Cold Season Ahead: Why Peruvians Keep Cat's Claw Tea on Hand

The weather starts turning, the kids go back to school, and somebody in the house always catches the first cold of the season. Amazonian families have had a go-to for that stretch of the year for a very long time.

Cat's Claw, or Uña de Gato, is one of the most talked-about herbs to come out of the Peruvian Amazon, and its reputation has more to do with what's actually in the plant than clever marketing. As the season shifts and immune support becomes the household topic again, here's an honest look at what this vine is, what the research actually shows, and why it's worth keeping in the cupboard right now.

Where the name comes from

Cat's Claw (Uncaria tomentosa) is a thick, woody vine that climbs Amazonian rainforest trees using small curved thorns shaped like a cat's claws, which is exactly where the name comes from. Indigenous communities across the Peruvian and Brazilian Amazon, including the Asháninka people, have used the inner bark for generations, brewed as a tea or simmered into a stronger decoction.

It's not a niche find either. Cat's Claw has become one of the most exported Amazonian botanicals over the past few decades, showing up in supplement shops well outside South America. That popularity is exactly why it's worth separating the honest research from the hype.

What the research actually says

Cat's Claw contains compounds called pentacyclic oxindole alkaloids, which researchers have studied for their effect on immune cell activity. A handful of small clinical studies, including ones looking at osteoarthritis patients, found participants reported less joint pain and swelling while taking Cat's Claw extract compared to a placebo. Other lab research has looked at its antioxidant and anti-inflammatory properties more broadly.

None of that means Cat's Claw prevents illness or works like medicine. The research is real but still limited, mostly small-scale, and mostly focused on inflammation rather than infection. What it supports is the traditional use: a plant people reach for as a general immune and inflammation-support habit, not a guaranteed fix once you're already sick.

Why the timing matters

Herbal immune support, if it does anything at all, works best as a routine built before you need it, not a rescue attempt after the first sneeze. That's the same logic behind starting a daily vitamin before flu season rather than after. People who keep Cat's Claw tea going as the weather turns are treating it the way it's traditionally used in Peru: a standing habit through the cooler, damper months, not a one-off remedy.

A cup or two a day is the typical pattern. It has an earthy, slightly woody taste, milder than you'd expect from something described as a rainforest vine, and it holds up fine with a splash of honey or lemon if the flavor is new to you.

Tea, capsules, or loose leaf

Cat's Claw comes in a few forms, and which one fits depends on your routine more than anything else. Tea bags are the simplest way to build a daily habit since there's no measuring involved. Loose leaf gives more control over strength and is a natural fit if you already brew other loose Peruvian herbs. Capsules exist too, for anyone who wants the herb without the taste or the steeping time, though the tea has the longer track record in traditional use.

Whichever format you pick, consistency matters more than the exact delivery method. A cup skipped most days won't build the same routine as one taken most days.

For other herbs people lean on through the cooler months, our Immune Support collection has options worth pairing it with, and the Inflammation & Joint Support collection covers the anti-inflammatory side of what Cat's Claw is studied for.

A plant that travels well

Part of why Cat's Claw crossed over from Amazonian tradition to shelves worldwide is that the bark ships and stores easily compared to fresher botanicals. Harvesters in the Peruvian Amazon cut sections of the vine in a way that lets it regrow, since a healthy vine can be re-harvested for years rather than pulled up once and gone. That's part of why supply has stayed steady even as demand for the herb grew well past Peru's own borders.

A few cautions

Cat's Claw can interact with immunosuppressant medications, since it may stimulate immune activity, so anyone on those drugs should check with a doctor first. It's also not recommended during pregnancy, and people with autoimmune conditions like lupus or rheumatoid arthritis should talk to a doctor before adding it, given the same immune-stimulating mechanism researchers are studying for its benefits. As with most herbal teas, more isn't better. Stick to the labeled serving rather than doubling up because cold season feels urgent.

We sell this tea and we've read the studies behind it. The honest version is that Cat's Claw is a reasonable, tradition-backed habit to build into the season ahead, not a substitute for a doctor once you're actually sick.

*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.