High-Protein Bar Ad Copy (UK): Recovery and "Best-Tasting" Claims Fail, Protein and "Natural" Need Qualifying

Interpretation: the copy is a non-broadcast ad for a 60g high-protein snack bar, judged against the CAP Code (Sections 3 and 15) and the GB Nutrition and Health Claims (NHC) register. "100% natural" and "guilt-free" are treated as two separate claims, so there are five rows. Your evidence (lab result of 20.4g protein per 60g bar; internal taste test, n=120, 68% preferred vs an unnamed leading brand) is weighed for adequacy. No ingredient list, kcal figure or recovery study was supplied, so none is assumed.

claim	claim type	applicable rule/source	evidence needed vs found	verdict	risk	missing disclosure	safer wording
"Packed with 20g protein"	nutrition / quantity claim	GB register conditions: "High protein" needs at least 20% of energy from protein; "Source of protein" at least 12%; ASA advice on food nutrition claims	needed: lab figure per stated serving, plus energy value to test the energy-% threshold if "high protein" is implied / found: [20.4g protein per 60g bar (lab analysis, advertiser-supplied)]; kcal per bar not found, so the 20% threshold is unchecked	needs qualification	medium	the serving basis ("per 60g bar")	"Contains 20g protein per 60g bar" (add "high protein" only once energy data shows at least 20% of energy from protein)
"to fuel your workout"	implied health / performance claim	CAP Code Section 15, rules 15.1 and 15.1.1; ASA advice on general health claims (rule 15.2)	needed: an authorised register claim matching the meaning / found: register entries for protein cover muscle mass growth and maintenance and normal bones (register); no authorised "fuel" or "energy for workouts" protein claim found in the strings I searched (my inference, not an exhaustive check)	needs qualification	medium	none available; the claim must be reworded to an authorised one	"Protein contributes to the growth and maintenance of muscle mass" (only if the food is at least a source of protein and the register conditions are met)
"Clinically proven to boost recovery"	health claim, efficacy	CAP Code 15.1 / 15.1.1; ASA ruling: Protein Revolution Ltd, 23 October 2019	needed: an authorised claim, used with its conditions / found: the only recovery claim I located is for carbohydrates, usable only with information on a 4 g per kg body weight intake within 4 hours, no later than 6 hours after intensive exercise; no protein recovery claim found among the register's protein entries; no recovery study supplied	prohibited	high	not fixable by disclosure; "clinically proven" is not part of any authorised wording	remove; if the bar qualifies, use only an authorised wording with its conditions
"100% natural"	composition / "natural" claim	CAP Code 3.1 and 3.7; register: "natural" only as a prefix to a nutrition claim; ASA ruling: United Biscuits (UK) Ltd, 14 March 2018	needed: ingredient-by-ingredient processing records showing every ingredient meets consumer expectations of "natural" / found: no ingredient or processing data supplied	unsubstantiated	high	what "100%" covers (ingredients vs whole product)	"Made with [named ingredients]" or remove "100% natural" until each ingredient is verified
"guilt-free snacking"	implied general health / diet claim	ASA advice on general health claims; CAP Code Section 15	needed: if read as a health or well-being benefit, an accompanying authorised specific claim / found: none; no opened ASA ruling on "guilt-free" (not found)	needs qualification	medium	likely meaning to consumers is unverified (my inference)	remove, or "A high-protein snack" if the nutrition condition is met
"The UK's best-tasting protein bar"	comparative superlative, survey-based	CAP Code 3.1, 3.7, 3.33; ASA advice on comparisons based on awards or surveys; ASA ruling: Dr Oetker (UK) Ltd, 10 August 2016	needed: robust, representative survey against the market's leading bars, with participants able to compare / found: [internal test, n=120, 68% preferred vs one "leading brand" (advertiser-supplied)]; sampling, blinding and comparator details not supplied	unsubstantiated	high	basis of survey and comparator	"Preferred by 68% of 120 tasters vs [named brand]" only if the method is robust and disclosed; otherwise remove

Notes (rows not "supported")

20g protein: the ASA treats nutrition claims under the Regulation's conditions, so a "protein-rich" impression needs the energy-% test (ASA advice). The 20.4g lab figure supports the quantity only.
Fuel your workout: I found no authorised wording that matches. Protein entries cover muscle mass growth, muscle mass maintenance and normal bones. Inference: the ASA would likely read the claim as a specific or general health benefit.
Clinically proven recovery: in Protein Revolution, the ASA held that "clinically proven" did not appear in the authorised claim and that the health claims breached rules 15.1, 15.1.1 and 15.2. Same logic applies here by analogy. Even if a study exists, the claim must match an authorised wording.
100% natural: in United Biscuits the ASA found sunflower oil and fat-reduced cocoa powder would not be understood as natural because of solvent extraction and added potassium carbonate, and told the advertiser not to call ingredients natural unless they match consumer expectations. Protein bars often use processed protein isolates; whether yours do is not known (inference).
Guilt-free: no ruling opened; the general-health-claims advice says a general health claim is a reference to a general benefit of a food for overall good health or well-being (rule 15.2). Whether "guilt-free" falls within that is my inference.
Best-tasting: ASA advice says even subjective outcomes like taste may be treated as objective claims about a survey result, needing robust methodology. In Dr Oetker, the ASA objected that the survey did not list other pizzas or ask which had been tasted. Your 120-person test against one brand cannot show "UK's best" against the whole category.

Top three fixes

Delete "Clinically proven to boost recovery" (high risk, no matching authorised wording found).
Delete or substantiate "100% natural" with ingredient-level processing evidence.
Replace "UK's best-tasting" with a specific, disclosed survey result, or remove it.

Pre-clearance / lawyer review

Lawyer or regulatory review: "clinically proven", "100% natural" and "best-tasting" (all high risk).
Copy clearance: CAP Copy Advice is the usual route for pre-publication advice (not checked in this run).
Confirm the register: re-check current register wording before any health claim is used.

Do next

Get kcal per bar and compute protein's share of energy; decide between "contains 20g" and "high protein".
Collect ingredient specifications and processing steps for every ingredient before any "natural" wording returns.
Obtain the taste-test protocol (sampling, blinding, comparator set); if it cannot support a market-wide superlative, drop it.
Rewrite the workout and recovery lines to authorised register wording, or remove them.

Open items

Energy value per bar (unknown).
Ingredient list and processing (unknown).
Whether any recovery study exists and what it tested (unknown).
No opened ASA ruling on "guilt-free" (not found).
Whether the ad appears on TV or radio, which would bring in BCAP rules (not assessed).

Coverage note

A Lexology article did not load and was not used (unchecked). The register spreadsheet was decoded locally from the fetched file; its protein and recovery entries were searched by keyword, not read exhaustively. The Vodafone and Telefonica rulings appear only in ASA advice and were not opened as rulings.

Sources

This is a compliance screen, not legal advice; verdicts are recommendations for you to confirm.