ANSWER: There is no standard dose of D-mannose for preventing urinary tract infections (UTIs).

The appropriate dose of D-mannose can vary depending on a number of factors, including the individual’s age, health, and other medical conditions. It is always best to consult with a healthcare provider before using any natural remedy for a medical condition.

Your healthcare provider will be able to recommend the most appropriate dose of D-mannose for you based on your individual needs. It is important to follow your healthcare provider’s instructions and not exceed the recommended dose.

General D mannose Rule

The best dose to use isn’t entirely know, however, research has suggested:

  • For preventing frequent UTIs: 2 grams once daily, or 1 gram twice daily
  • For treating an active UTI: 1.5 grams twice daily for 3 days, and then once daily for 10 days; or 1 gram three times daily for 14 days

You have several option including tablets,  capsules and powders. Your preference will dictate the best method.


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