Why Lentils are one of the most sustainable proteins

August 25, 2026
by S R

Wholefoods & Sustainability

Why Lentils Are One of the Most Sustainable Proteins You Can Buy

3 min read Hover the cards below

Lentils rarely get billed as an environmental hero, but the numbers make a genuinely strong case. Long before "sustainable protein" was a marketing phrase, lentils were already doing the job quietly: little water, almost no synthetic fertiliser, and a knack for leaving soil better than they found it.

Why lentils pull this off

Hover or tap each card to see what makes lentils such an efficient crop.

They Make Their Own Fertiliser

nitrogen fixing

Lentils partner with soil bacteria to pull nitrogen from the air and fix it in the ground, cutting the need for synthetic fertiliser almost entirely.

Barely Any Water Needed

mostly rain-fed

Most lentil crops are rain-fed rather than irrigated, which is a large part of why their water footprint runs so far below meat and dairy.

A Genuinely Low Carbon Footprint

vs. red meat

One kilogram of legumes produces roughly 0.5kg of CO2 equivalent, next to about 9.5kg for the same weight of beef.

They Leave the Soil Better

crop rotation

Crops grown after lentils in a rotation tend to need less fertiliser and produce higher yields, thanks to the nitrogen and organic matter left behind.

By the numbers

Producing a kilogram of beef takes roughly 43 times the water of producing a kilogram of pulses, according to figures compiled by the FAO's International Year of Pulses.

An easy swap with a real impact

None of this requires a full diet overhaul. Swapping even a portion of the meat in a weekly meal plan for lentils measurably lowers its footprint, and the crop itself is doing more good in the ground than almost anything else you could grow there instead.

Maven Wholefoods stocks the everyday varieties worth keeping on hand. Organic Green Lentils hold their shape for salads and sides, Organic Brown Lentils are the reliable everyday choice for soups and stews, and Organic Red Split Lentils cook down fastest for curries and dals.