About 50% of the watermelon seed is oil, thus making it high in calories and fat. One cup of dried watermelon seeds have 602 calories and 79% of the daily recommended value of total fat. 53% of the fat is saturated. The other percentage consists of monounsaturated fats and polyunsaturated fats, including omega-6 fatty acids. These unsaturated fats benefit one's health by reducing cholesterol levels and decreasing high blood pressure. Watermelon seeds are an excellent source of protein, containing every essential amino acid. Eating one cup of watermelon seeds will provide 61% of the daily recommended value of protein. Eating watermelon seeds can regulate blood sugar levels, increase energy, maintain the nervous system and digestive system, and promote healthy skin.