What is the maximum vitamin D you should take daily?

The recommended daily intake of vitamin D is 600 international units (IU) for adults between the ages of 19 and 70. However, the upper tolerable limit is 4000 IU per day, which is the maximum amount you should take in a day. If you are over 70 years of age, the recommended daily intake is 800 IU. Higher doses of vitamin D should only be taken under the guidance of a healthcare professional.