These are ultra-fine oxygen bubbles (1,000 times smaller than a human hair – ~0.2μm) – so small that they are invisible to the naked eye and even under a light microscope. They penetrate deep into the pores, supplying skin cells with pure oxygen and unfolding their clarifying effect, effectively combating bacteria and providing a deep cleanse. At the same time, this increases cell metabolism and reduces irritation.

Yes, the Oxygen Water is highly tolerable – completely free of irritating or harsh ingredients – and can be easily combined with other active ingredients. Allow your skin to dry completely before applying any further products. When combining it with other products, simply ensure that the additional products do not contain antioxidants such as vitamin C, retinol, Q10, or asyxanthin, as these would react with the oxygen and lose their effectiveness.

We recommend applying the product twice daily (morning and evening) to cleansed skin. This will give you the best skin results.

Since our Oxygen Water consists only of oxygen and highly filtered water, it is particularly well-tolerated and there is no potential for irritation or other side effects from the product itself. However, there may be specific skin predispositions that could lead to a skin reaction to the product.

The bottle is marked with 7 daily units for your use. Divide the daily unit between morning and evening. Spray 25 times evenly onto your face morning and evening using the included spray nozzle and then gently massage it into your face in small circular motions to loosen the pores and allow oxygen to penetrate more easily.

No, you let the product soak in completely until your skin is dry.

Yes, our Oxygen Water is suitable for all skin types, especially for blemished and sensitive skin.

Yes, absolutely! The application is designed as a 7-day course and should be used twice daily, morning and evening.

Yes, there are scientific studies for Oxygen Water by Merme that were conducted at independent institutions.

Our clinical studies prove that a clearer complexion and fewer impurities can be seen after just 14 days.

The application is designed as a 7-day course and should be used daily, morning and evening. You will achieve good results if you use the product for 2 weeks consecutively; however, success also depends on the severity and type of skin imperfections, which is why we offer our product as a 4-pack for use over 4 weeks.

Unopened, the product has a shelf life of at least 3 months. Once opened, we recommend consuming the Oxygen Water completely within one week to ensure maximum effectiveness of the active oxygen microbubbles.

The oxygen microbubbles contained in this product are very fine and sensitive to air and light. For optimal effectiveness, the product should therefore be used within 7 days of opening.

Yes, it contains only four very mild, dermatologically safe ingredients and is also safe to use during pregnancy and breastfeeding.

Unlike products containing AHA, BHA or other acids, Oxygen Water by Merme cleanses pores without irritation and without a peeling effect.
The innovative oxygen microbubble technology works deep within the pores without stressing the skin barrier – ideal for sensitive skin types that often cannot tolerate classic acid treatments.

We use a very small amount of HOCl solely as a stabilizer – not as an active ingredient. It is approximately one hundred times lower than in pure HOCl products intended for skin treatment. It serves to support formula integrity and not directly contribute to skin health. Therefore, we do not specify an exact percentage.

Light protection: HOCl is sensitive to UV and visible light and can degrade as a result. Therefore, we always store the bottles in a box before use. At home, simply store it in a cupboard or drawer, protected from direct sunlight – and yes, it will keep for up to 7 days after opening.

We focus on the microbubbles – not the oxygen itself – because they are the actual oxygen carriers. Our formula is full of them. It's not about a fixed oxygen percentage, but about how effectively it is generated, stabilized, and released. That makes all the difference. On average, there are more than 40,000,000 microbubbles per ml.

The oxygen content hardly changes over time as long as the bottle remains sealed. The only thing that happens over a longer period is the size of the microbubbles, as bubbles merge together over time. This effect is minimal, but still measurable, which is why we play it safe and use a fixed expiration date.

After seven days, the product's effectiveness begins to decrease. The blisters become slightly larger, which can reduce penetration. For optimal results, we therefore recommend using the product fresh.

• Skin cleansing (detoxification reaction)

Oxygen cleanses the pores. In cases of clogged pores or skin congestion, the microbubbles and HOCl can bring underlying impurities to the surface.

This can manifest itself in the first 3-5 days as increased rashes, small blackheads or blemishes.

Often mistaken for a negative reaction, but is usually temporary.

• The barrier is already compromised.

In cases of excessive exfoliation, sunburn, or skin sensitized by retinol, acids, or a damaged barrier, even a gentle mist can cause burning or inflammation.

HOCl is gentle, but still slightly acidic – and the bubbles can enhance the penetration of active ingredients.

MERME offers for the productOxygen Water by MermeA voluntary 30-day money-back guarantee. You can find further information in theTerms and conditions of the voluntary 30-day money-back guarantee.