broad spectrum, high strength sports multi,high in magnesium, antioxidants and vitamin d,designed by sports nutrition experts,manufactured to gmp standards,high in essential trace minerals,chromium, selenium and iodine at potent but safe levels. for more information, please read our |vitamin d faq//b111//class=f-brand !important| multi-guard® sport has been created by sports nutrition experts to provide 26 vitamins and minerals and antioxidants at relevant levels, creating a product that can be used as the basic building block of a supplement regime tailored to your training and sporting goals.magnesium has been included at a high level as research suggests it\'s involved in electrolyte balance and normal energy-yielding metabolism. in addition, recent published studies on bone health mean that we have included vitamin d3 and vitamin k at generous levels.this unique formula then takes the science a step further forward by including potent plant antioxidants. exercise generates an increased number of damaging free radicals which rapidly deplete the body\'s antioxidant reserves. so green tea, quercetin and other citrus bioflavonoids have been added to this already comprehensive multi-vitamin and mineral formula to make probably the best sports multi available in the uk.