Does plant protein help with detox and cleanse? What the research does and doesn't show

"Detox" and "cleanse" aren't standardized medical outcomes, and no clinical trial has tested a plant protein powder, or any commercial product marketed this way, for it. The one critical review that looked for trials of commercial detox diets in humans found none at all.

What the evidence doesn't support

It doesn't support plant protein, or any supplement, "detoxing" or "cleansing" the body — there's no accepted clinical measurement of a detox to test against, and nothing has been shown to speed up what the liver and kidneys already do continuously as ordinary function.

What the trials found

A 2015 critical review in the Journal of Human Nutrition and Dietetics set out to evaluate whether commercial detox diets are necessary, effective and safe. It found a large and growing detox industry but very little clinical evidence behind it: a small number of methodologically weak, small-sample studies suggested some commercial detox products changed liver detoxification markers or helped eliminate certain pollutants, and most of the stronger evidence for specific detoxifying foods (coriander, nori, a fat substitute called olestra) came from animal studies, not humans. The authors reported that, to their knowledge, no randomized controlled trial had tested a commercial detox diet's effectiveness in people at all — for any outcome, including protein-based products.

No trial anywhere isolates a plant protein powder specifically and tests it as a "cleanse" or "detox" product. The liver and kidneys process and clear substances from the blood continuously as part of normal, everyday function, whether or not someone is taking a protein supplement; nothing in the research above shows any product accelerating that process.

Questions people ask

Does plant protein detox your body?

No trial has tested that. "Detox" isn't a defined, measurable outcome in the research on plant protein, or on detox products generally.

Can protein powder help you cleanse?

Not that any clinical trial has shown. A 2015 review found no randomized trials of commercial detox or cleanse products in humans at all.

Is plant protein good for a liver cleanse?

The liver processes substances continuously as normal function; that doesn't require, or benefit from, a "cleanse" period, and no trial has tested plant protein for liver-detox outcomes specifically.

Is a "detox" or "cleanse" product safe to use?

The 2015 review above wasn't primarily a safety study, but it found the evidence behind these products thin enough that safety claims made for them are also largely untested. A high-protein shake itself isn't the concern for most healthy adults — the untested part is the "detox" or "cleanse" framing layered on top of it.

When to talk to a doctor

Concern about liver or kidney function, or wanting to make a significant diet change, is worth raising with a doctor, who can order actual liver and kidney function tests rather than relying on a "cleanse" framework. Plant protein is not a treatment or a cleanse for any organ.

Related reading: what the research shows about plant protein, plant protein side effects, and who should not take plant protein.