Can a person suffering with vitilgo can consume...

can consume folic acid 400mcg+ B12 supplements together?
yes you can , they don't interfer with each other or with vitiligo
How is vitiligo treated?
There is no definitive treatment for vitiligo. The goal of medical treatment is to create a uniform skin color by either restoring the color or removing the residual color. Skin pigmentation treatment can be used with the drug Monobenzone. If the disease is widespread, steroids can be taken orally or in the form of a cream on the skin. Results may take up to 3 months. Topical vitamin D analogues. Topical immunosuppressants such as calcineurin inhibitors.
Light therapy where narrow-band ultraviolet (NB-UVB) requires two to three treatments per week for several months.
Excimer Laser rays from the wavelength of ultraviolet light near narrow-band UV rays.
The surgical procedure is performed by self-patching skin. Skin is taken from one part of the patient and used to cover another part. Possible complications include scarring, infection, or pigment failure. Finally, a type of tattoo is usually applied to people with vitiligo.
What is Vitiligo?
Vitiligo is a skin disorder that causes a loss of color. Light or white areas appear on the person's skin. If vitiligo occurs in the hair-bearing area, the hair color in those areas may turn white. This condition occurs when the melanocytes (the skin cells that produce melanin, the chemical that gives the skin their color, or pigmentation) are destroyed by the immune system in the body.
What causes vitiligo?
Although the causes of vitiligo are not fully understood, there are a number of different theories
    Autoimmune disorder: An infected person's immune system may infect antibodies that destroy melanocytes.
    Genetic factors: Some factors that may increase the chance of developing vitiligo can be inherited. About 30% of cases of vitiligo are common in families.
    Neurological factors: a toxic substance for melanocytes that can be released at the nerve endings in the skin.
    Self-destruction: melanocyte dysfunction