In brief
- Weight loss and detox advertising is currently one of the ASA's most closely policed areas, with enforcement activity likely to increase following the introduction of AI-powered ad monitoring.
- Unsupported efficacy claims, exaggerated weight loss results, misleading before-and-after imagery, unsubstantiated "detox" claims, and content that may harm or offend vulnerable audiences are all considered by the ASA to be advertising 'red flags'.
- Brand owners should take proactive measures to ensure compliance, rather than adopting a reactive stance to ASA enforcement (which can carry significant reputational and regulatory risk).
A number of rulings from the UK's Advertising Standards Authority (ASA) over the last year make clear that weight loss and detoxing claims is one of its most closely policed areas of advertising regulation. With a raft of recent rulings and published guidance from the Committee of Advertising Practice (CAP), it is important that brand owners in the beauty and wellness sector are aware of the pitfalls and how to advertise responsibly.
The ASA has published guidance reminding advertisers not to exaggerate when it comes to advertising diets and weight-loss plans. For brand owners, understanding precisely where the ASA draws the line is not only useful, but essential to avoiding enforcement action, and potential reputational damage from an adverse ruling.
This article follows our earlier discussions on body image portrayal in advertising, in which we noted that brands should take care not to exploit insecurities around body image or entice purchasers through misleading claims – a principle at the heart of the ASA's approach to weight loss and detoxing claims.
The ASA's 'red flags'
The ASA's recent guidance and rulings reveal a consistent set of concerns around this issue. Brand owners should be wary of the following 'red flags' to avoid potential enforcement action (which has increased tenfold since the introduction of the ASA's AI-powered ad monitoring system for infringing ads).
Unsupported claims
Efficacy claims and anticipated results for any weight-reduction product or method must always be supported by robust evidence. Testimonials alone are not sufficient to support efficacy claims, and brand owners must retain extensive material in support of any claims made in their advertising to ensure they cannot be regarded as false or misleading upon review.
Unsupported claims are perhaps the single most common reason for upheld rulings. A brand cannot simply assert that a product "melts fat" or "accelerates metabolism" without supporting robust scientific evidence. Customer reviews and before-and-after testimonials, while commercially compelling, do not meet the evidentiary threshold required by the ASA for health-related claims.
Exaggerated, unrealistic and irresponsible claims
Advertisers must be careful not to exaggerate how much weight users of their products or services are likely to lose, claim they can lose precise amounts of weight within a stated period, or from specific parts of the body, or that weight-loss will be permanent.
For example, the ASA has ruled against advertising claims such as "lose 10 lbs in 10 days" or "target belly fat". The body does not lose fat selectively in response to a product applied to one area, and the ASA's rulings reflect a sophisticated understanding of the underlying physiology of weight loss (a plea of ignorance is unlikely to be accepted by the ASA). While precise, time-bound claims relating to the impact of a particular health product on the body can be attention-grabbing from a marketing standpoint, brand owners should avoid this unless they have the evidence to back it up.
Stating or implying that people can lose an irresponsible amount of weight by using marketed products is also unacceptable. According to the ASA's recent guidance, a rate of weight loss greater than 2 lbs per week is unlikely to be compatible with good medical and nutritional practice for those who are overweight, but not obese, and should be avoided in any advertising material as promoting unhealthy weight loss habits.
This 2 lbs per week metric is a quantifiable benchmark that can easily be built into brand owners' internal sign-off processes ahead of marketing campaigns. Any campaign promising or implying weight loss that exceeds this rate is likely to be scrutinised by the ASA.
Obesity-related claims
This is a nuanced but important rule. Advertisers must not refer to obesity, or imply that they treat those with obesity by featuring people who appear to be obese in their advertising, unless they are offering a multi-component lifestyle weight management programme which meets all of the requirements set out in rule 13.2.1 of the CAP Code (the section of the CAP Code dealing with weight control and slimming).
