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  2. Dermatographic urticaria - Wikipedia

    en.wikipedia.org/wiki/Dermatographic_urticaria

    Signs and symptoms. Dermatographic urticaria is sometimes called "skin writing", as it is possible to mark deliberate patterns onto the skin. The condition manifests as an allergic-like reaction, causing a warm red wheal to appear on the skin. As it is often the result of scratches, involving contact with other materials, it can be confused ...

  3. Vitamin C - Wikipedia

    en.wikipedia.org/wiki/Vitamin_C

    Vitamin C is an essential nutrient involved in the repair of tissue, the formation of collagen, and the enzymatic production of certain neurotransmitters. It is required for the functioning of several enzymes and is important for immune system function. [6] It also functions as an antioxidant.

  4. Vitamin C megadosage - Wikipedia

    en.wikipedia.org/wiki/Vitamin_C_megadosage

    Vitamin C megadosage is a term describing the consumption or injection of vitamin C (ascorbic acid) in doses well beyond the current United States Recommended Dietary Allowance of 90 milligrams per day, and often well beyond the tolerable upper intake level of 2,000 milligrams per day. [1] There is no strong scientific evidence that vitamin C ...

  5. Megavitamin therapy - Wikipedia

    en.wikipedia.org/wiki/Megavitamin_therapy

    Megavitamin therapy is the use of large doses of vitamins, often many times greater than the recommended dietary allowance (RDA) in the attempt to prevent or treat diseases. Megavitamin therapy is typically used in alternative medicine by practitioners who call their approach orthomolecular medicine. [1] Vitamins are useful in preventing and ...

  6. Porphyria cutanea tarda - Wikipedia

    en.wikipedia.org/wiki/Porphyria_cutanea_tarda

    Porphyria cutanea tarda is the most common subtype of porphyria. [1] The disease is named because it is a porphyria that often presents with skin manifestations later in life. The disorder results from low levels of the enzyme responsible for the fifth step in heme production. Heme is a vital molecule for all of the body's organs.

  7. Scurvy - Wikipedia

    en.wikipedia.org/wiki/Scurvy

    Scurvy is a disease resulting from a lack of vitamin C (ascorbic acid). [1] Early symptoms of deficiency include weakness, fatigue, and sore arms and legs. [1][2] Without treatment, decreased red blood cells, gum disease, changes to hair, and bleeding from the skin may occur. [1][3] As scurvy worsens, there can be poor wound healing ...