We’ve Got Chemistry.

Bluu is the first sunscreen with Carbonate Technology™

From ocean chemistry to the precision of cosmetic formulation, every decision was guided by research, rigor, and collaboration. The result is more than suncare it’s a breakthrough in how beauty and science can interact with the world around us.

Ocean Chemistry Simplified

  • The Carbon Sink

    Ocean Absorbs CO2 → Carbonic Acid (Problem)

    The ocean is one of Earth’s largest carbon sinks, helping stabilize our climate and weather. But when it absorbs too much CO₂, the air sea exchange produces carbonic acid, lowering the ocean’s pH and driving acidification.

  • Ocean Acidification's Impact

    Too Much CO2 → Fewer Building Blocks

    Carbonic acid releases hydrogen ions (H⁺), which react with carbonate and turn it into bicarbonate, removing the carbonate that corals and shell-building organisms need to grow.

  • Key Building Blocks for the Ocean's Future

    Carbonate Ions → Ocean Health

    Carbonate ions are essential for corals and other calcifying organisms to build and maintain their calcium carbonate skeletons. Scientists are studying ways to enhance ocean alkalinity, by adding carbonate or similar substances, as a potential large-scale strategy to counter ocean acidification.

Bluu in the Lab

Learn more

Dr. Chris Sabine, former IPCC Nobel Peace Prize recipient and chemical oceanographer at the University of Hawai‘i, explains the role of carbonate ions in coral resilience. Learn how oceans absorb carbon dioxide, forming carbonic acid and reducing pH, a process known as ocean acidification. 

Bluu’s Carbonate Technology™ is designed to increase carbonate ions in seawater, which are building blocks that corals need to grow stronger skeletons.

Filmed at the Hawai‘i Institute of Marine Biology, this video shows how marine scientists are pioneering new approaches to ocean health, connecting rigorous lab research to real-world application.

“Any process that increases carbonate availability helps corals grow.”

— Dr. Chris Sabine, University of Hawai‘i

In controlled seawater experiments, Bluu sunscreen demonstrated measurable increases in carbonate and bicarbonate ions. And, it’s the first sunscreen formulated to work specifically in harmony with ocean chemistry.

Innovation You Can Feel

Formulating Bluu required thinking beyond “reef-friendly.” Our patent-pending Carbonate Technology™ purposefully delivers carbonate ions via a sunscreen emulsion, something never done before.

“My greatest worry wasn’t making sunscreen, it was making sure we went further”

— Jeffrey Lewis, Cosmetic Chemist

Through five years of research and collaboration, Bluu proved that suncare can be elevated for both people and the planet.

Our Collaborators

Bluu’s science was inpired and shaped by leaders in ocean and climate research including:

  • University of Hawai‘i at Mānoa

  • Woods Hole Oceanographic Institution

  • UC Berkeley

Together, we’re setting a new standard: beauty backed by science, built for the future.

“Sunscreen alone isn’t the solution, it’s an invitation. It takes all of us, thinking beyond the ordinary and shifting toward possibility instead of despair. Every choice we make is a chance to be part of something bigger than ourselves.”

– Emma Kraft, Founder & CEO

Going Further.

Through the Bluu Foundation, we fund ocean research, climate resilience projects, and stories that inspire action.

SUPPORT BLUU FOUNDATION

Paint Your World Bluu

Pre-order now and experience our Bluu Paint Pen ($18 value)—perfect for touch-ups on the go.

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