White beard is caused due to the lack of melanin pigmentation. This is caused due to bad nutrition, stress, excessive smoking & alcohol consumption, overthinking & hereditary issues. There are certain things that you can do to overcome white beard.
Next Steps
De-Stress. ...
Don't smoke. ...
Eat walnuts and other sources of copper. ...
Eat carrots and spinach, iodine
aids the production of melanin.
Health Tips
Drink lots of water, dehydration stops the transport of melanin to the follicles, your facial hair is the first to suffer