Who is choosing the drink?

Parents buying half-term snacks

A zero-sugar energy drink is still an energy drink. For a child’s snack, choose a non-energy-drink option and check its label for caffeine and ingredients. The Department of Health and Social Care has linked excessive caffeine consumption in some children with changes to anxiety and sleep.

Adults choosing a sugar-free energy drink

If you want an energy drink without sugar, compare the caffeine in the entire can. Red Bull states 80 mg in a 250 ml Sugarfree can; Monster Energy UK states 150 mg in a 500 ml Monster Ultra can.

Shoppers choosing a flavoured soft drink

If the drink is for a family snack rather than adult energy-drink use, a zero-sugar soft drink is a different category to consider. Lucozade describes its Zero range as sparkling, zero-sugar refreshment; check the exact drink’s label for caffeine, sweeteners and other ingredients.

What should you check?

A child’s snack drink

Choose this route: Pick a non-energy-drink option when the drink is for a child.

Check: A zero-sugar soft drink still needs an individual label check for caffeine and ingredients.

An adult energy drink

Choose this route: Compare sugar-free energy drinks only when the intended drinker is an adult deliberately choosing one.

Trade-off: Removing sugar does not remove caffeine, and different can sizes contain different totals.

Priority What to check Your needs
Child suitability Check whether the product is an energy drink and read its caffeine information and age warning. Do not use a sugar claim as a child-suitability test. I’m choosing a drink for a child’s snack, not an adult energy drink.
Sugar and caffeine Read the exact pack’s sugar declaration, caffeine information and ingredients. A zero-sugar claim does not mean caffeine-free. I want to understand what the sugar claim tells me without overlooking caffeine or sweeteners.
Whole-can caffeine For an adult energy drink, compare milligrams in the full can alongside can size. Red Bull states 80 mg per 250 ml Sugarfree can; Monster Energy UK states 150 mg per 500 ml Monster Ultra can. If I drink a whole can, I want to compare the amount in that can rather than relying on matching zero-sugar wording.
Soft-drink alternative Choose from non-energy-drink products, then check the particular flavour’s caffeine declaration and ingredient list. For a family snack, I’m looking for a flavoured drink without deliberately choosing an energy drink.

Common buying mistakes

  • Reading “zero sugar” as “suitable for children”

    Zero-sugar energy drinks can still contain caffeine. Red Bull states 80 mg per 250 ml Sugarfree can, and Monster Energy UK states 150 mg per 500 ml Monster Ultra can.

    For a child’s half-term snack, choose a non-energy-drink option rather than deciding from the sugar claim alone.

  • Overlooking the amount in the whole can

    Can size matters when comparing caffeine totals: the cited 250 ml Red Bull Sugarfree and 500 ml Monster Ultra cans contain different amounts.

    Check the caffeine declaration and can size on the exact pack, then compare the amount you intend to drink.

  • Treating a future England rule as a current UK-wide ban

    The UK government has announced an under-16 sales ban for high-caffeine energy drinks in England from April 2027. That announcement does not establish the same rule across every UK nation in October 2026.

    For a purchase now, check the retailer’s current age policy and the product label. Do not use the planned restriction as a reason to choose an energy drink for a child.

Relevant drink ranges

Red Bull

Red Bull Sugarfree is a smaller-can energy-drink example for adults comparing sugar and caffeine.

  • Red Bull states that a 250 ml Sugarfree can contains no sugars and 80 mg caffeine.
  • It remains a caffeinated energy drink, not a child-snack alternative.

Monster

Monster Ultra provides a larger-can, zero-sugar energy-drink comparison for adults.

  • Monster Energy UK states 0 g sugar and 150 mg caffeine per 500 ml Monster Ultra can.
  • Compare caffeine per whole can rather than assuming its zero-sugar claim means it is caffeine-free.

Lucozade

Lucozade Zero is presented by Lucozade as a zero-sugar sparkling soft-drink range rather than an energy drink.

  • The range includes flavoured zero-sugar drinks.
  • Check the individual product label for caffeine and ingredients before choosing it for the intended drinker.

Relentless

Relentless Guava illustrates why warnings on an energy drink matter independently of a shopper’s interest in sugar.

  • Relentless publishes a product-specific warning on its Guava drink.
  • Relentless says Guava is not recommended for children, people sensitive to caffeine, or pregnant or nursing women. Check sugar information for the exact variety separately.

Joybuy drink options

These options include energy drinks for adults comparing zero-sugar cans and a zero-sugar soft drink to consider for a family snack. Check the soft drink’s label before relying on it as a caffeine-free choice.

Red Bull Sugarfree Energy Drink, four 250 ml cans

Red Bull Sugarfree Energy Drink, 4 × 250 ml

For an adult comparing smaller sugar-free energy-drink cans. Red Bull states 80 mg caffeine per 250 ml Sugarfree can; this is not a child-snack drink.

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Monster Energy Ultra Zero Sugar 500 ml cans

Monster Energy Ultra Zero Sugar, 500 ml cans

For an adult comparing larger zero-sugar energy-drink cans. Monster Energy UK states 150 mg caffeine per 500 ml Monster Ultra can. Confirm the number of cans in this multipack before ordering.

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Monster Energy Green Zero Sugar, 12 cans

Monster Energy Green Zero Sugar, 12 cans

Another adult zero-sugar energy-drink option in a 12-can pack. Check the exact pack for can size, caffeine per can and warnings; it is not the soft-drink route for a child’s snack.

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7UP Zero, 24 cans of 330 ml

7UP Zero, 24 × 330 ml

A soft-drink option rather than an energy drink for a family snack. Check the exact pack’s caffeine declaration, sweeteners and ingredients before choosing it for a child.

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Questions about sugar and caffeine

Is a no-added-sugar energy drink a suitable half-term snack for a child?

Choose a non-energy-drink alternative for a child’s snack. A sugar claim does not remove caffeine, and the Department of Health and Social Care has linked excessive caffeine consumption in some children with anxiety and sleep effects.

Does zero sugar mean an energy drink has no caffeine?

No. Red Bull states that Sugarfree contains 80 mg caffeine per 250 ml can, while Monster Energy UK states that its zero-sugar Monster Ultra contains 150 mg per 500 ml can.

What should an adult compare between sugar-free energy drinks?

Compare the sugar declaration, ingredients, can size and caffeine in the whole can. For example, Red Bull states 80 mg per 250 ml Sugarfree can and Monster Energy UK states 150 mg per 500 ml Monster Ultra can; check the exact variant and pack you intend to buy.

Is the under-16 energy-drink sales ban already in force across the UK?

No UK-wide ban is established by the England announcement. The UK government announced a ban on sales of high-caffeine energy drinks to under-16s in England from April 2027; for a purchase in October 2026, check the retailer’s current policy rather than treating that future England measure as a current rule everywhere.

Can I choose a zero-sugar soft drink instead of an energy drink?

Yes, a zero-sugar soft drink is a different option to consider for a family snack. Lucozade presents its Zero range as sparkling soft drinks; check the individual drink’s caffeine declaration and ingredients before deciding whether it suits the intended drinker.