M&S SALT AND PEPPER LENTIL CRACKERS

150g, £1.70. Per 100g: Calories, 410; saturated fat, 3.8g; sugar, 5g; salt, 1.23g; fibre, 3.3g

EXPERT VERDICT: Gluten-free these contain lentil, maize, pea and rice flours as well as potato starch, milk and whey proteins — and some added sugar.

Like most biscuits, these offer a substantial amount of carbohydrate — 66g per 100g — but the effect on blood sugars is reduced by protein from the pulse flours and dairy proteins. A sixth of a pack gives you 4.6g protein — about the same as a small boiled egg. Lentils are a good source of folate, important for the manufacture of red blood cells.

TASTE: Very crisp with a strong herby aftertaste. 6/10