There is no consensus on the recommended maximum dose of vitamin D. For example, the Nutrition Society recommends a daily intake of 800 IU. However, most vitamin D experts assume that this value is set too low. It is only sufficient to avoid a deficiency, but not enough to keep the vitamin D level at a healthy level. The following formula can be used for guidance for healthy adults: Vitamin D: 50IU per kg body weight Vitamin K2: 2-3µg per kg body weight