Ellis Day's Balancing Phage Serum is the first-ever phage-containing cosmetic skincare product sold in the U.S. and is a result of years of research and development. The active ingredient is a proprietary blend, or 'cocktail,' of phages that specifically target and kill the bacteria associated with breakouts, skin irritation, inflammation, and discoloration. What’s more, it doesn’t contain any harsh ingredients like benzoyl peroxide that cause skin dryness, redness, and irritation.

We've conducted a 12-week clinical trial with a leading dermatologist. Our phages were shown to be effective (with a confidence level of 99.9%) to target and eliminate bad C.acnes bacteria, which is the culprit for many skin issues including acne, redness, and inflammation. We have also run long-term consumer beta tests with astonishing results: users reported rapid improvement in tone and texture, significant reduction in blemishes, breakouts, and inflammation. Since our Phage Serums work by rebalancing your skin microbiome, the eradication of problem bacteria happens over several weeks, not overnight.

Bacteriophages are abundant in nature as well as on your skin and in your gut. In fact, a billion of them pass through your system every day. Phages also live in oceans, in the forest, and even in clouds - they are everywhere! While phages are designed to kill bacteria, they do not infect human cells.

Phages are specific to the bacteria they target and destroy. So, a phage that destroys the specific bad bacteria we want to eradicate from your skin won’t destroy or harm any other good bacteria.

Probiotics are 'good bacteria' and phages are another kind of microbe that lives on your skin, not bacteria. Live probiotics are used to repopulate an environment, such as your gut or skin, with good, beneficial bacteria. However, sometimes these bacteria have a hard time sticking around due to all the bad bacteria that are already there. Phages, on the other hand, can be used to kill the bad bacteria, which enables the good bacteria that are already there to grow and flourish. Also, note that a lot of probiotic skincare doesn’t actually contain live probiotic bacteria, but instead has chopped up bits of bacteria or bacterial byproducts (ferments). There isn’t any clear scientific data about the value of these non-living probiotic bacteria when applied to the skin.

Our serums are made from gentle, clean ingredients and are compatible with all skin types. In our clinical study, we tested it on both men and women, and across several ethnicities and age groups. None of the study participants experienced any adverse effects.

We currently ship anywhere in the US.

Orders are processed Monday through Friday and are usually shipped out within 48 hours of receiving your order, unless it's after 12pm PT on Friday, in which case it will go out on the following Monday. Depending on the day of the week your order is placed, it may take 5-7 days to arrive.

We have an easy return policy. To make trying our products as risk-free as possible, we offer a 30-day money-back guarantee on all first orders. On all other orders, we offer replacements on damaged or defective goods reported within 30 days of receipt of the order.

Simply email us with your order number and the item(s) you’d like to return at hello@ellisdayskinscience.com within 30 days of purchase. We will provide return authorization, along with a free shipping label.

All refunds will be issued to the original form of payment within 10 business days of receipt of the returned product.