SHIITAKE MUSHROOMS

have natural antiviral and immune system-supporting properties
support the cardiovascular system, protect against diseases including atherosclerosis by preventing too many immune cells (adhesion molecules) from binding to the lining of blood vessels.
A 2007 study published in the “Journal of Agricultural Food Chemistry” by Josefine Enman found that shiitake mushrooms contain the cholesterol-lowering compound eritadenine.
are rich in B vitamins, riboflavin, niacin and B5, that benefit your metabolism by helping your body convert food into energy. B vitamins also help your body make red blood cells, protecting you from developing anemia.
Four cooked shiitake mushrooms contain 17.9 micrograms of selenium, more than a third of the Recommended Daily Allowance. A 2010 article in the journal “Nutrition and Metabolism” showed that high blood levels of selenium is associated with a lower occurrence of abnormal blood glucose levels, a condition known as dysglycemia.
One cup of stir-fried shiitake mushrooms contain 290 milligrams of potassium, a mineral that is crucial to heart function, muscle contraction, digestive and muscle function, according to the University of Maryland Medical Center. The RDA for potassium is 4,700 milligrams for adults.
Log-grown shiitake mushrooms have anti-cancer properties, according to Japanese researchers who published a study in "Cancer Science" in 2011. The research team gave a powdered shiitake extract to mice with melanoma and found that their tumors stopped growing. Shiitake extract appears to restore melanoma-reactive T cells, an important aspect of cancer treatment. Log-grown shiitake are higher in bio-available complex carbohydrates called polysaccharides, and lentinan, compounds responsible for inhibiting tumor growth.
sustainably produced on hardwood oak logs carefully harvested on our farm.

NUTRITION:

A half cup (72.5 grams) of cooked shiitake mushrooms have:

.65mg copper (72% RDV)
2.61gm pantothenic acid (52% RDV)
17.98mcg selenium (33% RDV)
.12mg vitamin B2 (9% RDV)
.96mg zinc (9% RDV)
.15mg manganese (8% RDV)
.12mg vitamin B6 (7% RDV)
1.09 mg vitamin B3 (7% RDV)
26.68mg choline (6% RDV)
1.52 g fiber (6% RDV)
20.30 IU vitamin D (5% RDV)
15.22mcg folate (4% RDV)
1.13g protein (2% RDV)
10.43g carbohydrates (5% RDV)
40.6 calories (2% RDV)

Sources:
here and here