For coeliac shopping, choose a bar explicitly labelled gluten-free, then compare protein per bar and the allergens on the exact pack. Nature Valley UK lists around 10g protein per 40g bar for its gluten-free Protein Peanut & Chocolate and Protein Salted Caramel Nut products, which contain peanuts, soy and milk. TREK Original Oat provides 10g per 50g gluten-free oat bar and offers a vegan alternative if you tolerate gluten-free oats; Coeliac UK notes that a small number of people with coeliac disease remain sensitive to them.
The choice changes with the protein serving you want, the ingredients you can eat and whether gluten-free oats suit you.
If you need an explicitly gluten-free bar for a commute or between-meal snack, compare the serving shown on the pack rather than the word “protein” on the front. Nature Valley UK lists around 10g protein per 40g bar for its Protein Peanut & Chocolate product; its peanuts, soy and milk also need to suit you.
A flapjack may appeal if you prefer oats and want a vegan option. TREK lists 10g plant protein for its gluten-free Original Oat bar. Coeliac UK distinguishes gluten-free oats from standard oats and notes that a small number of people with coeliac disease remain sensitive to gluten-free oats.
If vegan or dairy-free suitability matters alongside gluten-free status, compare those declarations on the exact product. Holland & Barrett lists nākd. Protein Caramel as vegan, dairy-free and gluten-free, with 7.7g protein per 45g bar.
Check the exact bar’s gluten-free declaration first. Then compare its per-bar nutrition and ingredients with the way you plan to use it.
| Priority | What to check | Your needs |
|---|---|---|
| Gluten-free status | Look for “gluten-free” on the exact flavour and current pack. Coeliac UK states that foods labelled gluten-free contain no more than 20 parts per million of gluten; a wheat-free ingredient list is not the same declaration. | I need the particular bar I buy to be labelled gluten-free, not just another product from the same brand. |
| Protein serving | Compare grams of protein per individual bar and note its weight. Nature Valley UK lists 10.4g per 40g Salted Caramel Nut bar; TREK lists 10g for its 50g Original Oat bar. Other nutrition figures should also be compared on a consistent per-bar or per-100g basis. | For a protein-led choice, I want to know what one bar provides, not assume that similarly named bars have the same serving. |
| Oat tolerance | For a flapjack, confirm that the exact product is labelled gluten-free and check whether it contains oats. Coeliac UK says standard oats may be contaminated with wheat, barley or rye, and some people remain sensitive even to gluten-free oats. | An oat-based bar appeals to me only if gluten-free oats suit me. |
| Other ingredients | Read the full ingredient and allergen statement, including any “may contain” wording. Nature Valley’s named protein bars contain peanuts, soy and milk; TREK says Original Oat may contain peanuts, nuts and milk. | I need to check nut, soy or milk requirements separately from the gluten-free label. |
Coeliac UK says standard oats can be contaminated with wheat, barley or rye. Descriptions such as “pure oats” do not establish that an oat bar is gluten-free.
Choose an oat bar only when the exact product is labelled gluten-free. If gluten-free oats do not suit you, consider a non-oat bar instead.
Nature Valley UK identifies Protein Peanut & Chocolate and Protein Salted Caramel Nut as the gluten-free products in its range; that statement does not cover its other bars.
Check the flavour and the label on the pack you receive, particularly if its packaging has changed.
The named bars have different weights and protein amounts: TREK lists 10g for Original Oat, while Eat Natural lists 8g per 40g bar for its researched peanut, almond and cocoa product.
Compare protein per bar before deciding, then read the other nutrition information using the same serving basis.
A gluten-free bar may still contain ingredients you need to avoid. Nature Valley’s named protein bars contain peanuts, soy and milk; Eat Natural’s researched bar contains peanuts and almonds.
Read the exact pack’s ingredients and precautionary allergen statement as a separate check.
These distinctions concern the named products, not every snack bar made by each brand.
Nature Valley UK identifies Protein Peanut & Chocolate and Protein Salted Caramel Nut as gluten-free products in its range.
TREK describes Original Oat as a vegan, gluten-free oat bar with 10g plant protein per 50g bar.
Eat Natural lists its researched peanut, almond and cocoa protein bar as gluten-free, with 8g protein per 40g bar.
Holland & Barrett lists nākd. Protein Caramel as vegan, dairy-free and gluten-free.
These options include two named Nature Valley protein bars and two TREK flapjack flavours. For coeliac shopping, confirm the gluten-free declaration and allergens on the exact pack; nutrition information for TREK Original Oat should not be assumed to apply to the Salted Caramel or Cocoa Oat flavours.
No image available
For a protein-led, gluten-free choice when peanuts, soy and milk suit you. Nature Valley UK identifies this flavour as gluten-free and lists around 10g protein per 40g bar; check the current pack’s allergen statement.
No image available
Another named gluten-free Nature Valley option for shoppers who can eat peanuts, soy and milk. Nature Valley UK lists 10.4g protein and 4.3g fibre per 40g bar; confirm the ingredients on the pack you receive.
No image available
If you prefer a flapjack, check this Salted Caramel flavour’s own gluten-free declaration, protein-per-bar figure and allergen statement. The pack contains three 50g bars; oat suitability depends on your individual tolerance.
No image available
For shoppers considering an oat-based snack, check that this Cocoa Oat flavour is labelled gluten-free and that its ingredients suit you. The pack contains three 50g bars; compare its own protein-per-bar figure rather than using the figure for TREK Original Oat.
Look for a gluten-free declaration on the exact product. Coeliac UK states that foods labelled gluten-free contain no more than 20 parts per million of gluten; also read the current pack’s ingredients and allergens rather than assuming every bar from a brand has the same status.
Choose an oat flapjack only if the exact product is labelled gluten-free and gluten-free oats suit you. Coeliac UK says standard oats may be contaminated with wheat, barley or rye, and a small number of people with coeliac disease remain sensitive to gluten-free oats. If oats cause ongoing symptoms or you are unsure about introducing them, ask your healthcare professional.
No. Nature Valley UK identifies Protein Peanut & Chocolate and Protein Salted Caramel Nut as the gluten-free products in its range. Confirm the exact flavour and current pack instead of extending that statement to other Nature Valley bars.
Start with grams of protein per individual bar and note the bar’s weight. Nature Valley UK lists 10.4g per 40g Salted Caramel Nut bar, while TREK lists 10g per 50g Original Oat bar; ingredients, allergens and oat tolerance can still determine which of those products suits you.