Contaminated Supplements and Doping Risk: What Anti Doping Danmark's Guidance Means for a Fitness Influencer's Brand Deals

Short answer: the contamination risk is real, but the doping rules only apply to some

Team Danmark's own guidance to athletes states that among the most popular dietary supplements on the market, there is a 10-15% risk of buying a contaminated product — rising to nearly 50% for products in tablet form. That's a real, documented risk, not a theoretical one. But Denmark's anti-doping rules don't apply to everyone who calls themselves a fitness influencer — they apply to whoever is actually organized under a sports federation under the Danish Sports Confederation (DIF), either as part of Anti Doping Danmark's prioritized test group, on the national elite list, as a competitive athlete more broadly, or under the separate Doping Regulations for Recreational Sports. This article covers both halves: what the contamination risk and certification schemes actually say, and who they're actually relevant to.

This is practical guidance from Make Influence, not legal advice. If a specific deal involves an athlete covered by the anti-doping rules, the specific situation should be assessed by Anti Doping Danmark itself or an advisor familiar with the anti-doping rulebook.

Who is actually covered by Denmark's anti-doping rules — and why "fitness influencer" alone isn't enough

It's a common assumption that anyone making fitness content and promoting supplements is, in practice, subject to doping testing and sanctions. That isn't correct. Anti Doping Danmark's own National Anti-Doping Rules apply to "all persons who participate in activity under a sports federation under the Danish Sports Confederation as a member, athlete, or in a support-staff function" — concretely, that covers athletes selected to Anti Doping Danmark's prioritized test group, other national elite listed on Anti Doping Danmark's federation overview, and other competitive athletes who practice competitive sport.

There's also a separate rule set for recreational sport: the Doping Regulations for Recreational Sports apply to athletes organized under DGI and Dansk Firmaidræt, as well as athletes under Danish Sports Confederation branches that aren't covered by the National Anti-Doping Rules. That means an organized amateur competitor who isn't on an elite or test-group list — for example, a fitness influencer who competes in a DGI- or DIF-organized bodybuilding, powerlifting or CrossFit competition — can still be covered, just under the lighter recreational rule set instead of the national elite rules.

Status	Which rule set applies	Maximum suspension for a violation
Elite/prioritized test group or national elite list	National Anti-Doping Rules	Up to 4 years
Organized amateur competitor (DGI, Dansk Firmaidræt, other DIF branches outside the elite list)	Doping Regulations for Recreational Sports	Up to 2 years
Fitness influencer with no competition license or federation affiliation	Neither — falls outside both rule sets	Not applicable; no doping sanction is possible

For a brand, the practical takeaway is: ask whether the fitness influencer you're considering actually competes under a sports federation — not just whether they make fitness content. One doesn't tell you the other.

The contamination risk: what Team Danmark and Anti Doping Danmark actually say

Team Danmark's own guidance on acquiring dietary supplements is specific about the numbers: among the most popular supplements on the market, there is a 10-15% risk of buying a contaminated product, and the risk rises to nearly 50% for products in tablet form. Anti Doping Danmark's own guidance on dietary supplements underlines that the problem isn't theoretical: "There are examples of athletes both in Denmark and internationally who unwittingly tested positive because a dietary supplement was contaminated." The sale of dietary supplements doesn't follow the same strict regulatory and control regime as medicine, which is part of why the risk is elevated compared with controlled medicine.

Certification: what it proves — and what it doesn't

Anti Doping Danmark's own guidance points to five named certification schemes that purity-test products for prohibited substances:

• Informed-Sport
• NSF Certified for Sport®
• BSCG Certified Drug Free
• Cologne List
• HASTA

Two important caveats, straight from the source. First, certification is batch-specific, not brand-specific: "Remember that it's the specific product with the specific batch number that has been tested — not necessarily every product from the same brand." A different product from the same brand, or a later batch of the same product, isn't automatically covered by an earlier test. Second, even a certification isn't a 100% guarantee — the testing meaningfully reduces the risk, but doesn't eliminate it entirely.

Strict liability: "I didn't know" isn't a defense — but only for those the rules actually cover

For an athlete who is actually covered by either the National Anti-Doping Rules or the Doping Regulations for Recreational Sports, a strict-liability principle applies. Anti Doping Danmark states it directly: "As an athlete, you're always personally responsible for what you consume," and: "If you test positive as a result of a dietary supplement or natural remedy, it's treated as doping under the rules. That applies even if you didn't know it contained a prohibited substance." Not knowing a supplement was contaminated is, in other words, not a valid excuse for an athlete covered by the rules — the consequence (suspension, loss of results, a public case) follows regardless of intent.

That principle applies specifically to the athlete themselves under Anti Doping Danmark's rulebook — it isn't a general legal standard that automatically extends to a brand's own liability toward the public or regulators. But it's exactly why a brand working with an athlete covered by the rules has a real commercial interest in the product that athlete recommends or personally uses actually being purity-tested.

