Samples undergoing fructose analysis require a quick and simple 1 in 5 pre-dilution with the Sentia fructose buffer, sold separately. Samples undergoing glucose testing do not require a sample dilution. <br /> ***Please note that all Sentia Strips ship Next Day Air by default. <br /> ***Please order strips separately from other items. <br /> ***When strips are in the shopping cart, no other types of items may be added.">