An inadequate protein intake can have several negative consequences for health. It may lead to muscle wasting, decreased strength, and impaired recovery from injuries and exercise. Insufficient protein can also affect immune function, making individuals more susceptible to illnesses. Chronically low protein levels can cause fatigue, and in severe cases, malnutrition or conditions like kwashiorkor can develop. Overall, protein is crucial for repairing tissues and maintaining overall body function, making adequate consumption vital for health.