Lactate is an endogenous metabolite — your body produces it continuously, at rest and during exercise — and metabolic substrates of this kind are not what the WADA Prohibited List is built to catch. But "probably fine by category" is not the standard a federated athlete should accept, and it is not the standard we hold ourselves to. This page sets out the actual position: how the list works, what we have verified about our own product, where the real risk sits, and when you should not take it at all.
The short answer
Is lactate on the WADA Prohibited List?
No. Lactate is not a prohibited substance under WADA's current Prohibited List. It is not listed among substances or methods prohibited either in or out of competition. Athletes can check the official WADA database for the latest information: WADA Prohibited List search — Lactate
Is ExoLactate® Gel batch-tested by a third party?
Yes. ExoLactate® Gel is third-party batch-tested through Informed Sport. Details such as the batch number and testing date can be found on the Informed Sport website.
Can I declare it to my federation?
Yes, of course. ExoLactate® Gel can be declared to your federation or team. A technical data sheet and batch-specific Certificate of Analysis (CoA) can be requested from our team if required.
How the WADA Prohibited List actually works
What the list does not do is enumerate every permitted substance. There is no approved list. The absence of an ingredient from the Prohibited List is the mechanism by which it is permitted.
The World Anti-Doping Agency publishes a Prohibited List annually, and it comes into force on 1 January. A substance is considered for inclusion when it meets at least two of three criteria: it has the potential to enhance performance, it poses a potential health risk to the athlete, or it violates the spirit of sport.
The list is organised by category — anabolic agents, hormones and metabolic modulators, beta-2 agonists, diuretics and masking agents, and so on — and some categories apply at all times while others apply in competition only. What the list does not do is enumerate every permitted substance. There is no approved list. Substances and methods are prohibited where they fall within a listed category, including where the List expressly extends to substances with similar chemical structures or biological effects. An ingredient that does not appear on the List and does not otherwise fall within a prohibited class is not prohibited under the List.
This matters for a fuelling product: carbohydrate, electrolytes and metabolic substrates are not prohibited substances under the WADA Prohibited List. Lactate is not listed as a prohibited substance in the 2026 WADA Prohibited List, nor does the List identify lactate or lactic acid as a prohibited substance or method. Accordingly, lactate itself is not prohibited under the 2026 List. This conclusion applies to lactate as an ingredient and does not extend to any other substance or pharmacological compound that may accompany it in a formulation.
The risk that actually gets athletes banned
Almost no endurance athlete fails a test because they knowingly took a prohibited substance in a gel. They fail because of contamination — a supplement manufactured on shared equipment, or with a raw material that carried a trace of something prohibited.
The rule that governs this is strict liability. Under the World Anti-Doping Code, you are responsible for what is in your body, regardless of how it got there and regardless of intent. A contaminated product is not a defence in itself. This is why the question "is the ingredient legal?" is the less important of the two, and "how do I know what is actually in the sachet?" is the one that decides careers.
The only meaningful answer to the second question is independent batch testing. Programmes such as Informed Sport and NSF Certified for Sport test finished product batches against a broad panel of prohibited substances. ExoLactate® Gel is certified under the Informed Sport programme, which tests every batch before it is released to market. Athletes can verify FLF ExoLactate® Gel and check the relevant batch information through the Informed Sport database.
Safety: what to actually watch
Anti-doping status and safety are different questions, and the second one has more practical consequences for more athletes.
Sodium load
Exogenous lactate is typically delivered as a lactate salt or including other carriers, which means every dose carries sodium or other cations. ExoLactate® Gel provides 250 mg of sodium per gel, so at 2–3 gels per hour, that represents 500–750 mg of sodium per hour. Across a long event, this can contribute meaningfully to total sodium intake. For most athletes sweating heavily over several hours this is unremarkable or even useful, but it is not neutral, and it needs to be counted as part of your total electrolyte strategy rather than on top of it.
Gastrointestinal tolerance
Research published on oral sodium lactate has found that it can slow gastric emptying and blunt appetite, with the sodium and osmotic load acting as a co-variable — the study summary is here.
We highlight this research because it has a direct practical consequence. Slower gastric emptying and reduced appetite are not what you want in the fifth hour of an ultra, when the priority is to keep taking in fuel. Take it with fluid, avoid stacking it on top of an already maximal carbohydrate intake without adjusting accordingly, and rehearse the combination in training before race day.
Who should not take it without medical advice
- Anyone with a diagnosed metabolic disorder, particularly affecting lactate handling or mitochondrial function
- Anyone with renal impairment, in whom sodium and acid–base load are not trivial
- Anyone with cardiac conditions or on a medically prescribed sodium-restricted diet
- Anyone taking metformin, or medication affecting lactate clearance
- Pregnant or breastfeeding athletes
This is not a formality. If you are in any of these groups, the correct sequence is to speak to your doctor first and bring the product documentation with you.
For team doctors, physiologists and nutritionists
If you are the person being asked to sign off on this for an athlete, you need primary documentation rather than marketing copy.
The mechanism, the metabolic pathways and the current state of the research are documented separately by our science team at exolactate.com, with ongoing study summaries on the research feed and future clinical trials to come. We would rather you read the evidence and reach your own conclusion than take ours.
Our position, plainly
We sell a fuelling product to athletes who are subject to testing, and that carries an obligation. We will state what has been verified and what has not, we will publish the research that complicates our story alongside the research that helps it, and we will not describe the product as compliant with anything until we can show you the document that says so.
If something on this page is unclear or out of date, tell us and we will correct it.