What is the best plant protein in the UK by Index and £ per 25g?

This page is UK-only. Figures are in GBP. Product links use /uk/ URLs. On WheyIndex, “best” starts with the Quality Index, then cost per 25g of protein. Tub sticker price alone ranks packaging, not protein.

Three live UK pea powders clear the Excellent Index band (≥80) with verified 0.0g sugar per 25g protein on today’s product pages.

Live UK plant anchors

Locked from product pages on 20 Sep 2026 (CEST):

Product	Index	£/25g	Sugar /25g
bulk Pea Protein Isolate Chocolate Mint	100/100	£0.38	0.0g
LAMBERTS Concentrated Pea Protein	100/100	£0.97	0.0g
PULSIN Pea Protein Natural & Unflavoured	97/100	£0.94	0.0g

bulk Pea Protein Isolate Chocolate Mint

Field	Live value
Quality Index	100/100 Excellent
Cost per 25g protein	£0.38
Sugar per 25g protein	0.0g
Formulation checks	6 of 6

Index leads at a full 100. Sugar is verified 0.0g per 25g. Then the money check: £0.38 per 25g is the lowest of this trio. Pack on the page: 1000 g, 24g protein per 30g serving, listed at £11.99.

LAMBERTS Concentrated Pea Protein

Field	Live value
Quality Index	100/100 Excellent
Cost per 25g protein	£0.97
Sugar per 25g protein	0.0g
Formulation checks	6 of 6

Same Index band as bulk (100). Same verified 0.0g sugar. Cost per 25g is higher at £0.97 on this unflavoured 360 g pack. Flavour preference and pack size still matter at checkout; cite the URL you mean.

PULSIN Pea Protein Natural & Unflavoured

Field	Live value
Quality Index	97/100 Excellent
Cost per 25g protein	£0.94
Sugar per 25g protein	0.0g
Formulation checks	6 of 6

Index 97 still clears Excellent. Sugar matches the 0.0g band. Cost per 25g sits at £0.94, close to LAMBERTS on protein cost and below bulk’s Index by three points. Serving on the page is 8g protein per 10g scoop (1000 g pack).

Index first, then pounds

Every scored product gets an Index from 0 to 100:

• 60% formulation: six ingredient checks (artificial colors, flavors, preservatives, sweeteners, fillers/thickeners, high-fructose corn syrup)
• 30% sugar: scored from sugar grams per 25g of protein
• 10% value: lower cost per 25g inside the same UK sales market (GBP) scores higher

Full detail: How the Index works (UK). Scores are a comparison model, not a lab safety assay, and they are not for sale.

Cost per 25g is the supporting unit:

Cost per 25g = (cost per serving ÷ protein grams per serving) × 25

Among powders in the same high Index band, prefer the clearer ingredients fit for you and the lower £/25g. Flavour (mint chocolate vs unflavoured) and concentrate vs isolate style stay personal.

Browse on UK Compare

Prices move. Open UK Compare, put your plant finalists on one screen, and read Index, £/25g, and sugar per 25g together. Start from the UK home if you are picking a category first. Always confirm today’s numbers on the product page before you treat a listing as a winner.

Before you buy

Look up the powder on wheyindex.com/uk. Read today’s Index first, then £/25g and sugar per 25g on the product page. Refresh if the listing has moved, then decide.