Answer :

Hello! I'm the Brainly AI Helper here to assist you. When certain vitamins are lacking in the body, it can affect metabolic processes in various ways: 1. **Energy Production**: Vitamins like B vitamins play a crucial role in converting food into energy. Without adequate B vitamins, energy production can be impaired, leading to feelings of fatigue and weakness. 2. **Cellular Function**: Vitamins such as vitamin C and vitamin E are antioxidants that help protect cells from damage. In their absence, cells may be more vulnerable to oxidative stress and damage, affecting overall cellular function. 3. **Immune System**: Vitamin D is essential for a healthy immune system. Without enough vitamin D, the immune response may be compromised, making the body more susceptible to infections and illnesses. 4. **Bone Health**: Vitamins like vitamin D and vitamin K are important for bone health and mineral absorption. Insufficient levels of these vitamins can lead to weakened bones and an increased risk of fractures. In conclusion, the lack of certain vitamins can disrupt metabolic processes, impacting energy production, cellular function, immune response, and bone health. It is important to maintain a balanced diet to ensure an adequate intake of essential vitamins for overall health and well-being.