One of the 5 Rules for Maintaining a Permanent Healthy Weight at all ages is WATER. Drink pure - clean - water. I recommend 80 oz. per day. If it sounds like too much set goals and build up. 10 oz. before noon, 10 oz. before 3pm, 10 oz. before 6pm and 10 more before 9pm. Set your phone alarm as a reminder if you need to.
Here is a fun link Find A Local Water Spring
Explore some really fresh water in your area.