🧠 First, What Does Vitamin B12 Do? Vitamin B12 helps keep your nerves healthy, especially the ones that tell your muscles what to do. If you don’t have enough B12, your nerves can’t send signals properly — and that messes with your muscles. 💪 Muscle-Related Symptoms of B12 Deficiency (In Plain Language): 1. Muscle Weakness You might feel like your muscles are tired or not as strong. Climbing stairs, carrying bags, or even standing up can feel harder than usual. 2. Muscle Cramps or Spasms You may get sudden, painful cramps — especially in your legs. It feels like your muscles are squeezing on their own. 3. Wobbly or Unsteady Walking You might feel off balance or like you're going to trip easily. It’s not just weak legs — your brain isn’t getting the right signals from your muscles. 4. Muscle Aches or Pain Some people feel sore muscles or a deep ache, even without working out. This pain can come from nerves acting up, not just the muscles themselves. 5. Tingling or Numbness That “pins and needles” feeling in your arms, hands, legs, or feet. It can feel like your muscles are asleep or buzzing. 6. Clumsiness Struggling with small tasks like buttoning a shirt, holding things, or writing. It’s because your muscles and fingers aren’t working together like they should. 🎯 Why These Happen: When you’re low on B12: The nerves that talk to your muscles get damaged. Your muscles don’t get clear instructions. This makes you feel weak, shaky, sore, or clumsy — even though the problem starts in the nerves, not the muscles themselves. 🛑 Important: If these symptoms are happening, it’s important to check your Vitamin B12 levels early. Long-term damage to your nerves can be hard to fix if not treated soon.