D Mannose is NOT a Diuretic
Diuretics should be used only under medical supervision and with extreme caution. They are often prescribed by doctors for serious conditions such as high blood pressure and cardiomyopathy. But because they can increase the effects of other medications, and because they can, even in otherwise well people, bring about potentially dangerous electrolyte abnormalities (such as reduced levels of potassium), diuretics must be used with caution. The kidneys are a superb at filtering and monitoring, but this is a finely tuned process where the required amount of sodium and potassium and some water is returned to the blood stream so that equilibrium is maintained whilst the unwanted water goes into the bladder as urine.
A buildup of fluids in the body often resolves itself on its own: if it does not see your doctor as the cause needs medical assessment. In fact, anyone who is thinking of using diuretics to get rid of extra fluid should discuss this with a medical professional and not go it alone. The reason is that diuretics alter the body's electrolyte balance and levels of important minerals such as magnesium can be lowered. That is why it is really important to check sodium, potassium, and magnesium levels when we use diuretics. The doctor is likely keep checking kidney function and blood pressure to ensure all is well when we use diuretics. Using diuretics is medically significant because when electrolytes are imbalanced, you're immediately in a higher risk category for heart failure and sudden death.
Dr Ralph Cinque explains:
'Do diuretics make your kidneys work better? No, they make them work worse. The fluid output goes up but only because the whole discriminatory process has been seriously corrupted. The result is pharmacological dehydration. That's what you get when you take a diuretic. A diuretic adds a layer of pharmacological dehydration to whatever condition you started with. It doesn't address the causes of the original condition. It doesn't normalize anything. On the contrary, it adds another abnormality to the one that already exists. It certainly does not cure, fix, or correct anything.' http://www.drcinque.com/article.html
Natural Diuretics in Food
Celery, Parsley, Coffee, Dandelion, Cucumber, Grapes, Carrots, Water Melon etc. https://www.mayoclinic.org/diseases-conditions/high-blood-pressure/in-depth/diuretics/art-20048129