The signs of nutrient deficiencies can often show up in unexpected wayswhether it's cracked lips, thinning hair, or even joint pain. Understanding which vitamins and minerals your body needs can help address Vitamin B12 deficiency symptoms: Sores and spots on lips could signal lack of B12 Express.co.uk Experts Reveal the Everyday Symptoms that Indicate a Vitamin or Mineral Deficiency 72Point Talking Points 6 strange mouth symptoms that could signal a hidden deficiency The Times of India