Brand essentials
THERA Nordic's core:
Healing the gut lining
Get to know the essentials of the science we are built on, and how we stand out in the world of gut health.
Brand essentials
Get to know the essentials of the science we are built on, and how we stand out in the world of gut health.
Our hero products side by side
The simplest way to think about it: REZCUE is everyday upkeep, HEALIA is intensive, ground-up repair.
A clean, twice-daily drink that renews and protects the gut lining from mouth to large intestine.
Reach for it when you want
Our most powerful lining formula. Four clinically-dosed actives rebuild a damaged lining from the structure up.
Reach for it when you want
Our expertise
This is the whole of what we do. We strengthen the barrier that lets you absorb nutrients while keeping pathogens and other unwanted things from crossing into the tissue, where they would otherwise trigger inflammation, food intolerances and a wide range of gut problems.
The gut lining, up close
On the left, the lining working as it should. On the right, the same lining once a seal gives way.
There is one ingredient we trust most to protect this lining
People assume it is simply zinc and carnosine taken together. It is not. It is a single molecule, and that difference is the whole point.
Locked together
Bind them and something new appears: zinc L-carnosine, also called polaprezinc.
Carnosine wraps the zinc and holds it at four points, so the molecule does not simply come apart on the way through the gut.
Bound this way it is not absorbed early or diluted through the body. It stays in the gut, moving along the lining.
It gives up its zinc only under the right conditions, at the spot that needs it, rather than everywhere at once.
Zinc at the gut wall
The same journey along the gut, ordinary zinc first and then zinc L-carnosine. There is a damaged patch partway along. Watch what each one does when it reaches it.
Ordinary zinc is taken up all along the healthy wall and used up as it travels. It is useful in general, but it reaches the damaged patch with little left to give, and nothing directs it there.
Zinc L-carnosine travels straight past the healthy wall without being absorbed, then gathers at the damaged patch and coats it. There, each molecule hands its zinc to the injured tissue to help it heal from within, while the carnosine stays put, shielding the area and steadying the lining.
Decades of scientific interest
A Japanese prescription medicine since 1994, with a large published literature spread across the whole gut.
Source: PubMed, queried June 2026.
We believe that healing the gut lining is the first goal in gut health. Everything else is supportive.