Top Picks — Athletic Performance

💪 Best Athletic Performance Supplements

Athletic performance supplements ranked by clinical evidence — for strength, endurance, power, and recovery. Creatine, beta-alanine, caffeine, and more.

126 ingredients reviewed Ranked by clinical evidence
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Top 5 — Ranked by Evidence

📈 Fastest Growing Athletic Performance Ingredients

Branded ingredients seeing rapid growth in formulator adoption and clinical research in 2024–2026.

🔬 Future Athletic Performance Ingredients to Watch

Lower current evidence but active research underway — these may become top picks within 2–3 years.

All Athletic Performance Ingredients (126)

Very Strong
Creatine Monohydrate
Strength and high-intensity exercise performance
Standard daily: 3-5 g/day (no loading needed). Optional loading: 20 g/day × 5-7 days,
Very Strong
Caffeine
Endurance and exercise performance
100–400 mg/day; performance: 3–6 mg/kg body weight 60 minutes pre-exercise; upper safe
Strong
Beta Alanine
Exercise capacity in hard efforts of about 1 to 10 minutes
4–6 grams per day, typically taken for 2–12 weeks
Strong
Whey Protein Isolate
Supports muscle protein synthesis
20-40 g per serving; the cited protein targets (1.4 to 2.0 g/kg/day for exercising adults, at least 1.0 to 1.2 g/kg/day for older adults) count all food, not just supplement.
Very Strong
Creapure® (Creatine Monohydrate — AlzChem)
Strength and power output
Loading: 0.3 g/kg/day for 5–7 days (typically 20 g/day split in 4 doses). Maintenance:
Strong
Whey Concentrate
Muscle growth and repair with resistance training
20–40 g post-workout for muscle growth/recovery; 1.6–2 g/kg/day total protein for
Very Strong
Iron
Oxygen transport
18 mg/day (women RDA); 27 mg/day (pregnant); 8 mg/day (men); therapeutic: 150–200 mg
Strong
Glucose / Dextrose
Endurance exercise fuel and delayed fatigue
Oral rehydration solution 13.5 g glucose/L; sports 40-80 g/L (4-8%); endurance 30-60 g/hr (90 g/hr glucose+fructose 2:1); post-exercise 1.0-1.2 g/kg plus protein.
Strong
PurCaf® (Organic Caffeine from Green Coffee — Applied Food Sciences)
Exercise performance in running trials
Commonly 100 to 200 mg per serving; performance studies use about 3 to 6 mg per kg.
Moderate
HMB (Beta-Hydroxy Beta-Methylbutyrate)
Endurance performance and VO2max
3 g/day in divided doses (1 g three times daily); HMB-FA: 1–3 g/day pre-workout;
Strong
Pea Protein Isolate
Muscle Thickness and Strength Gains
20-50 g per serving; 1.4-2.0 g/kg/day total protein for resistance training. 25 g
Strong
Sodium Bicarbonate (Baking Soda)
High-intensity exercise performance
0.3 g/kg body weight (typically 20–25 g for 70 kg person) taken 60–90 minutes before
Strong
Ashwagandha
Exercise Endurance
KSM-66® root extract: 300-600 mg/day (most stress/sleep trials). Shoden®: 120-240
Strong
Wellmune (Yeast Beta-Glucan)
Athletic Recovery Support
Most Wellmune trials use 250 mg/day, taken daily for periods of 4 to 12 weeks. Some
Moderate
Citrulline Malate
Resistance Training Performance
6-8 g pre-exercise (most clinical research dose); 8 g taken 60 minutes before training
Strong
Beetroot
Athletic endurance
About 300 to 500 mg of nitrate a day; the trials used beetroot juice, not capsules, and a 500 mg beetroot extract capsule is not the same as a studied dose.
Strong
InnovaTea® (Natural Caffeine from Tea — NutriScience)
Endurance Exercise Performance
Commonly 100 to 200 mg of caffeine per serving.
