Main article: Photosensitivity
Marshall ProtocolA curative medical treatment for chronic inflammatory disease. Based on the Marshall Pathogenesis. (MP) patients who are photosensitiveAbnormal sensitivity to sunlight and bright lights. Also referred to as "sun flare" or "light flare." must limit their exposure to light. This article summarizes information related to light restriction for MP patients. In later stages of the MP and/or when the treatment is complete, veterans of the MP may choose to expose their eyes and skin to increasing amounts of light.
Main article: Photosensitivity
Abnormal sensitivity to sunlight and bright lights is known as photosensitivity and sometimes referred to as “sun flare” or photophobia. In the context of the MP, the ultimate cause of photosensitivity is the Th1 inflammatory disease process – not the treatment itself. Exposure to natural or bright artificial light in a photosensitiveAbnormal sensitivity to sunlight and bright lights. Also referred to as "sun flare" or "light flare." person can lead to flares of internal disease activity, including exacerbation of any inflammatory disease symptoms.
Photosensitivity can occur either when the skin is exposed to bright natural light or the eyes are exposed to either natural or artificial light. Photosensitivity symptoms can occur immediately after exposure or begin 1 to 3 days later, sometimes persisting 5 days or more.
Individuals who are photosensitive prior to the MP will likely become more photosensitive on the MP. Individuals who have no signs of photosensitivity may or may not become photosensitive on the MP. Individuals with limited inflammatory symptoms (suggesting early disease) are the most likely to be able to tolerate more light exposure while on the MP. There is no certain way to tell in advance precisely how photosensitive an individual will be while on the MP. Only after an individual has begun treatment can photosensitivity be assessed.
For many members but not all it is prudent to block sunlight from living space, work space and practice limited sunlight exposure and cover up skin with thick dark layers when going out as well as protect the eyes with the proper NOIR glasses.
When in doubt, patients should assume their intolerable symptoms are due to light exposure and reduce sunlight exposure and protect eyes with the proper NOIR sunglassesSpecial sunglasses worn by Marshall Protocol patients to block light..
Main article: Eye protection
MP patients who are photosensitive must protect their eyes from exposure to both natural and bright artificial light by using NoIRsSpecial sunglasses worn by Marshall Protocol patients to block light. or the equivalent sunglasses that prevent all types of radiation from reaching the eyes. Most kinds of glasses are not appropriate for use outdoors on the MP as they do not protect against infrared light.
Of the NoIR sunglasses, there are three options.
Unless it obstructs vision while driving, photosensitive MP patients should wear eye protection (including at night, due to the effect of oncoming car headlights).
It is recommended that patients starting the Protocol buy and wear any of the recommended glasses for two weeks to be safe and to learn if light affects their symptoms in unanticipated ways.
Main article: Skin protection
Because of the effect of light on the skin, Marshall Protocol (MP) patients who exhibit photosensitivity must protect their skin from exposure to natural light. This involves covering windows of indoor spaces to block outside light. When outdoors, it means wearing dark, tightly-woven clothing or multiple layers of clothing, covering most of the body. Sunscreens containing a high percentage of zinc oxide (greater than 15%) may be useful in some circumstances but are not a substitute for other measures. Many MP patients wear hats and gloves as well.
Main article: Outdoor light
Main article: Indoor light
MP patients need not cover their skin indoors if all natural light is blocked. If natural light has not been blocked from their house, they will need to cover their skin and eyes at all times. If natural light has been blocked but artificial lighting exceeds 30 lux, wear appropriate eye protection only. If all natural light has been blocked from the area, and artificial lighting has been reduced to no more than 30 lux, no precautions are needed.
Main article: Physics of light
Both the visible wave lengths and the invisible ultraviolet and infrared wave lengths of light can provide enough energy to create 1,25-D. MP patients must limit their exposure to ultraviolet and infrared radiation.