Im doing a tough mudder race on october, (10-12miles with 25 military obstacles designed by british military forces) should i take any multivitamin?

Probably: Vitamins are important for you to get through your diet. If you feel you do not get the necessary daily requirements through a balanced high content of plant based diet, its best to take a multivitamin each day regardless of tough mudder race or not. In general, use a high quality multi vitamin tablet such as new chapter brand as insurance to ensure you get your daily vitamins and minerals.