I experienced hair loss, as well. I had very thick hair and shedding was very normal for me, but my hair always stayed thick. I started Keto in September 2017 and by December 2017 I was losing far more hair than normal. This continued until around March 2018, probably, and then began to slow down.
All in all, I’d say that I lost about 75% of my hair. I used to use a special hair tie for thick hair and only loop it twice. Now, it wouldn’t even stay in my hair, no matter how many times I loop it. I rarely put my hair in a ponytail after that, but for vacation, I actually used a much smaller tie and looped it three times. The winter was brutal. I had never experienced a cold wind freezing my neck and scalp. Prior to this, my hair was always thick enough that I never needed a hat or scarf for winter, unless it was snowing and blowing at the same time. I live in the Midwest, by the way.
It was around March that I could see some baby hairs here and there and now, I have a ton of two to three inch hairs all over my head. Time will tell whether my hair is ever as thick as it was before, since it will take 18 months for those baby hairs to be to my shoulder again and are able to sweep up into a ponytail. I know this because that is how long it took to grow my gray hair out, down to my shoulders, when I stopped coloring.
I have faith that all will be well in the end and my thick hair will return. On a very pleasant note, I love my gray hair and it is very soft and silky. I was afraid it would be coarse and wiry. This, of course, has nothing to do with Keto. Just the luck of the genes giving me my Nana’s beautiful silver hair!