In 1903, the first official nudist club, "Freilichtpark" (Free Light Park), opened near Hamburg. The philosophy was rooted in Lebensreform (life reform)—a response to industrialization and urban pollution. Doctors of the era prescribed sunbathing and air baths (naked gymnastics) to treat tuberculosis and rickets.
While you have to be careful about sun exposure, responsible practices (using sunscreen and limiting peak hours) allow for greater Vitamin D synthesis over a larger surface area of the body than swimwear allows. enaturist