Bryan Johnson's Water Filter: Reverse Osmosis Setup and Water Testing (2026)

By ProtocolPicksPublished October 20, 2026

How Bryan Johnson filters his drinking water, the five stages his protocol lists, a $211 under-sink reverse osmosis system that follows the same idea, and how he tests his water. Scope: This summarizes his published protocol and a May 2026 post on his home. He names no filter brand. It is not medical advice.

Filter and test, side by side

Product	Price	What it does	Bryan's link to it	Buy
iSpring Alkaline RO System	$211.49	6-stage under-sink reverse osmosis with alkaline remineralization. NSF/ANSI 58.	Bryan: Same type as his: RO plus remineralization. Brand unnamed.	Check Price: iSpring RCC7AK-BN NSF Certified, 75 GPD, Alkaline 6-Stage Reverse Osmosis System, pH+ Remineralization RO Water Filter System Under Sink Patented Top-Mounted Faucet Design for Easy Installation
Tap Score Advanced Water Test	$269.00	Mail-in lab test for 116 analytes, including lead and copper.	Bryan: He tests with SimpleLab, which makes Tap Score.	Check Price: Advanced Home Water Test Kit \| Well or City \| EPA Certified Drinking Water Labs \| Tests for: 116 Analytes, incl. Lead, Copper, Hardness & Alkalinity and More

Amazon prices as of October 2026. They change often.

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What the sources show

What his protocol says he uses

The clean water section of his protocol describes an alkaline water filtration system that cost him $1,300, and says similar systems cost about $300. It lists five stages: Carbon filtration for dirt and volatile organic compoundsReverse osmosis membrane, after which he says the water is more than 85% pureMixed bed deionization to remove what the membrane missesRemineralization and alkalization with coral calcium sandCoconut carbon fiber for taste He does not name the brand. The protocol gives a phone number for the person who sells his system, so it is not a retail product you can compare on Amazon.

Sources:[1]

Why he filters, in his own words

In his May 2026 post on changes to his home, he lists heavy metals, PFAS, microplastics, pesticides, volatile organic compounds and pharmaceutical residues as things that can be in tap water. He says he has a reverse osmosis system, that it takes dissolved solids from over 300 mg/L to 25 mg/L, and that any reverse osmosis system should include a remineralization step. He also says to clean or replace filters every few months.

Sources:[2]

A cheaper system that follows the same idea

The iSpring RCC7AK ($211.49 on Amazon when we checked in October 2026) is a 6-stage under-sink reverse osmosis system, certified to NSF/ANSI 58, with a final alkaline remineralization stage. That covers the two steps his May 2026 post stresses: reverse osmosis plus remineralization. It does not have the deionization stage his own system lists. It is a match by type, not his unit.

Sources:[1][2]

Test before and after

His protocol says he uses SimpleLab to test his water. SimpleLab's home product is Tap Score: you collect a sample, mail it to a certified lab and get a report. The Advanced kit covers 116 analytes, including lead, copper, bacteria, nitrates and disinfection byproducts. Testing first tells you what your tap water actually has in it, and a second test after installing a filter shows whether it is working.

Sources:[1][3]

What the sources do not show

The sources describe what Bryan Johnson uses and why. They do not test any filter's performance or show health outcomes from filtered water, and he does not say which Tap Score package he orders.