EPO Boost · VO2 Boost · TriFuel
Endurance Stack: EPO Boost + VO2 Boost + TriFuel
Three formulas for the whole effort. EPO Boost and VO2 Boost to support your training, TriFuel to fuel, hydrate and recover. One order, one price, delivered together.
- EPO Boost and VO2 Boost: drug-free daily and pre-training formulas to support endurance*
- TriFuel: 30 g carbs, 5 electrolytes and 6,000 mg BCAAs per serving
- Choose Wild Berry (caffeinated) or Lemon Lime (caffeine free)
1. What’s in your bundle
Daily foundation
A daily drug-free formula with iron, B12, folate and vitamin C to support oxygen use and endurance.*
★ 4.8 · 908 reviews
Training-day performance
Rhodiola, cordyceps, beta-alanine, quercetin and green tea extract for before your sessions, to support endurance and stamina.*
★ 4.8 · 146 reviews
Fuel and recovery
Carbs, electrolytes and BCAAs to fuel, hydrate and support recovery.*
★ 4.9 · 212 reviews
2. Choose your plan
| Serving Size: 2 Capsules Servings Per Container: 60 | ||
| Amount Per Serving | % DV* | |
|---|---|---|
| Vitamin C (as ascorbic acid) | 250 mg | 278% |
| Vitamin B3 (as niacinamide) | 5 mg NE | 31% |
| Vitamin B6 (as pyridoxine hydrochloride) | 6.2 mg | 365% |
| Folate | 333 mcg DFE | 83% |
| Vitamin B12 (as cyanocobalamin) | 150 mcg | 6250% |
| Iron (as iron ferrous bisglycinate chelate (Ferrochel®)) | 2 mg | 11% |
| BodyEndurance™ Complex (patent pending) | 706 mg | ** |
| Echinacea Extract 10:1 (Echinacea purpurea) (aerial), Yellow Dock Extract (Rumex acetosella) (root), Dandelion 4:1 Extract (Taraxacum officinale) (leaves), Choline Bitartrate, Inositol, PABA (Para-aminobenzoic acid), Boron (as boron bisglycinate chelate), Lycopene Extract 5% (Lycopersicum esculentum) (tomato), Lutein 5% Powder (Tagetes erecta L.) (Marigold flower), Vanadyl Sulfate | ||
| Alpha Lipoic Acid | 15 mg | ** |
Other Ingredients: Microcrystalline Cellulose, Vegetable Cellulose (capsule), Magnesium Stearate, Silicon Dioxide.
| Serving Size: 2 Capsules Servings Per Container: 60 | ||
| Amount Per Serving | % DV* | |
|---|---|---|
| Vitamin C (as ascorbic acid) | 120 mg | 133% |
| Vitamin B3 (as niacinamide) | 10 mg NE | 63% |
| Vitamin B6 (as pyridoxine hydrochloride) | 6.2 mg | 365% |
| Folate | 333 mcg DFE | 83% |
| Vitamin B12 (as cyanocobalamin) | 500 mcg | 20833% |
| Iron (as iron ferrous bisglycinate chelate (Ferrochel®)) | 9 mg | 50% |
| BodyEndurance™ Complex (patent pending) | 1,230 mg | ** |
| Echinacea Extract 10:1 (Echinacea purpurea) (aerial), Beta Alanine, Quercetin (Sophora japonica) (fruit), Rhodiola Rosea Root Extract (3% Rosavins) (1% Salidroside), Green Tea Extract (95% Polyphenols, 45% EGCG) (Camellia sinensis) (leaf), Cordyceps 7% Extract (Cordyceps sinensis) (mycelium), Inositol | ||
| Alpha Lipoic Acid | 15 mg | ** |
| Serving Size: 49.6 g (About 2 Scoops) Servings Per Container: 20 | ||
| Amount Per Serving | % Daily Value* | |
|---|---|---|
| Calories | 120 | |
| Total Carbohydrate | 30 g | 11% |
| Total Sugars | 15 g | ** |
| Includes 15 g Added Sugars | 30% | |
| Vitamin C (as Ascorbic Acid) | 60 mg | 67% |
| Vitamin E (as d-Alpha Tocopheryl Acetate) | 20 mg α-tocopherol | 133% |
| Calcium (as Calcium Carbonate) | 100 mg | 8% |
| Magnesium (as Magnesium Oxide) | 150 mg | 36% |
| Chloride (as Sodium Chloride, Potassium Chloride) | 762 mg | 33% |
| Sodium (as Sodium Chloride) | 300 mg | 13% |
| Potassium (as Potassium Chloride) | 300 mg | 6% |
| BCAA 2:1:1 (L-Leucine, L-Isoleucine, L-Valine) | 6,000 mg | ** |
| L-Glutamine | 3,000 mg | ** |
| L-Citrulline Malate | 2,000 mg | ** |
| L-Arginine Hydrochloride | 1,500 mg | ** |
| L-Theanine | 100 mg | ** |
| Caffeine Anhydrous | 60 mg | ** |
Other Ingredients: Maltodextrin, Dextrose, Silicon Dioxide, Citric Acid, Natural Flavors, Beet Root (for color), Sucralose, Xanthan Gum Powder.
