The Thorne Vitamin D3 + K2 Liquid Drops are designed for adult use with a 1 fl oz volume size, making it easy to measure and consume after a meal. This liquid formulation offers a convenient way to receive the immune support benefits of vitamin D, along with the added bonus of vitamin K2. Sealed and brand new with a long expiration date, these drops provide a quick and effective way to supplement your daily vitamin needs for optimal health and wellness.