Snacking: Common Myths and What Guidelines Say
Snacking: what people commonly get wrong, set against what published UK guidance says.
Snacks are where a large share of free sugar and saturated fat enters the UK diet, and also where fibre and protein gaps are most easily filled.
Key takeaways
- Free sugar limit, adults: 30g a day
- High sugar on a label: more than 22.5g per 100g
- Most useful single change: Choose snacks with protein or fibre, which actually fill you.
- Commonest mistake: Grazing continuously rather than eating defined snacks.
- See a doctor if any of the signs under "When to speak to a doctor" below apply to you.
What the guidance actually says
The numbers first, since the corrections only mean something against them.
| Measure | Figure |
|---|---|
| Free sugar limit, adults | 30g a day |
| High sugar on a label | more than 22.5g per 100g |
| Useful snack structure | protein or fibre, ideally both |
| A 30g portion of nuts | about 5g protein and 2-3g fibre |
| Change4Life guidance for children | no more than two 100-calorie snacks a day |
Where people go wrong
These are widely believed and not supported by the guidance above.
- Grazing continuously rather than eating defined snacks
- Drinking calories, which satisfy less than the same energy eaten
- Cereal bars assumed to be healthy without checking the label
What to do instead
- Choose snacks with protein or fibre, which actually fill you
- Keep fruit, nuts and yoghurt visible and biscuits out of sight
- Decide on the snack before you are hungry
- Read the per-100g column when comparing packets
The part that is genuinely uncertain
Guidance changes, and it changes because evidence does. The figures above reflect current UK guidance from the bodies named at the foot of this page; where those bodies revise their position, theirs is the account to follow rather than this one.
Where to go next
- Understanding Snacking: A Plain-English Explainer
- Snacking: What to Do, in Order
- Snacking — the reference entry
- The Evidence on Vegetarian and Vegan Diets, Without the Hype
- What the Guidance Really Says About Cooking for One
When to speak to a doctor
See a GP if you are constantly hungry alongside excessive thirst, frequent urination or unexplained weight loss, which can indicate diabetes. If eating feels out of control or is followed by compensatory behaviour, contact your GP or the Beat helpline on 0808 801 0677.
Where this comes from
How this page was put together
Every figure, recommendation and warning above is taken from the guidance named in Where this comes from. Nothing on this page is inferred, summarised or generalised beyond what those bodies publish: where they give a number, it is their number, and where they are silent, so are we. Pages are rebuilt whenever the underlying record changes. Sign-off by a named clinician, where it has happened, is shown at the top of the page along with the date.
Medical disclaimer
This article is general information, not medical advice. It cannot account for your own history, medication or circumstances. Always speak to a GP, pharmacist or another qualified health professional before making changes that affect your treatment, and never delay seeking medical advice because of something you have read here. In an emergency, call 999.
Spotted something wrong? Report an error on this page. We correct on the page and say what changed.
