هل محلول القطران يسبب السرطان .... ؟؟؟؟

[mdar]

مساء الخير للجميع
خلال بحثي عن محلول القطران في النت وجدت بأن منظمه الصحه العالميه قد صنفت 5%واكثر يعتبر مسبب للسرطان (ونحن هنا نستخدم اكثر من 20%)
With many unknown ingredients, the question is not too easy to answer definitively. However, 5% or greater coal tar is classified as a carcinogen (cancer-causing agent) by the World Health Organization's International Agency for Research on Cancer. In this regard, it is in the same category as methoxsalen (used in PUVA therapy for psoriasis) and solar radiation, two other forms of psoriasis treatment. Alcoholic beverages and tobacco also qualify in this category.
There are not too many over-the-counter products that carry the full 5% crude coal tar concentration considered carcinogenic by the WHO, however California law is much more strict in this regard and considers even 0.5 coal tar dangerous enough to require a warning on a product's label . The FDA, in contrast, considers 0.5 to 5% OTC coal tar preparations safe for psoriasis, and there is really no evidence linking these weaker preparations to an increased risk of cancer. Although coal tar compounds have been found in the urine of users of an experimental tar-based shampoo, the concentration of coal tar used was around 100 times greater than that of common OTC shampoos
هل احد عنده تفسير غير هذا وارجو ان اكون غلطان