Decision framework for a brand

Creator's status	Product's certification status	Recommended action
Competitive athlete (elite or recreational rule set)	Certified (Informed-Sport, NSF Certified for Sport, etc.)	Lower-risk partnership; still confirm the specific batch in use is the certified one
Competitive athlete (elite or recreational rule set)	Not certified, or certification unknown	High personal risk for the athlete — consider a different product, or be explicit that the athlete alone carries the risk of personally consuming the product before a competition
Fitness influencer with no competition license	Either	No doping-rule risk for the creator themselves, but certification is still a credibility signal for product quality to their audience

How this differs from Fødevarestyrelsen's claims rules

This is a separate question from dietary supplements and influencer marketing: what Danish food-advertising law requires, which covers which health and nutrition claims an influencer may use about a product under the EU's Claims Regulation. That article is about what may lawfully be said about the product. This article is about something different: whether the product itself actually contains a prohibited substance, regardless of what's said about it, and whether that carries a consequence for the specific person using it.

	Claims rules (Fødevarestyrelsen)	Doping rules (Anti Doping Danmark)
What it regulates	What may lawfully be said about the product's health effect	Whether the product's actual contents trigger a doping sanction for a covered athlete
Who it applies to	Any company and influencer marketing a dietary supplement in Denmark	Only athletes covered by the National Anti-Doping Rules or the Doping Regulations for Recreational Sports
Consequence of a violation	A sanction from Fødevarestyrelsen against the company	A suspension against the athlete personally

A hypothetical example (illustrative, not a real Make Influence customer)

The example below is invented and purely illustrative.

A supplement brand signs an ambassador deal with a fitness influencer who also competes in a DGI-organized powerlifting competition — and is therefore covered by the Doping Regulations for Recreational Sports, not the stricter National Anti-Doping Rules. The brand sends a pre-workout product carrying none of the five named certifications. The influencer personally uses the product before a competition and is randomly tested positive for a substance later traced to a contaminated batch of that exact product. Because the strict-liability principle applies under the Doping Regulations for Recreational Sports, "I didn't know" isn't a valid defense for the influencer personally — the consequence can be up to a two-year suspension from organized recreational sport, even though the contamination was unintended by either the influencer or the brand. Had the brand instead chosen an Informed-Sport-certified product from the same category, the risk for this exact scenario would have been substantially lower — though never zero.

Common Mistakes

• Assuming "fitness influencer" automatically means "subject to doping testing." The two don't necessarily connect — check specifically whether the creator competes under a sports federation.
• Assuming a certification on one product covers the brand's whole range. Certification is batch-specific, not brand-specific.
• Confusing this risk with the claims rules. The two rule sets are separate and solve different problems.
• Assuming certification means 100% safety. It meaningfully reduces the risk, but doesn't eliminate it.

Make Influence's Operational Perspective

In our experience, this risk is often overlooked because it falls between two stools: it's neither a pure marketing-law risk (like the claims rules) nor something most brands think of as an "influencer marketing" risk at all. But the moment a creator who competes themselves also personally uses the product they're promoting, the question becomes concrete and relevant — not a theoretical exercise. Our recommendation is simple: always ask whether a fitness or sports creator is themselves competitive before choosing a product for an ambassador deal, and choose a certified product if the answer is yes.

FAQ

Do the doping rules apply to an influencer who just trains at an ordinary gym without competing?

No. Without an affiliation to a sports federation under the Danish Sports Confederation — either via the National Anti-Doping Rules or the Doping Regulations for Recreational Sports — a fitness influencer isn't covered by either rule set, no matter how much content they make about training and supplements.

What's the difference between the National Anti-Doping Rules and the Doping Regulations for Recreational Sports?

The National Anti-Doping Rules apply to elite and competitive athletes (up to a 4-year suspension for a violation). The Doping Regulations for Recreational Sports apply to athletes organized under DGI, Dansk Firmaidræt, or other DIF sport branches not covered by the national rules (up to a 2-year suspension).

Is a certification like Informed-Sport or NSF Certified for Sport a legal guarantee against contamination?

No. The certifications purity-test the specific product with the specific batch number and meaningfully reduce the risk, but they don't provide a 100% guarantee, and a different batch of the same product isn't automatically covered by an earlier test's result.

Should brand-safety vetting of a fitness or sports creator include a check of whether they're competitive themselves?

Yes, if the partnership involves dietary supplements or other products the creator personally consumes. It's a specific, relevant check that belongs alongside the rest of the due diligence described in the brand safety checklist for influencer partnerships, even though it isn't one of the checklist's general eight points.

Does the post still need to be marked as an ad, regardless of this article's topic?

Yes — that's a completely separate question from both the doping risk and the claims rules. See influencer marketing disclosure rules in Denmark and the EU for the full disclosure duty.

What if the creator competes internationally, not just in Denmark?

Then WADA's global code and the relevant international federation's own rules may also be relevant, in addition to or instead of the Danish rule sets described here. This article covers only the Danish framework; an international athlete's situation should be assessed specifically by an advisor familiar with the relevant international rulebook.

Should this consideration be written into the contract with the creator?

It can be worth stating explicitly if the creator is competitive and the partnership involves dietary supplements, as part of the ordinary clarity around responsibility and expectations. See what to put in an influencer contract for the other terms a full contract should cover.