ASA Creatine Ruling: TikTok Shop Affiliate Guidance for UK Brands

On 14 October 2026 the ASA upheld a complaint against a UK creatine brand over a paid-for Facebook ad. The upheld wording went beyond the only authorised creatine claims on the Great Britain nutrition and health claims (GB NHC) Register. That ruling was not about TikTok Shop. Separately, earlier ASA rulings already show that brands remain responsible under the CAP Code when affiliates create the creative — including TikTok posts with a Shop link and a “Commission paid” label. This guide covers what the ASA actually upheld, the authorised creatine claims, affiliate liability language, how CAP/ASA and TikTok Shop Seller University stack, and a pre-Black Friday claim freeze checklist before affiliates go live.

Channel first: this was a Facebook paid ad, seen on 23 May 2026. It was not a TikTok Shop ruling. The claim-wording lesson still transfers under the CAP Code to any marketing communication that makes the same kind of health claim — including creator and affiliate content that drives TikTok Shop sales.

According to the ASA ruling on that Facebook creatine ad (Upheld, 14 October 2026), the ad included:

The ASA treated those claims and images as specific health claims: consumers would understand that taking the product would improve muscle strength, build muscle and change body shape.

The only authorised creatine claims the ASA cited from the GB NHC Register were:

1. “Daily creatine consumption can enhance the effect of resistance training on muscle strength in adults over the age of 55”

2. “Creatine increases physical performance in successive bursts of short-term, high intensity exercise”

“Clinically backed to support muscle strength” did not have the same meaning for consumers as either authorised claim. It referred broadly to muscle strength without the over-55 limitation or the successive short-term, high-intensity exercise context. The pancake/peach line, protein comparison, “Muscle Definition” and before-and-after illustration went further still — building muscle, changing body shape and definition — which the authorised claims do not support.

Breach: CAP Code (Edition 12) rules 15.1, 15.1.1 and 15.7 (Food, food supplements and associated health or nutrition claims). The ad must not appear in that form; future claims must be authorised on the GB NHC Register and meet the conditions of use.

Only authorised claims on the applicable register may be used, or claims that would have the same meaning for consumers (CAP Code Section 15, rules 15.1 and 15.1.1). Nutrition and health claims for food supplements must meet those requirements and the conditions of use (rule 15.7).

The GB NHC Register (Department of Health and Social Care) is the register for Great Britain. Do not invent “safer” paraphrases for live ads — check the register and take legal advice or CAP Copy Advice for a live claim pack.

Operator point: there is no authorised general “supports muscle strength” claim for all adults. The over-55 claim is narrow. The performance claim is about successive short-term high-intensity bursts — not body recomposition, “muscle definition”, or protein comparisons. CAP allows limited “same meaning” flexibility; the October 2026 Facebook creatine ruling shows the ASA still fails adaptations that strip the authorised limitations or exaggerate the effect.

CAP News (24 July 2025) restates the same baseline for influencers and food ads: only authorised health claims (or same meaning), and no claims that a food prevents, treats or cures human disease (Influencers and health professionals: cut the waffle…).

ASA’s sports supplements advice makes the same point for muscle/weight-style language: claims that relate to an effect on health are health claims under Section 15 and must track the register (Food: Sports supplements and associated products).

On 15 July 2026 the ASA upheld a complaint against a UK wellness brand. The product context was GLP-1-style medicinal presentation and social-responsibility issues — not creatine, and not a TikTok Shop case. The liability lesson is the point for this article.

The advertiser said the post was organic and unpaid, created and published by a third-party affiliate, and that the creative had not been briefed, commissioned or approved by them in advance. The ruling records that:

they accepted that they remained responsible for it under the CAP Code and should have had tighter monitoring of affiliate content.

That matches ASA’s standing affiliate advice: both the business and the affiliate marketer are responsible under the Code, even when the ads were created solely by the affiliate with no input from the brand. Allowing affiliates free rein over content does not excuse the brand (Online Affiliate Marketing).

ASA remit guidance for social media says the same for affiliate marketing: when assessing content created by affiliates, the ASA typically considers the brand at least jointly responsible — regardless of whether the brand was aware or had control over the specific content (Remit: Social media). Affiliate and influencer marketing must also be obviously identifiable as advertising; see the Influencers’ guide.

Ops translation: “The affiliate posted it without our approval” is not a CAP defence. If you cannot monitor and correct affiliate creative, you are running a named-brand risk every time a commission post goes live.

Do not merge this with the October 2026 Facebook creatine ruling or the July 2026 affiliate-liability ruling (GLP-1 / social responsibility). A May 2024 ASA case is the clearest TikTok Shop–native affiliate precedent in the rulings set for this brief.

On 15 May 2024 the ASA upheld a complaint against a UK hangover-recovery brand. Facts from the ruling:

The advertiser said they removed the video and removed the product from affiliate marketing on TikTok Shop because they were unable to control the claims made by affiliates. They said they were unaware of the post until notified because it was an affiliate post, not their own page.

Framing for operators: a TikTok post with a Shop purchase link and a commission label sits inside CAP remit. Platform commission mechanics do not move the ad outside ASA. Hashtags counted. Brand and product names that imply a prohibited disease claim can fail on their own.

