Sorry I didn't see this... I used the seeds before and the pasty gel made my hair stronger. I think it seemed like it was thicker because it didn't feel as fragile and it felt more "substantial". I don't really think anything can make the hair that's already out of your scalp thicker but I think that with continued use your new growth will be thicker because the fenugreek will make it stronger and protect it from damage so it won't be so damaged.
You can mix the gel with conditioners and other things also. I used the gel directly and had seeds stuck in my hair that I had to conditioner wash out but I still liked i
Hope that helps.