| Serving Size: 2 Scoops (~44 g) (makes 8-20 fl oz) Servings Per Container: 20 | ||
| Amount Per Serving | % DV* | |
|---|---|---|
| Calories | 112 | |
| Calories from fat | 0 | |
| Total Fat | 0 g | 0% |
| Cholesterol | 0 g | 0% |
| Total Carbohydrate | 30 g | 10% |
| Carbohydrate Complex | 30 g | † |
| Dextrose | 15 g | |
| Maltodextrin | 15 g | |
| Branched-Chain Amino Acid Complex | 6,000 mg | † |
| L-Leucine | 3,000 mg | |
| L-Isoleucine | 1,500 mg | |
| L-Valine | 1,500 mg | |
| Endurance/Recovery Amino Acid Complex | 4,500 mg | † |
| L-Glutamine | 3,000 mg | |
| L-Arginine | 1,500 mg | |
| Electrolyte Complex | 1,584 mg | † |
| Sodium (as Sodium Chloride) | 300 mg | 13% |
| Potassium (as Potassium Chloride) | 300 mg | 9% |
| Magnesium (as Magnesium Oxide) | 150 mg | 38% |
| Calcium (as Calcium Carbonate) | 100 mg | 10% |
| Chloride (from Sodium Chloride and Potassium Chloride) | 734 mg | 22% |
| Anti-Fatigue Complex | 2,120 mg | † |
| L-Citrulline Malate | 2,000 mg | † |
| Vitamin C (Ascorbic Acid) | 60 mg | 100% |
| Vitamin E (as DL-Alpha Tocopherol Acetate) | 30 IU | 100% |
| Mental Performance Complex | 100 mg | † |
| L-Theanine | 100 mg | |
Other Ingredients: Citric Acid, Sucralose, Natural Flavors, Beta Carotene (color).
- EPO Boost: 2 capsules twice daily with meals. Take it daily during a training block, not only on hard days.
- VO2 Boost: 2 capsules with water, 30 to 60 minutes before training.
- TriFuel: Before: 30 minutes before, 1 serving (2 scoops) in 8 to 20 fl oz of water. During: 1 serving about every 90 minutes. After: 1 serving as part of your recovery routine.
Save 25% on every delivery and get free shipping. All three products arrive together, and you can skip, pause, change your TriFuel flavor or cancel anytime from your account.
Try the bundle for 90 days. If you are not satisfied, contact us for a refund. See our guarantee page for the full terms.
Free shipping on this bundle, whether you subscribe or buy one time. See our shipping policy for delivery times.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Individual results vary.
Three products. One system.
Build with EPO Boost, perform with VO2 Boost, fuel and recover with TriFuel. Each does its own job, together in one order.
- Build
Daily foundation
EPO Boost
The one you take every day
A drug-free daily formula with iron, B12, folate and vitamin C, plus a BodyEndurance Complex with echinacea, yellow dock, dandelion and inositol, to support oxygen use and endurance in training.*
- Iron
- Vitamin B12
- Folate
- Vitamin C
- Alpha lipoic acid
- Echinacea
When: Daily, with meals
See EPO Boost - Perform
Training-day performance
VO2 Boost
The one you take before the hard sessions
A BodyEndurance Complex with rhodiola, cordyceps, beta-alanine, quercetin and green tea extract, plus iron, B12 and vitamin C, to support endurance and stamina when it counts.*
- Rhodiola Rosea
- Cordyceps
- Beta-Alanine
- Quercetin
- Green Tea Extract
- Iron
- Vitamin B12
When: 30 to 60 minutes before training
See VO2 Boost - Fuel and recover
Fuel and recovery
TriFuel
The one that carries you through
Carbs, electrolytes and BCAAs per serving to help fuel long efforts, support hydration and support muscle recovery.*
- 30 g carbs
- 5 electrolytes
- 6,000 mg BCAAs
- 3,000 mg L-glutamine
- 100 mg L-theanine
- Caffeine in Wild Berry
When: Before, during and after
See TriFuel
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Individual results vary.
