Blueberry leaf (Vaccinium spp)*

Has a long history of use for diabetes. It contains myrtillin which lowers blood sugar levels. Blueberry leaf also acts as a mild diuretic astringent and urinary antiseptic.

Dandelion fresh root (Taraxacum officinalis)*

An excellent bitter tonic that stimulates hydrochloric acid, bile, liver, pancreatic and small intestine enzymes. It is indicated for chronic constipation due to poor digestion—clay colored stools, poor fat metabolism and sluggish liver function. A rich source of inulin and a fructoligerosaccharide (FOS), Dandelion root stimulates the growth of healthy bowel flora.

Devil's Club root bark (Oplopanax horridus)*

Indicated in cases of poor sugar metabolism to increase pancreatic beta cells' ability to produce & utilize insulin. It is used to treat diabetes (under medical supervision). As an adaptogen Devil's Club strengthens adrenal/pancreatic/hypothalamus function. It is also a laxative and an anti-inflammatory agent for use in arthritis. 

Gentian root (Gentiana lutea)*

A profound digestive bitter excellent for stimulating digestion, absorption and elimination. It is indicated for atony of the stomach, large and small intestines, dysbiosis, and intense cravings for sweets especially with fatigue (hypoglycemia).

Gymnema herb (Gymnema slyvestre)*

Called Gurmar or sugar destroyer in Ayurvedic medicine, this herb is used to treat glycosuria (sugar in the urine) and diabetes mellitus. The herb is also used as a diuretic, astringent and as a treatment for fevers and colds. 

Cinnamon bark (Cinnamomum cassia)*

An effective and pleaseant tasting circulatory stimulant. It improves peripheral circulation especially to the small capillaries and is useful for spider veins and Raynaud's disease. Cinnamon increases the beta cells of the pancreas' ability to utilize endogenous insulin, thus helping insulin resistant diabetes. 

Bibliography:

Bartran, T.  Encyclopedia of Herbal Medicine, Dorset, G.B., 1995

Kapoor, L.D.  CRC Handbook of Ayurvedic Medicinal Plants, Boca Raton, FL, 1990

Moore, M.  Medicinal Plants of the Desert and Canyon West, Santa Fe, 1989

Weiss, R.  Herbal Medicine, Beaconsfield, England, 1988