You don’t have to go grey? Expert reveals the secret to hanging on to your natural colour – with no dye needed

[One suggested factor is vitamin B12 – the one supplement all vegans should be taking. It is sourced in soil. Animals acquire it by munching on the soil. They are just the “middle man”, so to speak.]

https://www.dailymail.co.uk/health/article-13232869/You-dont-grey-leading-expert-reveals-secret-hanging-natural-colour-no-dye-needed.html