Today, we’ll break down the science of electrolysis, what it does to pesticide molecules at a chemical level, what peer-reviewed studies have found, and just as importantly, what it can't do. No hype. Just science.

Why Rinsing Under the Tap Isn't Enough

The old advice, rinse your produce under running water for 30 seconds, comes from the FDA. It's good for removing soil, surface bacteria, and some water-soluble residues. But many pesticides are designed to be sticky to resist being washed off by rain and irrigation.

The 2026 EWG Dirty Dozen report found traces of 264 pesticides on produce samples that had already been thoroughly washed by USDA technicians before testing, precisely to simulate typical consumer behavior. [1] Spinach, a leafy green most people associate with health, carried more pesticide residue by weight than any other produce type, with an average of four or more different types of pesticides per sample.

Research from Consumer Reports analyzing seven years of USDA data found that roughly 1 in 5 of the 59 common fruits and vegetables examined carried pesticide residues at risk levels. [2] 

Not only that, but even low levels of pesticide exposure accumulate in your body over time, causing problems that no study can fully capture. 

What Electrolysis Actually Does

Electrolysis is the process of using electricity to create a chemical reaction. When you run an electrical current through salt water, a chemical reaction happens.

At the cathode (- negative), water molecules are broken apart and hydrogen gas bubbles off, while hydroxide ions (OH⁻) are left behind in the surrounding liquid, making it more alkaline.

At the anode (+ positive), a different reaction happens; chloride ions from the salt get converted into chlorine gas, which then reacts with the water to form hypochlorous acid (HOCl). This is a well-known and effective disinfectant, and it's also capable of breaking down pesticide residues.

A study by Hao et al. (2011), published in the Journal of Food Science, investigated whether electrolyzed water could reduce pesticide residues on fresh vegetables. The researchers tested three common organophosphate insecticides: acephate, omethoate, and DDVP — and found that soaking spinach in electrolyzed water for 30 minutes produced meaningful reductions in all three, outperforming plain tap water and dish detergent. 

The leading explanation involves the oxidizing agents produced during electrolysis — particularly hypochlorous acid on the acidic side, and hydroxide ions on the alkaline side — reacting with and breaking apart pesticide molecules.

A separate study from the University of Georgia (published in Food Chemistry, 2018) evaluated electrolyzed oxidizing water on three types of produce across three pesticide classes. Results showed electrolysis outperformed bleach, VegWash, and deionized water across all conditions. [3]

Are Different Pesticide Purifiers The Same?

In a crowded consumer market, which pesticide purifier should one choose?

The truth is that most products in this category are dropshipped and rebranded without any care in how the device is designed or built. Garrnish is different in that respect. 

The Design

Garrnish was the original product that designs for safety and effectiveness, using titanium electrodes instead of cheaper alternatives. During electrolysis, the electrode material matters: lower-grade metals leach trace compounds into the water during treatment, which is precisely the opposite of what you want when the goal is cleaner food. Titanium is used in this application because of its very low toxicity profile and its stability under repeated cycles. 

3rd Party Lab Testing

The Garrnish Pesticide Purifier was also tested by SGS, one of the world's leading third-party testing and certification organizations, as well as additional independent laboratories based in the United States. 

The Takeaway

Electrolysis is not a silver bullet. It doesn't eliminate 100% of all pesticide types under all conditions. Buying organic for the highest-risk produce categories remains a complementary strategy. But as a household intervention with genuine science behind it, electrolysis-based purification represents a meaningful step beyond the tap water rinse that most of us currently rely on.

Sources & Citations

[1]  Environmental Working Group (EWG). 2026 Shopper's Guide to Pesticides in Produce. ewg.org/foodnews

[2]  Consumer Reports. "Pesticides pose a significant risk in 20% of fruits and vegetables." April 2024. cbsnews.com

[3]  Hang Qi et al. "Effectiveness of electrolyzed oxidizing water treatment in removing pesticide residues." Food Chemistry, 2018. PubMed ID: 28873606