If the publication is to be black and white it is much better to shoot in black white for your submission. Avoid the temptation of using your colour portraits for black and white press releases and business advertising. Part of your research is to find the right photography team to work with. Getting good results is a team effort that involves you, the photographer, a makeup artist, and for full body pictures, a stylist. Sometimes your makeup artist will also be a hairdresser, but this should be clarified in advance.
Stylists take care of clothes on a photoshoot.
For simple headshots they are not needed, but anytime the photograph shows more than head and shoulders a stylist is helpful. Women should be aware that makeup application for black and white and for colour photography is very different. This is where working with a professional team is so valuable. Your makeup artist will need to know which kind of film you are being prepared for. Don't be alarmed if you find makeup is stronger than what you would normally wear for daytime.