Signs that you are not eating enough nutrients include fatigue, hair loss, weakened immunity, and changes in skin appearance. You may also experience frequent cravings, irritability, and difficulty concentrating. A lack of key vitamins and minerals can manifest through more severe symptoms, like anemia or bone health issues. Pay attention to your body’s signals and consider tracking your food intake to ensure you are meeting your nutritional needs. Seeking professional advice from a registered dietitian can help identify and remedy any deficiencies.