Weight loss involves a number of factors.
First, you need to make sure you are healthy and you need to see your doctor, and to
see if you are OK for exercise.
Have your doctor check all routine labs and your thyroid function.
Then, the best diet, scientifically, is a nutrient dense, anti inflammatory diet.
The diet, in order of preference in quantity, should look like this
whole fruit, beans and peas
Whole grains no yeasted breads, dry cereals or anything refined
Seeds and nuts, but cut out seeds if you have any diverticulosis.
A little tofu or tempeh daily
A little high quality soy or coconut milk yogurt
The soluble fiber in this strategy will stabilized colon function in about 6 to 8 weeks, then about 2 or three helpings of animal foods a week, preferably fish, can be added back.
See the book Eat to Live by Dr. Joel Fuhrman, for instructions on this type of diet.
Finally, you need to exercise a little daily, and walking is fine.
1 to 2 sessions of resistance weight training a week will build fat burning muscle.
If approved by your doctor, do aerobics of some form, such as swimming, classes, etc.
There is no other way to lose weight long term other than the lifestyle change, and it is safe compared to surgery.
No pills are effective for long term weight loss.
OK, so that is an initial answer….
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