How perfectly the microbes endure is essential to their efficiency, so the most beneficial probiotics will make sure the microbes get to the gut largely intact.
1,000 IU could be an satisfactory dose for a few but https://biobodyboost.co.uk/products/saccharomytum-vegan-biotics-and-vitamin-d3?_pos=1&_psq=sacca&_ss=e&_v=1.0