A surprising number of young adults are experiencing strange symptoms that hide a bigger problem — low calcium and vitamin D levels! Dr Saurabh Sethi, a Harvard-trained gastroenterologist who also studied at AIIMS and Stanford, reveals the hidden early signs. In a lively Instagram video, he shares that the first alarm sounds in your fingertips — a subtle tingling or numbness many people miss. Why does this happen? When calcium is low, nerves get jumpy and cause tiny muscle twitches or persistent tingling. "This is your body’s alarm bell," Dr Sethi warns, "but most ignore it until things get worse." To fight this silent trouble, Dr Sethi recommends packing your diet with calcium-rich plant foods like fortified plant milk, tofu, sesame seeds, and leafy greens — especially if you avoid dairy. But here’s the catch: none of this calcium helps unless your body has enough vitamin D. "Without vitamin D, calcium just passes through," he says. Joining the vitamin D conversation, Dr Anshuman Kaushal, a surgeon from Apollo Hospital, calls vitamin D an "internal solar panel" for your body. He warns that almost half of us block vitamin D by staying indoors too much, covering up, or using strong sunscreens. Low vitamin D hurts bone strength, immunity, and nerve function. He advises sensible testing before taking supplements and notes the Endocrine Society’s 2024 recommendation: adults need 1,000 to 2,000 IU daily, with more if severely deficient. Both experts agree that easy fixes like popping pills aren’t enough. The real power lies in simple lifestyle moves: getting 10 to 15 minutes of morning sunlight with arms and legs bare, eating eggs, fish, and fortified milk, and watching out for early warning signs like tingling, muscle twitches, or tiredness. The modern lifestyle quietly steals our vitamin D and calcium. But bones don’t break first — the warning starts in your nerves. As Dr Sethi puts it, those tiny finger tingles could be telling a big story. Spot the signs early and save your bones and nerves from bigger trouble!