Directions for use according to the card: adults take 1 capsule a day with water; do not exceed the recommended daily amount. The pack (60 capsules) is designed for 60 servings. The card does not state the time of intake (morning or evening, with or without food). Store in a dry place protected from sunlight and out of the reach of children.
General information (not a manufacturer's instruction): water-soluble vitamins are usually taken regularly, often with a meal — this reduces the likelihood of stomach discomfort; the exact time of intake matters less than regularity.