A benefit of low carb dieting is that it can clear up your allergies. Allergists offices are full of 4 year olds, 14 year olds and 50-60 years olds. Later in life you can develop a whole new crop of allergies. The most common allergic symptom is nasal congestion that keeps you awake at night. The most common cause of this nasal congestion is allergy to eggs, dairy, nuts, wheat, soy and shellfish. If you eat just one protein food a day, along with low carbohydrate vegetables, you can likely figure out what food or foods are causing your nasal congestion You don’t have to take drugs (decongestants) to make it through the night. Just stop eating the food(s) you are allergic to.