I have a friend that does isagenix. I am also not a fan of MLM.
I also don't like how supplement heavy it is rather than just having real food. Some of the stuff they push like the "cleanses" and fat burners, pre-packaged shakes, bars, vitamins bla bla bla........
You want to kick start your health? Cut your intake to approximately your base metabolic rate, drink LOADS of water, get lots of protein for recovery for the beating you give your muscles, and drink real, whole foods. I like chicken breasts, milk, lots and lots of vegetables.
Protein shakes I will throw a scoop of protein whey into a blender with frozen strawberries
( cheaper in large bags than fresh, and makes a better smoothie
) banana, milk.
Increase intake as needed depending on how hard you're working out, but when I'm in off season fat loss mode, I tend to take in my BMR and at MAX 50% of the calories I burn through exercise.
I lost 50 pounds in 7 months and could have done better.
Heavily processed overpriced pre-packaged nutrition isn't going to do the job any better, nor will it make you rich. It WILL however send the message that you're willing to spend the money on the product and will make it harder to stop using it once the pressure is on.
Save your cash, eat whole, real simple foods, eat for what your food has in it, not for what it doesn't have
( drink a milk because of the nutrients, not a diet coke for the lack of sugar
) and control intake. THAT is how you will kick start your nutrition, not be buying into a mlm scheme that also does nutrition.
( Successful MLM people are VERY dedicated, so the success stories you see with it I am VERY confident could be achieved with normal nutrition as well
)