Most vitamins and minerals are fine at room temperature, and it’s not an issue if the cupboard gets a bit warm ... they’d need to be exposed to extreme heat or direct sunlight for their potency to be affected.
That said, it’s always a good idea to keep the lids tightly sealed to protect against humidity.
And if you’d feel more comfortable keeping them in the fridge, that’s totally fine too ... just make sure the bottles stay dry.
Apr 22, 2025