To prove it works, I am copying and pasting my reply to one of our friends. Hope it helps you more in deciding whether a Keto is for you or not and my previous experience, which I now regret, did not follow through.
I think the Dr said in his presentation, that we are all different and that our carb in take is different. Some can get by on just 20g, but some need 80g. I think because we are so used to carbs, the headaches we experience when we are off them, is because we are addicted to sugar and it is like going cold turkey so to speak.
We did a similar eating plan a few years ago and the headache and cravings were horrendous for the first few days. They also told us that most of us consume the equivalent of between 70-100 teaspoons of sugar a day without realising it, before we starting adding sugar to our food because of the stuff we eat. My only concern is that I will need to cut down on my fruit. But I am willing to give anything a go to get this weight off. I know it is not me, but the hormones doing it. I was never big, before they started messing me around.
When we did the above eating plan, we consumed the equivalent to 12 teaspoons of sugar a day, which equates to 60g of carbs. 5g = 1 teaspoon of sugar. In a three month period, I lost 3.5 stone of fat alone. (They had those special scales that tell you everything) I lost loads of inches and had a lot of compliments but my downfall was the fruit limitations. I regret not continuing with it but willing to give it another go.
Can you imagine how many teaspoons of sugar a ready made meal has in it! I think one meal I checked out, had the equivalent of 35 teaspoons of sugar! Never eaten a ready meal since.
Added link about high fibre and low carb vegetables to help conquer the dreaded constipation we might initially get.
wholelifechallenge.com/10-h...
The link for the presentation for constipation and gut health is
youtube.com/watch?v=xqUO4P9...
Hope this helps, take care