PREP Faq

How does PREP specifically prepare my skin for the OS-01 FACE Topical Supplement?

Dead skin cells, dirt, and ingredients in makeup and sunscreen can create build-up on the skin that prevents products from fully absorbing. PREP gently dissolves this build-up without disrupting your natural lipid barrier so that OS-01 FACE can absorb more readily–ensuring you see maximum results from our OS-01 peptide. 

Is PREP safe / clean?

Like all OneSkin products, PREP is clean, vegan and cruelty-free. Using our high standards for scientific rigor, we formulate the safest, most effective products possible.

The Environmental Working Group (EWG) rates skincare ingredients on a scale of 1-10, with a score of 1 being the safest. PREP received an average score of 1.235 and a weighted average of 1.095 based on the EWG’s SkinDeep Cosmetics Database scoring guidelines. 

PREP was also tested for human sensitization (RIPT - a clinical study to assess skin irritation) and no adverse effects were found.

PREP was rated 91% and Top Allergan Free by SkinSAFE. SkinSAFE helps people with sensitive skin find best-in-class products with breakthrough AI-powered science and patch testing data in partnership with the Mayo Clinic.

How should I integrate PREP into my current skincare routine?

Use PREP every evening to cleanse your skin, followed immediately by OS-01 FACE. If you have oily skin and prefer to cleanse both morning and night, you can also use PREP to wash your face at the start of each day. 

PREP has not been shown to produce adverse reactions when used with other products and can be safely incorporated into your current routine.

Remember, it’s always best to patch test any new skincare product.

Do you ship internationally?

We currently ship to the U.S. and Canada. We are working on adding international shipping options. Sign up for our newsletter for updates as we continue to expand.

What is the approximate shelf life for PREP? 

PREP has a shelf life of 24 months. 

How should PREP be stored?

PREP can be stored at room temperature.

Is PREP packaging recyclable?

Yes! The PREP bottle is 100% recyclable. 

 How does PREP refillable packaging work?

Your shipment will come with an empty bottle and a pouch of cleanser to fill the bottle. If you are signed up for a subscription, please keep the bottle, as you will be sent a new pouch on a recurring basis to refill the bottle. If you are making a one-time purchase, you can indicate whether you would like to be shipped a bottle and pouch or just the pouch. 

How long will one bottle of PREP last?

The 200 ml bottle will last approximately 1-2 months, when used as directed.

Have any more questions?

For our comprehensive FAQ list click here.