About weight gain and snoring and sleep apnea
Weight loss can cure sleep apnea in some cases, and is always recommended as part of the treatment for sleep apnea and snoring. In some cases, just a 5 lb. weight loss can significantly reduce snoring.
According to the Centers for Disease Control and Prevention (CDC), in the last 20 years we have seen a dramatic increase in obesity in the United States: "More than one-third of U.S. adults (34.9%) and approximately 17% (or 12.7 million) of children and adolescents aged 2–19 years have obesity." 
Weight loss can significantly improve your sleep apnea. In fact, a recent 5 year study showed that even moderate weight reduction can prevent the progression of obstructive sleep apnea.
Diet, Acid Reflux and Sleep
Controlling acid reflux and "silent acid reflux" helps with snoring, sleep apnea, and improves the quality of your sleep.
Dropping Acid: The Reflux Diet Cookbook & Cure by Dr Stern and colleagues is the first book to offer a nontraditional diet to help cure reflux, as well as list the best and the worst foods for a reflux sufferer.
Using their extensive research, Drs. Stern & Koufman define this shockingly common disease and explain why a change in diet can alleviate some of the most common symptoms.
The recipes use tasty fats as flavorings, not just as main ingredients and include a variety of dishes that prove living with reflux doesn’t mean living without delicious food.