Moderate
Taurine
Exercise Performance
1.5 to 3 g/day in the two primary trials (500 mg three times daily; 3,000 mg/day); endurance studies used 1 to 6 g/day, with no sign larger doses worked better.
Limited
Provon® (Whey Protein Isolate — Glanbia)
Muscle protein synthesis after a whey dose
20-40 g whey protein isolate per serving across published trials. 20 g provides ~2.5 g
Moderate
Milk Protein (MPC/MPI)
Muscle protein synthesis similar to whey at a matched 20 g dose
MPS: 20 g = whey-equivalent. Trommelen 2020: 38 g sustained MPS 5+ hr. PRE-BED: 30-40
Moderate
Oceanix™ / TetraSOD® (Tetraselmis chuii Marine Microalgae — Fitoplancton Marino)
Explosive strength recovery after intense training
25 mg/day Oceanix — the small concentrated clinical dose used across multiple trials.
Moderate
Blackcurrant Extract (Ribes nigrum Fruit)
Endurance and repeated-sprint exercise performance
Sports trials: 300 to 600 mg/day of New Zealand blackcurrant extract (about 105 to 210
Moderate
Casein Protein
Muscle size and strength with resistance training
PRE-SLEEP: 20-40 g casein 30 min before sleep (Res 2012: 40 g intrinsically labeled).
Moderate
Glycerol (Glycerin)
Endurance exercise performance in the heat
Before exercise: 1.0 to 1.2 g/kg body weight (or 1.4 g/kg fat-free mass) with about 21
Moderate
Adenosine 5'-Triphosphate (ATP)
Athletic Performance Adjunct
400 mg/day disodium ATP (research-validated dose, primarily based on PEAK ATP studies)
Moderate
Beef Protein Isolate
Lean mass & strength (vs whey)
20-46 g/day (standard 20-30 g/dose post-workout); total protein targets of 1.6-2.0 g/kg/day are general recommendations for protein from all sources, not beef protein isolate specifically.
Moderate
Creatine HCL
Strength and muscle size with resistance training
Typical dosing: 1.5-3 g/day of creatine HCL based on marketing claims of higher
Moderate
HydroMax® (Glycerol Powder — Glanbia Nutritionals) (Glycerol Powder — Glanbia Nutritionals) (Glycerol Powder — Glanbia Nutritionals) (Glycerol Powder — Glanbia Nutritionals)
Supports pre-exercise hydration by retaining more fluid than water alone
Pre-exercise glycerol hyperhydration: typically 1.0–1.5 g glycerol per kg body weight
Moderate
Sodium / Electrolyte Sodium
Fluid retention and rehydration after exercise
1,500–2,300 mg/day dietary sodium (AI/UL); electrolyte replacement during exercise:
Moderate
Soy Protein
Muscle and strength gains with resistance training
MUSCLE/RT: 20-40 g/day. FDA HEART CLAIM: 25 g/day. Anderson 1995 NEJM meta 38 trials:
Moderate
Sustamine® (L-Alanyl-L-Glutamine)
Endurance and Time-to-Exhaustion
Exercise/hydration trials used roughly 1–2 g per 500 mL of fluid during activity, or
Moderate
AstaZine® (Natural Astaxanthin from Haematococcus pluvialis — BGG)
Athletic Performance and Recovery
4-12 mg/day AstaZine (research-validated; some applications 12-24 mg)
Moderate
Betaine / TMG (Trimethylglycine)
Athletic performance: strength, mainly lower body
2–6 g/day; athletic performance: 2.5 g/day (most studied dose); homocysteine
Moderate
Pycnogenol® (French Maritime Pine Bark)
Endurance training and exercise recovery
50–200 mg/day; cardiovascular: 100–200 mg/day; cognitive: 100 mg/day; athletic
Moderate
Sodium Citrate
May Support High-Intensity Performance
Ergogenic protocols use 0.3-0.5 g/kg body mass (about 0.5 g/kg most effective), taken
Moderate
Zynamite® PX (Mango Leaf Extract for Sports Performance)
Peak power output improvement in single dose
140 mg Zynamite plus 140 mg quercetin as a single dose about 1 hour before exercise, per the sprint trial; no trial has tested it as an ongoing daily supplement.
