Check the label first
Probiotics contain living cultures, and different products are made to survive in different conditions. Some clearly say to refrigerate; others are designed to be shelf-stable. The label is the definitive guide for what you have.
Even shelf-stable ones do best away from heat and moisture, so a kitchen cupboard is usually better than a steamy bathroom.
Keeping them effective and remembered
Storing them properly is only half the job — taking them consistently is the other half. If yours live in the fridge, a reminder helps you not forget them there. Pillog nudges you at your set time, lets you check it off from the notification, and keeps your record on your phone with no account and no ads.
If you are ever unsure whether a product needs refrigeration, your pharmacist can confirm.