Vitamin B12 is used by the body to make red blood cells, according to the NHS. It's also used to produce DNA, and to keep the nervous system healthy, it said. You could have a vitamin B12 deficiency if you're constantly having headaches, lose your appetite, or if you're always feeling tired.
Developing gray hair unexpectedly could be an early warning sign of a vitamin B12 deficiency, according to nutritionist Dr David Jockers. 19659003] Your hair may also appear thinner too, he added.
"B12 deficiency is one of the most common and overlooked conditions in the world, "he said. "B12 deficiencies are a hidden epidemic in our society."
"It is quite possible that at least some of the symptoms we attribute to 'normal' aging ̵
"Symptoms of vitamin B12 deficiency include mental problems – such as brain fog, Alzheimer's and dementia – fatigue, and chronic pain."
"Hair problems – thinning hair and gray hair can be symptoms too."
Greying hair could also be caused by vitamin B6, vitamin D, or vitamin E deficiency
Certain medications, smoking and even stress could also contribute to premature graying. Anyone who has a white hair resulting from a vitamin deficiency should consume more foods loaded with those vitamins. "
But, white hair can appear at any time, at any age.
Other, more common warning signs of a vitamin B12 deficiency include tiredness, feeling dizzy, and irritability
You should talk to a doctor if you are worried about vitamin B12 deficiency symptoms
But you can top up the vitamin by eating certain foods. The best sources of vitamin B12 include beef, liver, dairy foods, eggs, and salmon
A vitamin B12 deficiency can be caused by pernicious anemia – a condition that is caused by the body's immune system attacking healthy stomach cells. Diagnosing the condition early is crucial, as it can lead to heart conditions and temporary infertility on rare occasions