Before-and-after imagery
Before-and-after images demonstrating weight-loss can be considered an implied efficacy claim, so advertisers must not exaggerate how much weight people are likely to lose, or indirectly promote an irresponsible amount or rate of loss.
The visual impact of a striking transformation image can be just as misleading as express written claims, and brand owners should apply the same standard of scrutiny to imagery as to copy.
Detoxing claims
While cutting out fatty and sugary foods may lead to weight-loss, advertisers must not imply that "detoxing" products such as wraps, patches or devices can aid weight or fat loss by flushing out toxins. Any suggestion that an accumulation of toxins can lead to adverse medical conditions, or that a marketed product can prevent these, should also be avoided.
"Detox" is one of the most frequently misused terms in beauty and wellness advertising. The scientific consensus – which the ASA applies in its rulings – is that there is no credible evidence that topical products, teas or patches meaningfully supplement the body's natural detoxification functions. Brand owners who use the word "detox" as little more than a lifestyle signifier should consider carefully how they use it.
Harm, offence and vulnerable audiences
Weight and body image are sensitive subjects, particularly in the age of social media, so advertisers must take care to ensure they do not include any claims or images likely to cause offence to consumers. Advertisements should also not appeal particularly to under-18s or to those for whom a diet may produce a potentially harmful body weight.
This issue connects directly to the broader body image concerns we explored in our previous articles. Increased scrutiny of body image within advertising is well established in the UK, and research has found that body image dissatisfaction in both adults and young people has been exacerbated through exposure to adverts for products aimed at changing a person's appearance (particularly weight-loss products). Advertisers in this space are contributing to a social environment that regulators are watching closely and should be mindful of the wider policy concerns in this area.
Practical advice
- Obtain and hold evidence before advertising. Do not rely on intuition, customer feedback or competitor precedent. Commission independent scientific reviews of any efficacy claims before including them in your advertising and retain that evidence so you can produce it if challenged.
- Audit your product names and straplines. Efficacy claims do not only appear in the main text of an ad. Unsupported efficacy claims in product names are equally problematic. A product called "Fat Flush Drops" or "ToxOut Detox Wrap" is making an implicit claim that will require substantiation through evidence.
- Scrutinise imagery equally to written copy. Before-and-after photographs, imagery of particular body types and visual representations of product efficacy are all subject to the same rules as written claims. Establish a clear internal review process that covers creative assets as well as copy.
- Do not use "detox" as a lifestyle word. The term carries regulatory meaning that many brand owners underestimate. If you use it, you must be able to substantiate whatever mechanism of action it implies.
- Set internal benchmarks for rate of weight loss. The two-pounds-per-week threshold is a concrete, actionable standard. Any claim – express or implied – that exceeds it should be flagged and considered carefully before sign-off.
- Think carefully about audience targeting. Steer clear of appealing particularly to under-18s or to those for whom the diet could produce a potentially harmful body weight. Review your media placements and targeting criteria accordingly, particularly on social media platforms where younger audiences are prevalent.
- Consider wider messaging on body image. Advertising campaigns which champion diversity in gender, age, ethnicity, body shape, disability, sexuality and in other ways are less likely to be the subject of complaint. Beyond regulatory compliance, brand owners have a broader opportunity to position themselves positively on these issues.
- Take advantage of CAP's free pre-clearance service. CAP's Copy Advice team provides free and bespoke pre-publication advice on non-broadcast ads and campaigns. This is an underused resource that can provide significant comfort before a non-broadcast campaign goes live, albeit it is important to note that any advice is not legally binding and the ASA can still investigate and rule against an ad that has been cleared by the service.
How Mishcon de Reya can help
Our Advertising and Marketing team advises brand owners on advertising compliance and ASA inquiries. The team works closely with clients to clear advertising copy, develop proactive compliance strategies, respond to enforcement action and adopt sustainable internal processes. If you have questions relating to any stage of your advertising and marketing development, please get in touch with our Advertising and Marketing team.