Fall Equinox Reset: An Honest Look at Riñosan Kidney Tea

September 19, 2026

September 22 lands the same day for everyone on the planet, but it means opposite things depending on where you're standing. In the US, it's the first day of fall: shorter days, cooler mornings, pumpkin everything. In Peru, sitting below the equator, that exact same equinox marks the first day of spring. Same 24 hours, two completely different seasonal resets happening at once.

It's a small detail, but it's the kind of thing that comes up a lot when you're sourcing herbs from the Andes and Amazon: the calendar we build our marketing around (back-to-school, pumpkin spice, holiday season) isn't the calendar Peruvian herbal traditions actually run on. One thing that does show up on both sides of the equator, though, is the instinct to mark a season change with some kind of reset ritual. In Peru, for a lot of families, that ritual involves a cup of Riñosan.

What Riñosan actually is

Riñosan is a traditional four-herb blend: Chanca Piedra ("stone breaker"), Cat's Claw (uña de gato), Horsetail (cola de caballo), and Huamanpinta, a high-Andes herb that's less known outside Peru but shows up in most kidney-support blends there. Each of these has its own long history in Andean and Amazonian folk medicine, mostly centered on kidney and urinary tract wellness and general hydration support.

We want to be straightforward about the word "detox," since it gets thrown around a lot in this category. Your kidneys already filter your blood around the clock without any help from tea. What a blend like Riñosan actually does is give people a reason to drink more water and herbal tea instead of their third soda of the day, which is a genuinely useful habit even if the tea itself isn't doing anything dramatic on its own. The research on Chanca Piedra specifically and kidney stones is preliminary, mostly small studies out of Brazil, and it's not a substitute for medical treatment if you actually have a kidney stone.

How Andean families actually use it

Riñosan isn't typically an everyday, forever tea. It's more common to see it used in cycles, a few weeks at a time, often at a seasonal turning point like this one, then set aside. One cup, brewed for about 10 minutes, once a day, is the usual approach. It's not meant to be chugged by the pot.

Tea, loose leaf, or capsules

If you don't want to deal with steeping, Riñosan also comes as a loose leaf blend for people who prefer to control the strength, or as capsules for a no-brew option. The tea bag version is the most traditional format and the easiest starting point if you've never tried it.

Honest cautions

This isn't a blend to reach for if you're pregnant or breastfeeding, and if you have an existing kidney condition, take diuretics, or are on blood pressure medication, talk to your doctor before starting. Cat's Claw in particular can interact with immunosuppressant medications. As with most of what we carry, this is a traditional wellness tea, not a treatment, and it's worth treating it that way.

If the four-herb blend interests you but you want to try the star ingredient on its own first, our Chanca Piedra Tea is a good place to start, or browse the full kidney and urinary health collection for other options.