Mushrooms are the >>>ONLY<<< vegetarian/produce based food that can make vitamin D. Actually, they contain a “pro-vitamin,” or precursor, called ergosterol that is converted into vitamin D when exposed to the sun’s ultraviolet (UV) radiation—similar to how your skin synthesizes the vitamin in response to sun exposure. -Berkeley Wellness
Ergosterol is a sterol found in cell membranes of fungi and protozoa, serving many of the same functions that cholesterol serves in animal cells. Because many fungi and protozoa cannot survive without ergosterol, the enzymes that synthesize it have become important targets for drug discovery. Ergosterol is a provitamin form of vitamin D2; exposure to ultraviolet (UV) light causes a chemical reaction that produces vitamin D2.
Ergosterol powder is an irritant to skin, eyes, and the respiratory tract. Ingestion of large amounts can cause hypercalcemia, which (if prolonged) can lead to calcium salt deposits in the soft tissues and, in particular, the kidneys. -Wikipedia
The Skin
Our body tries in many different ways to get rid of toxins. If liver, kidneys and lungs do not fulfill their tasks sufficiently, the body needs help from the skin.
The skin is the largest organ of protection and defense. It is a sensory organ. It serves for thermo regulation, secretion and excretion. The skin plays an important role in the elimination of toxins and can assist the kidneys in their work.
It evacuates the waste products that are classified as crystals. They are soluble in liquids and are evacuated in the form of sweat through the sweat glands. Crystals are the residues of the metabolism of food rich in protein, such as meat, fish, eggs, dairy products, legumes and cereals. Uric acid and urea are part of the group of crystals.
These may also result from an excess of refined sugar or very acidic food. Other types of waste products and toxins are excreted in the form of rashes. -Issels Immuno Oncology