Limited
GlycerPump™
Pre-exercise hyperhydration (glycerol class)
1.2 g glycerol/kg body weight in 26 mL/kg of fluid, 30 minutes before exercise, from the generic glycerol trials; no branded GlycerPump trials exist.
Moderate
AstaPure® (Natural Astaxanthin — Algatech)
Antioxidant and recovery support
4 to 12 mg per day, taken with a fat-containing meal for absorption.
Moderate
BetaTor® (HMB Free Acid)
Muscle preservation
About 1 to 3 grams per day, often around training.
Moderate
Gynostemma pentaphyllum (Jiaogulan / Southern Ginseng)
VO2max and exercise fatigue: one 12-week trial of a gypenoside L extract
200 to 450 mg standardized extract daily, or 3 to 9 g a day of dried herb as tea; the
Moderate
KSM-66®
Strength, Endurance, and Recovery
600 mg/day of root extract, usually 300 mg twice daily, in most trials; a 250 mg/day arm was also tested, and 675 mg/day in the oligospermia trial.
Moderate
L-Carnitine
Less muscle soreness and muscle damage after exercise
General supplementation: 1-3 g/day L-carnitine. Athletic recovery: 2 g/day L-carnitine
Moderate
L-Citrulline
Improved Exercise Performance
3–6 g/day L-citrulline or 6–8 g/day citrulline malate (2:1 ratio) 30–60 minutes
Moderate
L-Ornithine
Exercise fatigue reduction via ammonia clearance
2–6 g/day; fatigue reduction: 2 g before exercise; sleep: 400 mg before bedtime; liver
Moderate
NewCaff™ (Microencapsulated Natural Caffeine)
Exercise performance
100 to 200 mg of caffeine per serving; performance trials use about 3 to 6 mg per kg of body weight, but from studies of plain caffeine, not any study of NewCaff.
Moderate
Nitrosigine® (Arginine Silicate)
Recovery and muscle damage reduction
1,500 mg/day; most studies use 1,500 mg taken 30–60 minutes pre-exercise
Moderate
Palatinose™ (Isomaltulose)
Sustained exercise fueling
25–75 g per dose in acute glycemic and exercise trials, typically replacing sucrose or
Moderate
Sensoril® (Ashwagandha Extract — Kerry/Natreon)
Strength gains with resistance training
125-500 mg/day Sensoril (research-validated; stress applications often 250 mg/day)
Moderate
ZMA® (Zinc Magnesium Aspartate — Lonza)
Athletic Recovery and Muscle Strength
30 mg zinc + 450 mg magnesium + 10.5 mg B6 (per ZMA standard formulation)
Limited
PurTea® (Organic Green Tea Caffeine — Applied Food Sciences)
Exercise performance
Commonly 100 to 200 mg of caffeine per serving.
Moderate
L-Arginine
Aerobic capacity (VO2max)
3 to 6 g/day is typical in consumer products; the cited blood pressure meta-analysis
Moderate
Rhodiola Rosea
Endurance and VO2max in pooled exercise trials
200–600 mg/day standardized extract, taken before meals; the cited stress and mood
Limited
Alpha-GPC
Power output and athletic performance
AD/MCI: 400 mg × 3/day = 1200 mg/day. COGNITIVE: 300-600 mg/day. ATHLETIC: 250-600 mg
Limited
Brown Rice Protein (Oryza sativa)
Lean mass and strength gains similar to whey with training
48 g of rice protein isolate after each workout (3 days a week) for 8 weeks; 24 g of
Limited
Panax notoginseng (Sanqi)
Endurance time in cycling tests
1,350 mg/day for 30 days in the endurance trial; 3 g/day for 3 days in the blood sugar
Limited
Urolithin A
Muscle Strength in Middle-Aged Adults
Standard dose: 500-1,000 mg/day urolithin A direct supplementation. Most clinical
Limited
VitaCherry® Sport (whole tart cherry recovery powder — FutureCeuticals)
Supports post-exercise muscle recovery
Marketed at roughly 400 mg/day; class evidence used ~480 mg tart-cherry powder or ~30 mL Montmorency concentrate/day
Limited
Bovine Colostrum
Exercise-induced gut permeability
10-20 g/day for 8-12 weeks in most human trials; a smaller set of trials used 0.5-1.0
Limited
Cluster Dextrin® (Highly Branched Cyclic Dextrin)
Lower perceived exertion in endurance work
15 to 70 g per session in sports products; cited human studies used 15 g during endurance exercise and 45 g during a resistance training session.
