First things first, take her to the doctor to check for possible thyroid problems or other issues that may have led to her weight gain since May. I only mention thyroid as one possible issue. I’m not a doctor and cannot say what else might be happening.
Once she is cleared for health problems, this is the time for both of you to work together. You can be each others’ best cheerleaders and helpers if you remember one thing: don’t nag. It doesn’t work.
Now is the time to start throwing out any junk food in the house. And I mean throw it out. People need food to survive, but they don’t need corn chips. So if there are others in the house who may complain that there are no snacks need to do one of two things:
1.) Understand that in your house, fruit, low-fat cheese & yogurt, nuts and vegetables are now the available snacks.
2.) They can go to the convenience store and buy a single size snack to eat. And it needs to not go in the common food area.
The goal here is not to deny others in your house, but to help to remove some of the temptations for you and your daughter.
If the two of you don’t cook together, now is the time to start. Baking or poaching boneless, skinless chicken breasts or some salmon is quite easy. Get some whole grain pasta and make marinara together. Steam some brown rice and serve it with a chicken and veggie stir-fry. Or just a veggie stir-fry for that matter! Can’t live without sausage? You can get turkey or chicken sausage that is lower in fat. But read the label! In fact, start reading all of the labels on the foods that you buy. These are just some suggestions. I really believe that people know what foods are good for them, they just make choices that aren’t right for them because it seems easier to grab a greasy fast food meal than to cook something. And if time is an issue, look into cooking with a crock-pot. Or cook a lot on the weekend and freeze your meals.
Teach yourselves about portion size. Do you know what is considered a “portion” of various foods? Maybe that’s a project for your daughter – find out what a “serving” really is. There are many online resources, as well as books in the library that should help.
Water is important – make it your primary beverage. Ditch the soda, including diet.
The other thing that will help you both is to track your food. I find tracking online is easiest for me. There are several websites where you can do this.
Also, start moving. Whether you go for walks, do a workout DVD, whatever, you need to move. This one you don’t have to do together. She might be embarrassed to do this with you. I would have been when I was 12.
And mom, if you’re an emotional eater, I suggest that you look into buying “The Food and Feelings Workbook,” by Karen Koenig. It’s about $13 on amazon.