Q. I am self-employed personal trainer. I pay rent to various local gyms where I train my clients, supply my own uniform and make my own appointments. I have to look the part to get work, so I take body-building supplements. Can I claim the cost of those supplements as a business expense? A. The supplements are a form of food, and as such it has a dual purpose; to keep you healthy and prepare you to undertake your work. So it is very unlikely that the Taxman would agree that your body-building supplements are tax allowable. If you would like any further information, please do not hesitate to contact Southside Accountants Wimbledon & London.