Harm to the solarium. Opinions of specialists.

What is the harm of the solarium? Or is the solarium safe? The opinion of the representative of the industry, specialist and owner of the tanning studio. And also the opinion of a dermatocosmetologist. What is tan? What is the use of ultraviolet rays? What is equipped with a modern solarium? Why sunburn on the beach is more harmful than sunburn in the solarium? For whom the harm of the solarium is quite real, and who can sunbathe safely enough? How harmful is the tanning bed to children?