I thought I was a healthy 50 year old. Relatively fit (walk everywhere!), good weight, have been on a low fat diet for years, never use salt and very little sugar and do not smoke. So was so surprised to find I had hypertension. This book makes total sense to me and have I now adapted to the high fat low carb diet. Within a couple of weeks, blood pressure is now normal and I have been able to cut down on medication! (Also use apple cider vinegar and coconut oil, which is lovely.) This book is definatley a life changer, just wish the "Low fat/low salt" pushers out there would read it!