I can talk for hours about diets...lol
I tried dieting quite a few times as I sometimes get obcessed about a pound or two and being psychologically obcessed with things doesn't help.
I tried all sorts of diets from atkins, to complex carbs only, to detox, to the "nothing diet".
I've tried the Atkins diet for a few days, I cheated though on the 5th day lol and ate a big tub of vanilla ice cream hahahaha...and guess what I put on more weight than I ever did...I run to the gym that same day and spent hours, I was haunted by feelings of guilt lol. I only got it off with exercise. Surely a tab of icecream wouldn't have been that much of a probleme outside Atkin's.
Solution is never starve yourself: healthy diet (all necessary components) +
exercise
It's a simple rule just like in thermodynamics:
Energy in = Energy out
So exercise more than what you consume and you'll lose weight, as simple as that.
Really, those diets aren't good for you and even if they help you lose weight in the short term, the weight is back once your metabolism is back to normal.
For example I give you this formula: 3500 calories = 1 pound.
Keeping this in mind set a target for yourself and do it gradually. Any sudden change in weight isn't going to do you any good.
We have a biological clock in our brain, a thermostat that regulate body temp we all know that. We also have a weight thermostat that regulates and stabilises our weight.
How it works is if you lose weight in a few days and you're happy with your weight and start eating normally again your Wt thermostat is going to switch the weight to its equilibrium state, i'e' previous weight, unless you keep on dieting even after reaching your target. Again that's not a good idea.
Starving isn't good either as it lowers the metabolic rate and eating normally again would be interpreted as over-eating!!! Result= weight gain.
When you lose weight initially it's carbs then protein being burnt to produce the extra energu required and not provided by food. IN the body, each molecule of carb or protein is associated with 4 of water therefore initial weight loss is mainly water.
You lose weight than you start having a balanced meal basically carbs and protein and you put on weight. Why? because water is restored in the body to complex with the carbs and protein!
Not good either.
The Atkins diet is very risky in the long term. I know someone who lost 2 stones in just over 2 weeks on this diet but guess what, all back when back to carbs.
Celebrities out there like Jerry Hariwell just prove this point. Plus eating fatty food eeekkk surely isn't healthy.
From my experience, I find that if I want to lose weight, I eat as much as I want but limit my meals to a soup, vegetables and fish or chicken breast. That works wonders

If exercise isn't a routine.
Exercise prevents all weight problems so that's the keypoint.
Oh and those weight loss tablets and drinks..they are crap.