What is the best birth control method for overweight women?

IUD/implant. Regardless of your age, BP, weight, family history, or reactions to other birth control, the most effective and safest methods of birth control are long-acting progestin-only methods, such as the implant or the hormonal IUD, which decrease rates of endometrial cancer and decrease bleeding. They're safe, reversible, and don't affect weight gain/mood. They're almost as good as getting sterilized.