Related CAP News on hangover cures: Wishful drinking — hangover cures and the Code.

CAP/ASA and TikTok Shop rules are separate layers. Seller University does not replace the CAP Code. Passing one stack does not prove the other.

Seller University pages to keep in the claim pack (UK):

1. Selling Supplements on TikTok Shop (19/09/2025) — prohibited supplement types (including weight-loss of any kind, sexual enhancement, detox/cleansing, medicinal claims, consumable CBD/hemp, and others listed on the page). Health claims only if authorised by the UK or EU authority, the product meets the conditions, and the “wording is used exactly as approved — no modification or paraphrasing.” Points sellers to the UK NHC Register and the EU Register.

2. Prohibited Medicines, Medical Devices & Health Claims (07/10/2025) — no cure/heal/treat/prevent/alleviate disease claims across title, description, images and videos.

3. Weight Loss Content (27/02/2026) — no weight-loss product promotion; implicit examples such as “Feel full for longer” and “Helps control cravings” listed as non-compliant; before/after body visuals banned; enforcement can include content removal, commission freeze, and seller/creator suspension. Fitness/wellness supplements may be allowed if not marketed as weight loss.

Layer difference that bites operators: CAP allows limited “same meaning” rewording of authorised claims — and the October 2026 Facebook creatine ruling still failed that test. TikTok Seller University’s supplements guidance says use authorised wording exactly, with no modification or paraphrasing. Your claim pack needs both stacks locked: register-accurate CAP wording and platform-exact lines for Shop content. Do not invent which body “wins” in a conflict — design the pack so both are satisfied.

Product eligibility, listing restrictions and how Open vs Target Collaboration work are covered in our TikTok Shop supplements guide — not here.

Peak affiliate volume before Black Friday means more creators, more LIVE talk-tracks and more unapproved claim drift. An ASA ruling names the brand. Use this as an ops sequence — not as invented enforcement statistics.

For how the affiliate programme itself works end-to-end, see TikTok Shop Affiliate Programme. This piece does not re-teach Open vs Target Collaboration, eligibility lists or 90-day launch plans — use those guides for that.

No. The 14 October 2026 ruling concerned a paid-for Facebook ad. The lesson is claim wording against the GB NHC Register under CAP Section 15. TikTok Shop content is still covered by CAP when it is a marketing communication; the May 2024 case is the TTS-native parallel, not the Facebook creatine case.

Yes under the CAP Code, as ASA affiliate advice and the July 2026 advertiser’s recorded acceptance of responsibility both show. The brand is typically treated as at least jointly responsible even if it did not brief or approve the post in advance.

As set out on the GB NHC Register and cited in the October 2026 Facebook creatine ruling: (1) creatine increases physical performance in successive bursts of short-term, high intensity exercise (with the 3 g / high-intensity-adult conditions); (2) daily creatine can enhance the effect of resistance training on muscle strength in adults over 55 (with the 3 g + resistance-training conditions). There is no general authorised “supports muscle strength” claim for all adults. Always check the live register.

No. Seller University is an additional platform layer. CAP/ASA still apply to marketing communications, including affiliate posts with Shop links and commission labels.

New claim language, unapproved benefit improvisation on LIVE, and any affiliate creative that is not mapped to the claim pack. Re-audit recent affiliate posts and set a named monitoring owner before peak volume.

The ASA did not “hit TikTok Shop creatine” on 14 October 2026. It upheld a Facebook creatine ad for claims that did not match the GB NHC Register. An earlier affiliate ruling already showed that affiliate-created posts still name the brand. The May 2024 TTS case showed that TikTok Shop links and “Commission paid” labels sit inside CAP remit. Before affiliates scale into peak, lock the claim pack, the brief, the LIVE talk-track and the takedown owner — against both CAP/ASA and Seller University.

If you want a claims and affiliate creative audit before peak — claim pack, creator brief, LIVE talk-track and monitoring SLA — talk to KLIQMGMT. We are a UK TikTok Shop partner agency working with supplement and wellness brands on creator and affiliate operations.

ASA rulings and TikTok's rules change often, so check the live pages before you brief creators.

• ASA ruling: Facebook creatine ad · Ruling (14 Oct 2026)

• ASA ruling: affiliate-created post · Ruling (15 Jul 2026)

• ASA ruling: TikTok Shop affiliate post · Ruling (15 May 2024)

• CAP Code Section 15 · Guidance

• Online Affiliate Marketing · Guidance

• Remit: Social Media · Guidance

• Influencers' Guide · Guidance

• Sports Supplements · Guidance

• Health Claims in Food Ads · Article (24 Jul 2025)

• Wishful Drinking: Hangover Cures and the Code · Article

• GB Nutrition and Health Claims Register · Guidance

• Selling Supplements on TikTok Shop · Article (19 Sep 2025)

• Prohibited Medicines, Medical Devices & Health Claims · Article (7 Oct 2025)

• Weight Loss Content · Article (27 Feb 2026)

• TikTok Shop for Supplement Brands · Article

• TikTok Shop Affiliate Programme · Article