Limited
Lacprodan® (Whey and Milk Protein Ingredients — Arla Foods Ingredients)
Whey protein and muscle protein synthesis
Class-level whey dosing in muscle protein synthesis trials is typically 20-40 g per serving (about 2-4 g leucine). No Lacprodan variant itself has been tested, so there is no studied dose for this product.
Limited
MuscleGuard™ (Vegan 4-Nutrient Sports Performance Blend — Lonza)
Composite muscle score up 63.5 points vs placebo (no exercise)
Single daily dose providing the patent-pending ratio: 1500 mg L-Carnitine + 2000 mg
Limited
Whey Protein Hydrolysate
Faster recovery of muscle force in one small trial
20-30 g of whey protein hydrolysate per serving, taken before, during, or shortly after training, with total daily intake adjusted to overall protein targets.
Limited
Black Ginger (Kaempferia parviflora / Krachaidum / Thai Ginseng)
Exercise capacity and physical performance
Human trials used 25 to 90 mg/day in elderly fitness, 180 mg/day in soccer players, 360 mg/day in adolescent athletes, and 100 mg/day in the erectile-function pilot.
Limited
cellflo6® (Gallate-Enhanced Green Tea Procyanidins — PLT Health)
Investigated for blood flow following resistance exercise
600 mg/day cellflo6 — the dose showing significant blood flow improvements in the
Limited
CordyFuel™ (Branded Cordyceps Extract)
Supports exercise endurance and oxygen utilization
Branded-specific dosing is not well defined in indexed trials. Class-level cordyceps
Limited
Creatinol-O-Phosphate (COP)
Niche pre-workout ingredient
Italian cardiology trials used variable parenteral and oral doses depending on
Limited
ElevATP®
May Support Strength Adaptations
150 mg/day in branded human studies, taken with or without other workout ingredients.
Limited
GlycerSize™
Pre-exercise hyperhydration (glycerol class)
No branded GlycerSize™ RCTs. Glycerol-class hyperhydration protocols typically use
Limited
Kre-Alkalyn
Supports Muscle Strength and Power
Manufacturer-recommended use is 1.5-3 g/day without a loading phase; head-to-head
Limited
L-Isoleucine
Muscle Protein Synthesis (Adjunct to Leucine)
Typically as part of BCAA blends (2:1:1 leucine:isoleucine:valine); standalone rarely
Limited
PEAK ATP® (Disodium Adenosine Triphosphate)
Strength and lean body mass gains
400 mg/day PEAK ATP® (disodium ATP); acute: 400 mg taken 30–60 minutes pre-exercise;
Limited
PeptiStrong® (AI-Discovered Fava Bean Peptides)
Muscle protein synthesis and recovery acceleration
2,400 mg/day PeptiStrong® (clinical dose across 3 RCTs); taken daily; muscle recovery
Limited
RipFACTOR® (Sphaeranthus + Mango Bark Blend for Muscle Strength — PLT Health)
Muscle strength with resistance training
Tested: 650 mg/day of LI12542F6 for 56 days, or 425 or 850 mg/day of a water-dispersible version; the two were standardized differently, so equal mass is not an equal marker dose.
Limited
Senactiv®
Endurance: longer cycling time to exhaustion with purified Rg1
50–100 mg/day is what products typically provide; none of the cited human studies tested this dose or this blend.
