It's in the name.
Butyrate takes its name from butter, where it was first found. Your own gut bacteria make it too, by fermenting the fiber you eat. BUTTYR is named for it.
Before BUTTYR was a brand, it was the gut supplements Natalie actually took, read closely, and compared.
One word kept coming up in everything she read. Butyrate. It was all over the research she saved, and almost nowhere in the conversation. Ask most people what it is and they will tell you they don't know.
So she started building. Much of the work happened late at night. She pulled up competing products on the brands' own websites and checked the doses against the labels herself, after an AI-built comparison table got one wrong.
“We want to keep all the dosages of each ingredient at a meaningful amount.”
Natalie, on the formula · June 2026
That one sentence cost her the easy version of this business. They had hoped for three capsules a day. Keeping every dose meaningful took four, so four it is. It also meant a fully custom formula, and she knew going in it would be “very expensive.” She chose it anyway. She had built an early version with a practitioner she trusts, then revised it herself and went looking for more opinions. But the spec was hers. In her words: “I am the one suggesting.”
Then she gave it a body worth keeping. Natalie led the brand: amber glass to keep light out, a clinical voice, a label where every number can be read. She wanted it, in her words, “somewhat pharmaceutical,” never playful. When the renders came back gold, she sent them back. Not gold, she said. Butter yellow.
BUTTYR is the supplement she went looking for and couldn't find. Butyrate at its core, six actives in plain sight, beautiful enough to leave on the counter.
- Fall 2025
The plan, in one message: a brand called Port Rx, a first product called BUTTYR, and a standard of clinical simplicity.
Late 2025
Natalie Bronco
Founder, Port Rx
