If you're gaining weight, low on energy, moody all the time and can't figure out why, your thyroid may be to blame. Symptoms like these can be indicative of an imbalance in your thyroid hormones. Nutritionist Haylie Pomroy came up with this 28-day plan to boost your thyroid naturally by simply changing aspects of your diet. Apply these four tips to your daily diet for the next month for an increase in energy. If your symptoms do not improve, you may want to consider seeing a doctor to have your thyroid checked out.