Limited
Sodium Phosphate
Proposed Oxygen Delivery Support
Loading protocols typically use about 1 g of sodium phosphate four times daily
Limited
Strengthera™
Lower body strength improvement
650 mg/day; significant results beginning at 4 weeks
Limited
Terminalia Arjuna (Oxyjun®)
Cardiorespiratory endurance improvement
400 mg/day Oxyjun® in the single published, manufacturer-run heart-function trial; generic arjuna was used at 500 mg three times daily in the angina trial.
Limited
TestFACTOR® (Testosterone + Sexual Wellness)
Serum testosterone rose as a secondary marker in two muscle-strength trials
PERFORMANCE: 325 mg/day × 8 wk testosterone + sexual function. ULTRA-PERFORMANCE: 650
Limited
Velositol® (Chromium-Driven MPS Complex - Nutrition 21)
Significantly Increases Muscle Protein Synthesis (MPS)
2 g/day Velositol with protein (research-validated)
Strong
NUTRALYS® Pea Protein (Roquette)
Muscle Protein Synthesis Comparable to Whey
20-50 g/day pea protein for muscle/sports applications; per product specification for
Limited
Ashwa.30™ (Low-Dose Ashwagandha Root Extract — Natural Remedies)
Supports aerobic endurance in active adults
30 mg/day, one capsule, for 28 days (stress trial) or 56 days (endurance trial)
Limited
Betalains (Beetroot Pigments)
Small endurance gains from a betalain concentrate
BEETROOT JUICE: 250-500 mL/day (~5-10 mmol nitrate + 30-100 mg betalains).
Limited
BODYBALANCE® (Bioactive Collagen Peptides — Gelita)
Muscle strength gains alongside resistance training
15 grams a day for 12 weeks, alongside a resistance training programme. That is the
Limited
Caffinity® (natural coffee-fruit caffeine complex — FutureCeuticals)
Supports exercise performance and endurance output
286 mg Caffinity (~200 mg natural caffeine + ~15 mg coffee-fruit polyphenols), single pre-exercise dose
Limited
Capsaicin / Capsicum Extract (Cayenne Pepper)
Muscular endurance in short exercise tests; no aerobic endurance gain
2-10 mg total capsaicinoids/day (from 25-100 mg capsicum extract) in weight trials; exercise studies used a single 12 mg dose before training.
Limited
Capsifen® (Bioavailable Capsaicinoids via FenuMat® — Akay Bioactives)
Endurance: longer time to exhaustion
100-200 mg/day.
Limited
Carbelac® (Whey Protein Concentrate — Carbery)
Strength gains with resistance training, from generic protein and whey trials
No dose of Carbelac itself has been tested. Whey protein powders are commonly used at
Limited
CarnoLife® (L-Carnitine L-Tartrate)
Exercise recovery
Commonly 1 to 2 grams of L-carnitine L-tartrate per day.
Limited
CherryPure® (Montmorency Tart Cherry — Shoreline Fruit)
Exercise recovery
Often 480 mg of cherry powder per day, or the equivalent in juice concentrate.
Limited
DL-185® (Dileucine)
Higher muscle protein synthesis than leucine in one 10-man trial
2,000 mg (2g) once daily; absorbed 185% faster than equivalent leucine dose; clinical
Limited
EnduBerry™ Nu
Faster 5 km endurance run in one trial of a different haskap powder
The cited trial used 6 g a day of freeze-dried haskap berry powder (about 150 mg anthocyanins), but that was a different company's powder, so no dose has been established for EnduBerry Nu itself.
Limited
Gremin™ (Green Coffee + Curcumin BioFusion Complex)
Muscle soreness and recovery after damaging exercise
Per Gremin™ clinical dosing; BioFusion Technology formulation per manufacturer
Limited
NUTRALYS® Wheat Protein (Roquette)
Plant protein for muscle support
No consumer supplement dose established for this branded ingredient; generic wheat protein trials used 30 g in young adults and 60 g in older adults, while 35 g in older adults did not.
