The preventive dose can be varied from person to person. (SweetCure suggests 3g. You can experiment and adjust the dose to suit your own conditions)

Domenici L, Monti M, Bracchi C, et al. D-mannose: a promising support for acute urinary tract infections in women. A pilot study. Eur Rev Med Pharmacol Sci. 2016;20(13):2920-2925.D-mannose is very safe, even for long-term use .... Although D-mannose is a simple sugar, very little of it is metabolized. It doesn't interfere with blood sugar regulation, even for diabetics. It creates no disruption or imbalance in normal body microflora. It's safe even for pregnant women and very small children. In the less than 10% of cases where the infection is a bacterium other than E. coli, antibiotics can be started in plenty of time." Dr Wright Ahmed H, Davies F, Francis N, Farewell D, Butler C, Paranjothy S. Long-term antibiotics for prevention of recurrent urinary tract infection in older adults: systematic review and meta-analysis of randomised trials. BMJ Open. 2017;7(5):e015233. doi:10.1136/bmjopen-2016-015233 The process will take longer than usual to subside Urethral Infections due to the fact that D-Mannose in urine, unlike it remains in bladder for quite a long while, does not stay very long in urethra when one pass water. So, it does not work as effective it to bladder as to urethra. What D-Mannose is made from: Most of them are made from corn and are sold cheap on the market. If you are allergic to corn, choose D-Mannose that are made from tree bark or other plant matter, and are certified Corn-Free (means the final product has NO residues of corn)

Option 1: 500mg tablet (easy to swallow size) each tablet contains less than 0.05g vegetable magnesium stearate and HPMC film coating Porru D, Parmigiani A, Tinelli C, et al. Oral D-mannose in recurrent urinary tract infections in women: a pilot study. Journal of Clinical Urology. 2014;7(3):208-213. doi:10.1177/2051415813518332 This method enables a bit extra time for D-Mannose to pass through the urethra to detach more bacteria off the urethral wall. The clearance of urethral infection symptoms could take about 1-7 days.Waterfall D-Mannose has a mildly sweet taste, which is pleasant. Waterfall D-Mannose can be simply mixed with a favourite drink or tea. Try to avoid mixing with drinks that are acidifying or contain high volumes of sugar, such as Cranberry and Orange Juice. D-Mannose is found naturally in fruits and vegetables in tiny amounts. D-Mannose is linked to glucose due to its structure and slightly sweet taste but is not metabolised like sugar. The NHS recognises D-Mannose as an alternative way to prevent UTIs (updated November 2020). Where does D-Mannose come from?