FLEX-SOLL collagene 20 vials by WINTER: Winter has prepared the Flex-soll collagene nutritional supplement to promote good joint health. It acts as an anti-inflammatory and nourishes to strengthen bones, joints and cartilage. Provides elasticity to joint movement. How to use: Take one or two tablets a day with a glass of water, preferably outside of meals. During the first month the dose can be increased up to four tablets a day.