Limited
PrimaVie® (Shilajit Extract — Natreon)
Muscle strength retention after fatiguing exercise
Clinical trial dose: 250 mg twice daily (500 mg/day total) for 90 days. CoQ10
Limited
Quercefit® (Quercetin Phytosome — Indena)
Run Time and Recovery in One Unblinded Athlete Registry
250 to 500 mg/day, about 100 to 200 mg quercetin, in the studies; the 1,000 mg/day senolytic figure comes from trials pairing quercetin with a prescription drug, not tested for this product.
Limited
Recoverben® (Lemon Verbena Extract — Vital Solutions)
Less loss of muscle strength after hard exercise
Around 400 mg per day, often taken before exercise.
Limited
Robuvit® (French Oak Wood Extract — Horphag Research)
Athletic endurance in amateur triathletes
300 mg/day Robuvit®; fatigue studies use 300 mg/day; athletic performance: 300 mg/day
Limited
Tart Cherry Extract
Faster post-exercise muscle strength recovery
Recovery: two 8 oz servings of tart cherry juice a day, or 30 mL of concentrate twice a day; sleep: 30 mL of concentrate twice a day. No cited study tested a capsule dose in milligrams.
Limited
Vinitrox™ (Grape and Apple Polyphenols — Nexira)
Endurance: time to exhaustion in a cycling test
Around 500 mg per day, often taken before exercise.
Limited
FitNox® (Plant Nitric Oxide Complex)
Exercise support (mechanistic)
Around 250 mg per day.
Limited
Prodiet® Colostrum (Bovine Colostrum — Ingredia)
Recovery support
Trials used 20 g/day, 25 g/day, or 3.2 g/day of colostrum powder. Ingredia's suggested minimum, about 0.4 to 0.5 g of powder a day, is far below the amounts used in those trials.
Limited
Phosphorus / Phosphate
Phosphate loading for endurance performance
700 mg/day (RDA for adults); athletic phosphate loading: 3–4 g/day sodium phosphate
Preliminary
MyoVera™ (Chromium-Based Muscle Protein Synthesis Amplifier — Nutrition 21)
Short-term muscle protein synthesis (related ingredient, 10 people)
No studied dose exists for MyoVera; no trial of it has been published. The related amylopectin and chromium complex was tested at 2 grams with 6 grams of whey protein in ten adults.
Moderate
Dynagenix® (Water-Soluble Boswellia for Joint + Muscle Recovery — PLT Health)
Faster strength recovery after downhill running (60 mg a day, 10 days)
60 mg a day for 10 days in the single published Boswellia serrata recovery pilot; the 40 mg a day joint figure comes from manufacturer material, not a published trial.
Moderate
HydroPrime® (Stabilized Glycerol — NNB Nutrition)
Endurance exercise performance in the heat
2–6g glycerol (as HydroPrime®) 1–2× daily; pre-exercise hyperhydration: 1g/kg
Moderate
Phosphatidylserine
Cycling time to exhaustion
100-300 mg/day for cognition, with cited trials using 300 mg/day; the exercise trials
Limited
Cordyceps
Studied for endurance exercise performance: small trials, results vary
About 1 g/day of Cs-4 in the older-adult trial, 2 g/day in the marathon trial, 3 g/day in the cyclist trial; 1.5 g/day of Cordyceps militaris; 4 g/day of a six-mushroom blend.
Limited
Mitopure® (Urolithin A — Amazentis)
Muscle strength gain (secondary endpoint)
Standard clinical dose: 500-1,000 mg/day Mitopure®. Most clinical trials use 500-1,000
Limited
Pyruvate (Calcium Pyruvate / Sodium Pyruvate)
Body fat reduction with exercise
MODERN: 5-10 g/day Ca/Na pyruvate (Kalman 1999: 6 g/day × 6 wk). STANKO 1990s: 22-53
Preliminary
Higenamine (Norcoclaurine)
Exercise performance and endurance claims lack human support
Oral trials: 50-150 mg/day for 8 weeks; 75 mg/day (25 mg three times daily) for 3
Preliminary
PureATP (Pure Adenosine 5'-Triphosphate Disodium)
Maximal Strength: Pooled Gain From Two Small Trials, Not Reps or Power
400 mg/day ATP disodium in enteric-coated capsules, the dose used in the branded-ingredient trials. None tested an uncoated bulk powder.
