Who is this choice for?

Shoppers comparing sugar claims

If you want a digestive for an occasional late snack, check the sugars figure per biscuit as well as the front-of-pack wording. Sugar-free and reduced-sugar describe different products.

People checking polyol ingredients

The checked Gullón Zero and Siro sugar-free digestives use polyol sweeteners. Both carry a warning that excessive consumption may have a laxative effect, which matters when deciding how many biscuits to eat.

People who snack just before sleep

If bedtime eating is a regular habit, the choice extends beyond biscuit labels. Lancashire and South Cumbria NHS Foundation Trust advises avoiding sugary foods and drinks at bedtime because saliva flow and its protective effects are lower.

What should you check?

Decide whether keeping the digestive-biscuit format matters most, then compare the sugar claim, serving size and ingredients on the pack you intend to buy.

Sugar-free digestive

Consider it when: Your priority is a sugar-free label and a lower declared sugars figure per stated biscuit serving.

Trade-off: The checked Gullón Zero and Siro products use polyol sweeteners and warn about a laxative effect from excessive consumption.

Reduced-sugar digestive

Consider it when: You want a wheatmeal digestive with less declared sugar than the checked McVitie’s Original, without requiring a sugar-free product.

Trade-off: McVitie’s The Light One still contains sugar and partially inverted sugar syrup.

Non-biscuit snack

Consider it when: Frequent snacking immediately before sleep is the bigger concern. Lancashire and South Cumbria NHS Foundation Trust advises avoiding sugary foods at bedtime and lists non-biscuit alternatives.

Priority What to check Your needs
Sugars Read the exact claim and “of which sugars” per biscuit or stated portion. ASDA lists less than 0.5g per 13.3g Gullón Zero biscuit; Sainsbury’s lists less than 0.1g per 13g Siro portion. McVitie’s lists 1.3g per The Light One biscuit, which is reduced-sugar rather than sugar-free. I want to reduce declared sugars without mistaking “reduced sugar” for “sugar-free”.
Sweeteners Read the ingredients and any warning. ASDA lists isomalt and maltitol in Gullón Zero; Sainsbury’s lists maltitols in Siro. Both listings warn that excessive consumption may have a laxative effect. If I plan to eat several biscuits, the sweeteners and pack warning matter as much as the sugar claim.
Energy and portion Compare kcal on the same serving basis as sugars, as well as per 100g. ASDA lists 57 kcal per 13.3g Gullón Zero biscuit and 430 kcal per 100g; Sainsbury’s lists 60 kcal per 13g Siro portion. I would rather decide how many biscuits to have than assume “sugar-free” means calorie-free.
Allergens Check the current ingredients and precautionary allergen statement. The checked Gullón Zero, Siro and McVitie’s The Light One products contain wheat; the product information also identifies possible milk or soya cross-contact for particular products. Where an allergen affects my choice, I need the declaration for the exact pack—not an assumption based on its sugar claim.
Bedtime routine Consider how often the snack is eaten just before sleep. Lancashire and South Cumbria NHS Foundation Trust advises avoiding sugary foods and drinks at bedtime and lists alternatives including plain yoghurt, toast and plain cheese. If I regularly snack before bed, I want to consider something other than a sweet biscuit too.

Common label mistakes

  • Reading “sugar-free” as “calorie-free”

    ASDA lists 430 kcal per 100g for Gullón Zero. Removing a sugar claim from the decision would miss the energy supplied by the biscuit as a whole.

    Compare kcal for the portion you expect to eat, alongside the sugars figure.

  • Overlooking polyol sweeteners

    The checked Gullón Zero and Siro biscuits contain polyols, and both listings warn that excessive consumption may have a laxative effect.

    Check the ingredients and warning before choosing a pack, particularly if you know these sweeteners do not suit you.

  • Treating “reduced sugar” as zero sugar

    McVitie’s lists 1.3g sugars per The Light One biscuit and includes sugar and partially inverted sugar syrup in its ingredients.

