Disclaimer
Read this before using any OpenFuel formula. These are not formalities — they reflect real risks that require your informed judgement.
Educational Use Only
All formulas, ingredient information, dosing guidance, and research summaries published on OpenFuel are provided for educational and informational purposes only. They do not constitute medical advice, dietary advice, or nutritional counselling.
OpenFuel is not a healthcare provider, registered dietitian, or sports nutritionist. No content on this site creates a practitioner-patient or practitioner-client relationship of any kind.
If you have questions about your diet, health, or nutrition strategy, consult a qualified professional — a registered dietitian, sports nutritionist (CISSN or equivalent), or physician with relevant experience.
Personal Testing Responsibility
Never use a homemade formula in a race, competition, or high-stakes training session without first testing it extensively in lower-stakes training.
Gastrointestinal responses to sports nutrition formulas are highly individual. What works well for one athlete may cause significant GI distress in another. Factors including GI transit rate, fructose tolerance, lactate threshold, and hydration status all influence response.
The minimum recommended testing protocol before race use:
- At least 3–5 training sessions of increasing duration and intensity using the formula
- At least one full-length simulation effort (same duration and pace as target race)
- Testing at the anticipated ambient temperature and humidity of the event
- Gradual increase in carbohydrate intake rate if targeting 90+ g/h protocols
Anti-Doping Compliance
Athletes subject to anti-doping rules are solely responsible for ensuring compliance. OpenFuel formulas use common food ingredients (maltodextrin, fructose, sodium citrate, etc.) that are not prohibited substances under the WADA Prohibited List.
However, bulk ingredient contamination is a documented risk. Food ingredients sourced from bulk suppliers are not manufactured under the same contamination controls as NSF Certified for Sport or Informed Sport-certified products. Cross-contamination during processing or packaging can introduce trace amounts of prohibited substances.
Recommendations for competitive athletes:
- Source ingredients from suppliers with third-party batch testing (NSF, Informed Sport, Cologne List)
- Request Certificates of Analysis (CoA) for every ingredient lot before use
- Consider having finished product batches tested by an accredited laboratory before competition use
- Consult your national anti-doping organisation or clean sport advisory if uncertain
Ignorance of contamination risk is not a valid defence in anti-doping proceedings. The strict liability principle applies in most anti-doping frameworks.
Medical Conditions — Specific Risks
The following medical conditions may significantly affect the suitability of OpenFuel formulas. Consult a physician before using any high-carbohydrate or high-sodium formula if you have or suspect any of the following:
Diabetes (Type 1 or Type 2)
Formulas containing 30–60 g of rapidly absorbed carbohydrates per serving will significantly affect blood glucose. Insulin management strategy must account for exogenous carbohydrate intake during exercise.
Fructose intolerance / malabsorption
Multi-transportable formulas contain significant fructose (13–27 g per serving). Hereditary fructose intolerance is a rare but serious contraindication. Fructose malabsorption is more common and may cause GI distress at these doses.
Kidney disease
High-sodium formulas (400–600 mg per serving) and potassium-containing formulas may be unsuitable for individuals with impaired renal function. The kidneys regulate sodium, potassium, and fluid balance — impaired function alters tolerance significantly.
Hyponatraemia risk
Consuming high-sodium formulas alongside very high volumes of plain water can still produce exercise-associated hyponatraemia in susceptible individuals (particularly in ultraendurance events). Do not consume fluids at rates that significantly exceed sweat rate.
Eating disorders / disordered eating
Precise caloric and carbohydrate tracking in the context of disordered eating can be harmful. If this applies to you, work with a qualified sports psychologist and registered dietitian before implementing a structured fuelling protocol.
Regulatory Compliance
The regulatory status of homemade and commercially produced sports nutrition products varies significantly by jurisdiction. OpenFuel formulas are educational references — they are not approved, registered, or certified by any regulatory body.
United States
Sports nutrition products may be classified as food or dietary supplements under 21 CFR. Supplement manufacture requires GMP compliance (21 CFR Part 111). Personal production for personal use is generally not regulated, but commercial sale is.
European Union
Food for special groups (including sports nutrition) is regulated under Regulation (EU) 609/2013. Claims about carbohydrate contribution to energy metabolism are regulated under Regulation (EC) 1924/2006. High fructose content may require specific advisory text.
Australia / New Zealand
FSANZ Standard 2.9.4 governs formulated supplementary sports foods. Specific composition requirements, labelling rules, and prohibited claims apply to commercial products.
Before manufacturing OpenFuel formulas at any commercial scale, obtain regulatory advice from a qualified food law professional in your jurisdiction.
No Warranty
All OpenFuel formulas, research summaries, ingredient data, and associated content are provided "as is", without warranty of any kind, express or implied.
No warranty is made regarding:
- Efficacy — that the formula will improve performance or achieve any stated physiological goal
- Safety — that the formula is safe for any specific individual or condition
- Accuracy — that ingredient data, cost estimates, or research citations are current and correct
- Fitness for purpose — that the formula is appropriate for your sport, event, or physiological profile
OpenFuel and its contributors shall not be liable for any direct, indirect, incidental, or consequential damages arising from the use or misuse of any information or formula published here.
Contamination Risk — Bulk Ingredients
Bulk food-grade ingredients are not manufactured under pharmaceutical or supplement-grade contamination controls. The following contamination risks exist and should be understood before purchasing or using bulk ingredients:
Cross-contamination during manufacturing
Many bulk ingredient facilities process multiple compounds on shared equipment. This can introduce trace amounts of allergens, pesticides, or other compounds not declared on the label.
Prohibited substance contamination
Anti-doping databases (e.g., Cologne List) document confirmed contamination of sports nutrition products with prohibited stimulants, anabolic agents, and diuretics. The same risk applies to bulk ingredients sourced from facilities that also process supplement ingredients.
Heavy metal and microbial limits
Bulk carbohydrates and mineral salts can carry heavy metal contamination (lead, cadmium, arsenic) if poorly sourced. Request CoA documents showing heavy metal testing to FCC or USP limits.
Recommended mitigations: Review CoAs for every lot. Prefer suppliers with third-party testing programs. For competitive athletes, consider NSF Certified for Sport or Informed Sport-verified ingredient sources where available.
This disclaimer was last updated April 2026. It applies to all content on the OpenFuel platform. Use of any formula or information constitutes acceptance of these terms.