Unlike most other products in your bathroom, you'll notice all of our products have an expiration date. That's because our products are have minimal amount of natural preservatives.

The AO+ Restorative Mist will keep its potency for up to 1 year in the fridge (opened or unopened) or until the date stamped on the bottle. It will last 4 weeks at room temperature (opened or unopened).

By refrigerating, you extend the life of the bacteria, but if you are moving the bottle in and out of the fridge, it's hard to say how long they will retain activity—somewhere between 4-8 weeks and the expiration date marked on the bottle. Taking the Mist out of the fridge for 24 hours once in a while, and then putting it back, shouldn't make much difference to its shelf-life.

The Probiotic Hydrating Hair Wash, Probiotic Hydrating Conditioner, Daily Acne Treatment Lotion, and Probiotic Moisturizing Serum do not need to be refrigerated. And they expire 6 months after first use. 

Like the above, Probiotic Foaming Cleanser also does not need to be refrigerated. The count-down for this begins after the first use and the buzzer sounds at 8 weeks. That said, most people will go through all of these bottles in about one month.