Taking fewer than 2mg of vitamin B12 supplements each day is unlikely to cause you any harm.
Some scientists have claimed that high levels of B12 can cause outbreaks of acne.
Kubala told medical website Healthline: “For healthy individuals who are not at risk for B12 deficiency, eating a well-rounded, healthy diet should provide all the B12 their body needs.
“While megadoses of up to 2,000 mcg are considered safe in treating B12 deficiency, it’s always best to avoid excessive amounts of any vitamin, especially when it’s not needed.