Yes, you can overdose on vitamins and supplements, so it’s important to take care with the supplements you’re taking.
You should not take more than one multivitamin a day.
These products will often contain the same vitamins and this can lead to you accidentally taking too much.
If you’re taking a multivitamin, you should also be very careful if you’re taking any separate singular supplements, such as a vitamin d supplement — you could end up taking too much if these overlap.
You can find out which vitamins and minerals are in your supplements by checking the nutritional values table on the packaging, so make sure you’re never doubling up on any nutrients.
If you have any concerns, make sure to speak to your doctor or pharmacist, just in case.