The name “Uva Ursi” comes from the Latin uva, “grape, berry of the vine”, ursi, “bear”, i.e. “bear’s grape”. Its botanical name is Arctostaphylos and it is of the Ericaceae family. This herb is a main ingredient in Hulda Clark’s kidney cleanse treatment. The active ingredient in the bearberry is Arbutin which has antibacterial and astringent characteristics. Arbutin glycoside concentration in the plant is rather high exceeding 10%. In order for the proper bio-chemical reaction to occur, the users urine should be alkaline. Hydroquinone, left after molecule division, will act as a potent microorganism killer, accounting for the plant’s ability to fight urinary organ infections. Besides arbutin, the plant contains ursolic acid, tannic acid, gallic acid, some essential oils and resins, hydroquinones (mainly arbutin, up to 17%), tannins (up to 15%), phenolic glycosides and flavonoids.

Uva Ursi works best when the urine is alkaline. Taking small doses of sodium bicarbonate will help assure alkaline urine. Drop 7 grams of baking soda in a cup of water, and drink it, when using the remedy. However, where hypertension is possible or diagnosed, baking soda is not recommended.

Capsules or pills based on uva ursi extract which includes 20% arbutin, are used in a quantity of 250 mg on average thrice a day. In the form of a tincture the plant is applied in a dose of 15 drops, thrice a day. If infused in alcohol, the tincture is used in a dose of 5 ml thrice a day. Uva ursi should be taken for a maximal period of two weeks. The antibacterial effect of each dose of Uva Ursi reaches its peak 3 to 4 hours after administration. 

The ability of Uva Ursi to promote the excretion of fluids has made it valuable in reducing excess water weight or bloating.  Moreover, it helps to reduce the accumulation of uric acid in the blood and promotes the flushing and elimination of wastes and toxins from the system. This helps to ease rheumatism and other diseases marked by the accumulation of acids and waste products, such as gout, arthritis, nephritis and kidney stones.  There have been reports that Uva Ursi may also help to dissolve kidney stones.