In many cases, particularly in more serious cases, vitamin B12 is treated with injections or tables to replace the missing vitamins.

The NHS explains: “Vitamin B12 supplements are usually given by injection at first. Then, depending on whether your B12 deficiency is related to your diet, you’ll either require B12 tablets between meals or regular injections.

“These treatments may be needed for the rest of your life.”

Another symptom of vitamin B12 deficiency to note is bad breath, according to Dr Craig Maxwell from the Integrative Medical Center in the US.

Original article: https://www.express.co.uk/life-style/health/1094789/vitamin-b12-deficiency-foods-marmite-yeast-extract-shiitake-mushrooms-fortified-cereal