with vitamins c, d 3, zinc & selenium for normal immune function*, delivers high-strength vitamin d 3 at 25µg (1000iu), convenient, one-a-day, vegetarian-friendly tablet providing 1, 3/1, 6 beta glucans for more information, please read our vitamin d faq//b 111//class=f-brand!importantour high-performance beta glucan supplement is an excellent choice for those who exercise regularly, lead busy & active lives, or simply want to support their immune health. it's the perfect partner to some of our other best-selling products, including ashwagandha, rhodiola rosea, & berryguard®, & quercetin. this convenient, one-a-day formula contains 250mg of highly purified & concentrated 1, 3/1, 6 beta glucans extracted from the cell wall of a proprietary strain of baker's yeast called saccharomyces cerevisiae. our beta glucan supplement also delivers 25µg of vitamin d 3, 150mg of vitamin c, 10mg of zinc & 110µg of selenium, all of which contribute to the normal function of the immune system.* the inclusion of selenium further contributes to the protection of cells from oxidative stress. we've chosen to formulate our beta glucans as tablets, not capsules. tablets can accommodate a higher amount of active ingredients, making it the most appropriate casing for this broad-spectrum formula. to meet our rigorous quality standards, we manufacture & package our beta glucan supplement in uk factories working to good manufacturing practice (gmp). although this formula is naturally gluten-free & vegetarian-friendly, it's not suitable for vegans. still unsure if our beta glucan supplement is the right choice for you? have a chat with one of our expert nutrition advisors. they have a wealth of experience between them & are always happy to help with free & confidential advice. simply click the chat button located at the bottom right-hand side of our website. for more information on vitamin d 3, please read our vitamin d faq//b 111//class=f-brand!important.what do beta glucans contribute to?our beta glucan supplement contains vitamin c, vitamin d 3, zinc, & selenium, all of which contribute to the normal function of the immune system. the addition of selenium also contributes to the protection of cells from oxidative stress. for more information on beta glucans, please read our article why we don't sell mushroom//b 757//target=_blank.