How can i lose 70lb?

Dietary control: The simple answer is to ingest fewer calories than you burn up. This will happen for sure if you do that. You can be assisted by a proper diet, and the help of a nutritionist and exercise therapist.

Nutrient dense foods: Eat foods that are nutrient dense (like meat, fish, poultry, eggs, cheese, low starch vegatables and water) avoid foods that are not nutrient dense (like starches and sugars, including fruit) nutrient dense foods will increase your basal metabolic rate. On the other hand, starches and sugars impair thyroid metabolism via affects on your liver (which helps activate thyroid hormone).