Moderate
Carnipure® (L-Carnitine — Lonza)
Athletic recovery and performance
Same as generic L-carnitine: 1-3 g/day general supplementation. Specific applications:
Moderate
GeniusPure® (High-Purity Alpha-GPC)
Neuromuscular performance and power output
Healthy adults: 315 mg or 630 mg as a single dose in the GeniusPure trial, or 600 mg/day for six days. Alzheimer's trials used 1,200 mg/day, a medical rather than general supplement dose.
Moderate
Pomegranate Extract
Strength recovery after muscle-damaging exercise (small trials)
Standard cardiovascular dose: 500-1,500 mg/day pomegranate extract standardized to
Moderate
zümXR® (Targeted-Release Caffeine Technology — PLT Health)
Caffeine's performance benefits with a lower peak: proposed, not yet tested
Caffeine doses typically 50-300 mg per serving (matching immediate-release caffeine
Limited
Ecdysterone / Turkesterone (Ecdysteroid Anabolics)
Lean muscle mass increase without hormonal side effects
Ecdysterone: 500–1,000 mg/day (12-week RCTs); Turkesterone: 500 mg/day; both: taken
Limited
Epicatechin (Myostatin Inhibitor / Muscle Flavonol)
Grip and leg strength in older adults (small trials)
About 50 mg/day for 7 days in Gutierrez-Salmean 2014; Mafi 2019 gave daily oral epicatechin for 8 weeks alongside resistance training.
Limited
Nitratene® (Stabilized Beet Root Nitrate)
Exercise capacity: helps in tests to exhaustion, less clear for timed performance
No dose of Nitratene itself has been tested; research used generic nitrate at about 6 to 13 mmol per day (400 to 800 mg), or 250 mL beetroot juice. A capsule is not shown equivalent to juice.
Limited
Oxystorm® (Red Spinach Nitrate)
Nitrate for endurance & blood flow
A single 1,000 mg dose providing about 90 mg nitrate in the one Oxystorm-specific trial; generic dietary-nitrate trials used roughly 300 to 600 mg nitrate per day.
Limited
PeakO2® (Adaptogenic Mushroom Blend)
Better oxygen uptake (VO2 max) after three weeks
1–4g/day for ongoing use; 4g/day for clinical performance benefits (21-day loading);
Limited
Restoridyn® (Tart Cherry Extract — Anthocyte)
Faster jump recovery in one small trial of young women
The label dose is 480 mg once or twice daily, but no cited study tested 480 mg of extract; the recovery trial used 30 ml of tart cherry concentrate twice daily.
Limited
SalidroPure™ (Pure Salidroside)
Anti-fatigue and endurance
No human trial has tested the 3 to 5 mg label dose; trials of pure salidroside used 60 mg/day or 600 mg/day.
Limited
Shilajit
Muscle strength and exercise performance: one uncontrolled pilot
Standard clinical dose: 250 mg twice daily (500 mg/day total) of purified shilajit
Limited
Silk Amino Acids / Silk Fibroin Hydrolysate
Modest athletic stamina effect (small trial)
Cognitive: 200-600 mg/day of silk fibroin enzyme hydrolysate; the one stamina trial used far more, 500 mg per kilogram of body mass a day (about 35 g for a 70 kg athlete).
Limited
AlphaSize® (Alpha-GPC — Chemi Nutra)
Power and exercise output
300 to 600 mg per day for cognition; about 600 mg pre-exercise in sports studies.
Limited
Molecular Hydrogen (H2)
Exercise: less perceived effort and lactate, no endurance gain
Oral hydrogen-rich water, about 11 mg H2/day (one tablet in 250 mL, three times daily) in the 24-week metabolic syndrome trial; other cited trials used 3.5 mg/day and 7.5 mg/day.