Sport context · research ranges, not prescriptions

Choose the sport.
Then test the fit.

Search an ingredient inside the demands of a modality and athlete profile. Dose ranges come from human research and qualified consensus; coaches, creators and podcasts remain a discovery layer until the underlying evidence is checked.

51modalities
9demand families
8athlete profiles
Three-layer rule
Coach or podcast

Surfaces the practical question and the named guest.

Qualified specialist

Adds event and athlete context within their real expertise.

Human evidence

Controls the studied dose, confidence and safety boundary.

Long endurance · aerobic endurance · running economy · heat and hydration

Road running

From recreational 5K training to marathon preparation. The matches below are a research map for this demand profile—not a ready-made stack.

13context matches
Best fitStrong evidence overall

Caffeine

Endurance and perceived effort

The most consistent performance signal is in aerobic endurance, but response and sleep cost vary.

Research context
1.5–3 mg/kg as a lower trial range
Timing
Usually 30–60 minutes before; trial in training
Watch

Avoid late-day use when it compromises sleep.

Open the full evidence note →
Best fitModerate evidence overall

Beetroot / Nitrate

Exercise economy

Most relevant to submaximal endurance and selected time-trial settings; trained responders vary.

Research context
400–800 mg nitrate
Timing
2–3 hours before the target session
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Low blood pressure

Open the full evidence note →
ConditionalStrong evidence overall

Sodium Bicarbonate

Hard intervals and shorter high-intensity races

The evidence window is closer to hard efforts lasting about 30 seconds–12 minutes, not routine marathon or ultramarathon use.

Research context
0.2–0.3 g/kg in single-dose research
Timing
60–180 minutes before after repeated tolerance trials
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The high sodium load and frequent gastrointestinal effects can outweigh a small performance gain.

Open the full evidence note →
Best fitStrong evidence overall

Glucose–Fructose Carbohydrate Blend

Fuel prolonged exercise

The hourly target rises with event duration. Multiple transportable carbohydrate becomes most useful at the highest long-event intakes.

Research context
30–60 g/hour; up to 90 g/hour beyond ~2.5 hours when gut-trained
Timing
During prolonged exercise, divided across each hour
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Practice the exact plan in training; more carbohydrate can worsen gastrointestinal symptoms when tolerance is not developed.

Open the full evidence note →
ConditionalModerate evidence overall

Maltodextrin

Rapid exercise carbohydrate

A practical glucose source with lower sweetness, but not proven superior to other well-tolerated formats.

Research context
Usually part of a 30–60 g/hour carbohydrate plan
Timing
During prolonged exercise or rapid recovery
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Diabetes or impaired glucose regulation

Open the full evidence note →
ConditionalModerate evidence overall

Dextrose / Glucose

Rapid exercise carbohydrate

Useful within a measured fueling plan; glucose alone is not the preferred way to reach the highest hourly targets.

Research context
Usually part of a 30–60 g/hour carbohydrate plan
Timing
During prolonged exercise
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Diabetes or impaired glucose regulation

Open the full evidence note →
ConditionalLimited evidence overall

Highly Branched Cyclic Dextrin

Intra-workout carbohydrate format

Low-osmolality formulation may suit some athletes, but small studies do not establish superior performance.

Research context
15–45 g per serving in small exercise studies
Timing
Before or during exercise within the total hourly target
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Do not infer superiority from the Cluster Dextrin trademark

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ConditionalLimited evidence overall

Isomaltulose / Palatinose

Slower pre-exercise carbohydrate

Can produce a steadier glucose response, but that does not reliably improve performance and may limit rapid delivery.

Research context
50–75 g before exercise in small studies
Timing
Usually 30–60 minutes before
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Not the default choice for very high carbohydrate delivery during intense long events

Open the full evidence note →
ConditionalLimited evidence overall

Waxy Maize Starch

Exercise carbohydrate

Processing changes digestion speed; waxy maize is not automatically faster or better than dextrose or maltodextrin.

Research context
30–75 g in small studies
Timing
Before, during or after exercise according to the fueling goal
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Corn source does not prove a specific absorption speed

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ConditionalModerate evidence overall

Electrolytes

Fluid and sodium replacement

Relevant when session duration, climate and measured sweat losses justify it—not for every short workout.

Research context
300–1,000 mg sodium per hour during prolonged exercise
Timing
During prolonged exercise or heavy sweating
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Kidney disease

Open the full evidence note →
ConditionalStrong evidence overall

Whey Protein

Recovery and daily protein coverage

Useful when whole-food protein does not meet the athlete's daily target; the supplement itself is not sport-specific.

Research context
20–40 g per serving
Timing
When convenient around meals or training
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Milk allergy

Open the full evidence note →
Assessment onlyStrong evidence overall

Iron

Correct documented iron deficiency

Risk and need depend on symptoms, diet, menstrual blood loss, training load and laboratory assessment.

Research context
No performance dose without laboratory and clinical assessment
Timing
Empty stomach if tolerated; separate from competing minerals
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Excess iron can be harmful; do not use a generic sport dose.

Open the full evidence note →
Assessment onlyStrong evidence overall

Vitamin D

Correct inadequate vitamin D status

Useful when intake, sun exposure or testing identifies a need; not a universal performance enhancer.

Research context
Dose depends on status and clinician guidance
Timing
With a meal containing fat
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Hypercalcemia

Open the full evidence note →

Ingredient spotlight · sodium bicarbonate

One ingredient. Very different sport contexts.

0.2–0.3 g/kgsingle-dose research rangeUsually 60–180 minutes before, only after tolerance testing
Resistance training

Most plausible for repeated hard sets or muscular-endurance work—not a single maximal lift.

HYROX / functional fitness

May fit repeated high-intensity stations after a successful gastrointestinal tolerance protocol.

Running

Better matched to hard intervals and races near the 30-second–12-minute evidence window than to a marathon.

Swimming & rowing

Supported for selected high-intensity events and repeated-bout formats.

Combat sports

Studied in boxing, judo, karate, taekwondo and wrestling; weigh-in and gut tolerance still matter.

Team & racket sports

Potential fit for repeated intense bouts, but match design and individual response determine usefulness.

Not a daily default. Gastrointestinal distress is common, the sodium load is substantial, and combining it with caffeine or nitrate does not have a guaranteed additive benefit.

Open the complete bicarbonate evidence note →

Who informs this view

Source role, not popularity.

Consensus groups establish the evidence boundary. Qualified researchers help locate and interpret papers. A coach, creator or podcast can surface a question, but cannot set the dose without original supporting evidence.

Competition safeguard

Batch-tested lowers risk. It does not erase it.

Drug-tested athletes remain responsible for every substance found in their body. Check the current list, exact product and exact batch before use.

How to read this page

“Best fit” means the ingredient has a credible evidence path for a major demand of the selected modality. “Conditional” means the event, training block, environment or tolerance must match. “Assessment only” means deficiency or clinical context—not the sport name—drives use. These are studied ranges for adults, not individualized prescriptions.

51 modalities · 8 athlete profiles · 10 primary or official source routes