticed is my hair virtually stopped breaking after about 3 wash and conditioning with it. It is also now quite strong, I don't see a lot of broken hairs all over the floor anymore and the texture feels a bit thicker too. I will continue to use it as long as I stretch.
On another note, I found a poo and conditioner that contains gelatin in them and you can find them on
http://www.planetrx.com/search/index.cfm?query=tresemme+vitamin+b12+gelatin site:
www.PlanetRx.com.
I haven't ordered them as yet but I am tempted to. I was in no real hurry because of my own home made gelatin poo and conditioner. I use the gelatin brand by Kroger in the orange and white box. 32 packs are in the box.
ETA: As far as adding it to a moisturizer, I don't know If I'd do that. I would recommend a patch test first and see what happens before emersing my whole head in it.