This product contains vitamin D3 at a dose of 4000 IU per capsule. Some precautions to keep in mind when taking this supplement include: 1. Consult your doctor before starting this supplement, especially if you have a pre-existing medical condition or are taking other medications. 2. Follow directions for use and do not take more capsules than directed. 3. If you experience any side effects or allergic reactions, such as rash, swelling, or difficulty breathing, discontinue use and seek medical attention immediately. 4. Keep this product out of the reach of children, as an overdose can be harmful. Remember this is general advice and it is always advisable to consult a healthcare professional before starting any supplement.