Lack of essential nutrients can cause redness of hair , beard and short mustache. Therefore, hair , beard and short mustache should not be red , not easily ripened and always lively. Therefore , regular use of black cumin oil or mustard oil on hair , beard and short mustache. For those whose hair , beard or short mustache has turned red or is starting to turn red , if they regularly use black cumin oil or mustard oil in them , then at some point they will turn black , vibrant or fresh color. The amount of nutrients in black cumin oil or mustard oil is very important for the freshness of hair , beard and short mustache. Regular use of these oils protects hair , beard and mustache from aging easily. Thanks.