OUR MISSION
UBU —You Be You.
“We started Rainbow Smile with a simple belief: when you care for the tiny world inside your mouth, your whole self feels the difference. Your smile isn’t just about teeth — it’s a living connection to your gut, your immune balance, and your daily well-being. Our mission is to create oral care that treats your body with kindness, from the inside out.”
The Movement
The Biome Hacker ™Revolution.
Most oral care fights what nature designed to flourish. We believe in harmony, not warfare — in nurturing the oral ecosystem that bridges mouth, gut, heart, and mind. Because your smile is alive, and balance is where beauty begins. When this natural harmony is supported, your whole body benefits.
Rainbow Smile is formulated to promote a balanced oral environment with plant-based ingredients, bioavailable oxygen, and gentle microbiome support. Because true wellness doesn’t begin in a lab — it begins with a smile that feels alive.
Oral · Gut · Brain Axis
Oral care is self care. Oral care is gut care.
Your mouth is the gateway to your gut — and your gut is the gateway to your mind. Every swallow of OG3™ carries oxygen-rich, microbiome-friendly compounds into your oral-gut axis.
When your oral ecosystem thrives, your digestion improves, your immunity strengthens, and your energy rises. This is whole-body wellness beginning with 60 seconds.
Oral Microbiome
Gut Microbiome
Brain & Body
What We Stand For
Our Values & Impact.
Unity in Diversity
A rainbow is many colors, yet one arc. We celebrate individuality and believe authenticity is nature’s highest form of beauty. Every microbiome, like every person, is unique — and true balance arises from honoring that diversity.
Joy, Always
Wellness should feel alive, not clinical. Every bottle we make is designed to spark a small moment of joy — a ritual that reminds you to smile, breathe, and reconnect with your body’s natural brilliance.
The Oral–Gut Connection
Your mouth is the gateway to the body’s overall balance. By caring for it consciously, you help support healthy digestion, circulation, immunity, and mood. We’re redefining oral care as mindful, whole-body care.
Impact That Travels
Your purchase helps Rainbow Smile donate oxygen-infused oral care to underserved villages in Kenya through our non-profit alliance with Springboard Connectivity. Together, we’re spreading access, balance, and hope.
The People
Meet Our Team.
Tracy Tallow
Co-Founder, Chief Operations Officer
William Lendal Robertson
Founder, Chief Executive Officer
Dr. Vanita K. Gupta, PhD, MBA
Chief Founding Science Officer
Marcos Genoud
Brand Design
Deji Wessey
Chief Financial Officer
Marigold Bloom
Chief Joy Officer
Need Help?
Frequently Asked Questions
What is Biome Food™?
Biome Food™ is our proprietary blend of prebiotic, microbiome-friendly nutrients that feed the beneficial bacteria in your mouth — helping your oral ecosystem stay balanced and thriving.
What is OG3™?
OG3™ is our oxygen-rich oral care formula, designed to support the oral-gut axis with bioavailable oxygen and plant-based, microbiome-friendly compounds.
How do I use the spray vs. the pump?
Use the spray for quick, on-the-go freshness, and the pump for your daily measured ritual. Both deliver the same OG3™ formula — choose whichever fits the moment.
What does sublingual mean?
Sublingual means “under the tongue.” Holding the formula there briefly lets the active compounds absorb directly through the tissue for faster delivery.
Is it really safe to swallow?
Yes. Every ingredient is food-grade and designed to be swallowed safely, carrying its benefits along your oral-gut axis.
Love Serves All
Your Unique Biome. Unlocked
Join 50,000+ biome hackers who’ve returned to their original design. Sophisticated science. Joyful results. Every smile — uniquely yours.
Donates to Underserved Communities · springboardconnectivity.org