At what temperature can these be stored? Can I store it in the fridge?

Products should be stored at room temperature, around 77°F- 86°F, in a cool and dry place away from direct sunlight. Refrigerator is not a suitable environment for storage, so it is not necessary to keep the vitamins in the fridge.

According to the FDA, 75°F - 77°F is a reasonable reference for thermal exposure of vitamins and supplements, for your information.