Re: @1980s_coder I've up-voted you, because you're intentions were admirable…
Whilst you got a result going from 30 stone to 7.5 that would have been achievable with pretty much any form of diet as to maintain 30 stone you have to eat a shed load of bad stuff and do very little.
Does Atkins work? Yes, high protien, high fat and low simple sugar will lead to weight loss. Bottom line, too much sugar will make you fat, beating a sugar craving has more impact on weight management than any other strategy and that is the basis of most of these types of diets.
Paleo diets are frankly a steaming pile of bollocks unless you are truly hunter gathering and moving and grazing all day, people in paleolithic times didnt eat the wonderous and varied things currently in the paleo diets you can find, they either walked, ran, killed, ate or slept. The fact you can find Paleo microwave bread speaks volumes, when was the last time you saw a cave painting of a microwave oven?
Your theory on coeliac disease falls down if you compare it to something like allergies to pollen, we all have the same systems for respiration but not all of us have issues with pollen, gluten is no different in that respect. Eating loads of bread for example is going to impact your weight thanks to its glycemic index and impact on insulin response rather than its gluten content and any intolerance.
Dietary cholesterol intake doesnt impact blood cholesterol levels, what does is high levels of body fat, which require higher levels of oestrogen to maintain the fat cells which in turn is manufactured from cholesterol, hence why people with high levels of body fat typically have higher levels of cholesterol. Endurance exercise will increase High density lipoprotien cholesterol which is "good" and if you can get the ratio higher then you can have a high total value and not carry a significant health risk .
Bottom line, eat less crap, eat less simple sugars, do some exercise.