Food matters more than the clock
Because vitamin D is fat-soluble, taking it alongside a meal with some fat may help your body absorb it. Breakfast, lunch, or dinner can all work — pick whichever meal you rarely skip.
Taking it on an empty stomach is not harmful, but pairing it with food is an easy way to be consistent.
Can I take it with other supplements?
Many people take vitamin D at the same meal as other daily supplements to keep things simple. If you take several, a checklist helps you not double up or miss one. Pillog groups your doses, lets you check them off from the notification, and keeps it all on your phone with no account.
How much vitamin D suits you depends on your situation, so let your doctor or pharmacist guide the amount.