    Read the current pack’s claim, ingredients and “of which sugars” line together.

  • Applying school-food rules to a snack at home

    The Department for Education describes school-food standards for state-funded schools, while England’s Requirements for School Food Regulations 2014 concern food and drink provided to pupils. That scope does not establish a blanket HFSS classification for every digestive biscuit bought for home use.

    For school procurement, check the applicable rule and the particular product rather than using a home-snack label comparison as the deciding test.

Relevant brands and retailers

These references distinguish the checked product lines; a retailer listing is not a claim that every digestive it sells has the same recipe.

McVitie’s

Makes both Original Digestives and the reduced-sugar The Light One.

  • McVitie’s lists 1.3g sugars and 68 kcal per The Light One biscuit, compared with 2.2g sugars and 71 kcal per Original biscuit in the checked Tesco listing.
  • The Light One is not sugar-free: its ingredients include sugar and partially inverted sugar syrup.

Asda

The checked listings include Asda own-label Digestives and Gullón Zero Digestive Original.

  • ASDA Groceries lists less than 0.5g sugars per 13.3g Gullón Zero biscuit, compared with 2.5g per own-label Digestive biscuit.
  • Gullón Zero contains isomalt and maltitol and carries an excessive-consumption laxative-effect warning.

Sainsbury’s

Its checked listings include Siro Sugar Free Digestive Biscuits and McVitie’s reduced-sugar The Light One.

  • Sainsbury’s lists less than 0.1g sugars per 13g Siro portion.
  • Siro contains maltitols and carries an excessive-consumption laxative-effect warning; check the current pack for ingredients and nutrition.

Tesco

Its checked listing identifies McVitie’s The Light One as reduced-sugar wheatmeal biscuits.

  • The listing makes the reduced-sugar wording clear for this particular McVitie’s product.
  • Reduced-sugar does not mean sugar-free; check the pack’s sugars figure and ingredients.

M&S

Its checked Digestive Biscuits are a conventional, sugar-containing option.

  • Marks & Spencer lists 18.2g sugars per 100g, allowing a per-100g comparison with other packs.
  • The listed ingredients include sugar, demerara sugar and invert sugar syrup; this product is not a sugar-free route.

Digestives on Joybuy

This sugar-free digestive option keeps the biscuit format in the decision. Check its sweeteners, warning and portion information alongside the sugar-free wording.

Gullón Zero Sugar Free Original Digestives 400g pack

Gullón Zero Sugar Free Original Digestives 400g

A sugar-free digestive to consider when you want to keep the biscuit format while comparing declared sugars. The product information identifies isomalt and maltitol, warns that excessive consumption may have a laxative effect, and lists 430 kcal per 100g. It contains wheat and may contain milk and soya; check the current pack’s allergen statement.

View on Joybuy

Questions about late-night digestives

Is a reduced-sugar digestive sugar-free?

No. McVitie’s describes The Light One as reduced-sugar, lists 1.3g sugars per biscuit and includes sugar and partially inverted sugar syrup in its ingredients. Read the exact claim and the nutrition panel rather than treating the two terms as interchangeable.

Does sugar-free mean a digestive is calorie-free?

No. ASDA Groceries lists 430 kcal per 100g and 57 kcal per 13.3g biscuit for Gullón Zero. Check the energy figure for the portion you intend to eat as well as its sugars figure.

Why check the sweeteners in sugar-free digestives?

The checked Gullón Zero and Siro products use polyol sweeteners and both carry warnings that excessive consumption may have a laxative effect. Read the ingredients and pack warning if those sweeteners affect your choice.

What could I have instead of a biscuit just before bed?

Lancashire and South Cumbria NHS Foundation Trust advises avoiding sugary foods and drinks at bedtime because saliva flow and its protective effects are lower. Its suggested alternatives include plain yoghurt, toast, plain cheese, water and plain milk; choose according to the ingredients and dietary requirements relevant to you.