14 Subtle Clues You're Low on Key Vitamins and Minerals

7. Cracks at the Corners of Your Mouth

Those tiny, sore splits at the corners of your mouth are easy to dismiss as the result of dry weather or a passing habit. Yet recurrent cracks or fissures (called angular cheilitis by professionals) can signal a deficiency in iron or specific B vitamins—especially B2, B3, and B12. They’re common among people with dietary restrictions or those who don’t get enough nutrition from their usual meals. Instead of stocking up on lip balm alone, you might offer your body a helping hand with eggs, beans, nuts, leafy greens, or even a multivitamin under medical advice. If mouth cracks linger or become painful, they’re gently urging further attention—and a healthcare provider can help uncover the root cause.

8. Frequent Mouth Ulcers or Canker Sores

Small, stubborn sores inside the mouth can make eating or talking unexpectedly uncomfortable. If you’re dealing with frequent canker sores, your body might be quietly asking for more folate, vitamin B12, iron, or zinc. These nutrients play a key role in cellular repair and immune support within delicate mouth tissues. While stress and minor injuries are factors too, a deficiency can set the stage for repeated outbreaks. Including lentils, leafy greens, citrus fruits, shellfish, and yogurt may provide gentle, steady support for your oral wellness. If mouth sores are new, unusually frequent, or not healing well, invite a healthcare professional to help shed light on your body’s needs.