Your day on the Endurance Stack.
A simple rhythm built from the directions on each product: a daily foundation, a pre-session boost, then fuel and recovery.
- With meals
Lay the foundation
EPO Boost
Take it every day of your training block, not only on the hard days, so it is part of your routine.*
2 capsules twice daily with meals
- Before training
Get ready to work
VO2 Boost + TriFuel
VO2 Boost 30 to 60 minutes before your session. Start your TriFuel carbs, electrolytes and BCAAs so you begin topped up.*
VO2 Boost: 2 capsules with water. TriFuel: 1 serving (about 2 scoops) in 8 to 20 fl oz of water, 30 minutes before.
- During
Keep fueling
TriFuel
Steady carbs and electrolytes help keep your energy and fluid balance on track through the long efforts.*
1 serving about every 90 minutes
- After
Start recovery
TriFuel
BCAAs and L-glutamine support lean muscle repair after a hard day.*
1 serving as part of your recovery routine
Follow the directions on each product's label. Talk with your healthcare professional before starting any supplement. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
What you see is what you pay.
Three products at their regular price, or subscribe and take 25% off every delivery. Shipping is free either way.
What you get
Subscribe & save
$44.96 per product
Free shipping on every delivery. Skip, pause or cancel anytime.
Save $44.96 · 25% offOne-time purchase
$59.95 per product
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Prices are before tax. Subscription prices are per delivery.
Ingredients with published research.
What peer-reviewed studies and the NIH Office of Dietary Supplements say about the ingredients in the stack, including where the evidence is limited.
- TriFuel
Carbs and electrolytes on long efforts
1 hr+the point where the NIH says extra carbs and fluids matter
The NIH Office of Dietary Supplements notes that athletes doing endurance activity lasting more than an hour, or in extreme environments, might need to replace lost fluids and electrolytes and consume additional carbohydrates for energy.
Good to know: The fact sheet does not set an amount per hour, so follow your own fueling plan. One TriFuel serving has 30 g of carbohydrate and a five-mineral electrolyte blend.
NIH Office of Dietary Supplements: Dietary Supplements for Exercise and Athletic Performance
- TriFuel Wild Berry
L-theanine plus caffeine
11placebo-controlled human studies reviewed
A systematic review and meta-analysis of 11 randomized, placebo-controlled studies found moderate effect sizes favoring caffeine and L-theanine together, within the first 2 hours after the dose. The clearest effects were on alertness and on accuracy when switching attention between tasks.
Good to know: The evidence base is small, and the studies tested the pair together. Wild Berry has both (60 mg caffeine, 100 mg L-theanine). Lemon Lime has the L-theanine without caffeine.
- TriFuel Wild Berry
Caffeine
3 to 6mg per kg of body weight: the range shown to help performance
The International Society of Sports Nutrition position stand concludes that caffeine consistently improves exercise performance at 3 to 6 mg per kg of body weight. Doses as low as about 2 mg per kg may work, though the minimum effective dose is still unclear.
Good to know: A Wild Berry serving has 60 mg of caffeine, which is below that range for most adults. This card is background on caffeine, not a claim about one serving.
Guest et al., Journal of the International Society of Sports Nutrition, 2021
- VO2 Boost
Beta-alanine
2.85%median improvement in exercise measures across 15 studies
A meta-analysis of 15 studies (360 participants) found beta-alanine improved exercise measures more than placebo. Benefits showed up in efforts lasting 1 to 4 minutes and longer than 4 minutes, not under 1 minute.
Good to know: The studies used grams per day, and the NIH describes 4 to 6 g per day for at least 2 to 4 weeks. VO2 Boost's label lists beta-alanine inside a 1,230 mg complex without its own amount, so this is background on the ingredient, not on the dose in a serving.
- VO2 Boost
Rhodiola rosea
26randomized trials, 668 healthy participants
A 2025 meta-analysis found rhodiola was associated with higher VO2max (effect size 0.32) and longer time to exhaustion (0.38), with gains in VO2max larger at more than 600 mg per day. The studies were mostly under six weeks.
Good to know: Participants were mostly young, healthy people, the trials were small, and results varied between studies. VO2 Boost's label does not list the rhodiola amount on its own.
- EPO Boost + VO2 Boost
Iron, B12 and folate
3red-blood-cell nutrients in both formulas
The NIH explains that iron is a key part of hemoglobin, the red blood cell protein that carries oxygen from the lungs to the tissues. Vitamin B12 is needed for healthy red blood cell formation and DNA synthesis, and folate is needed to make DNA for dividing cells.
Good to know: These nutrients matter most when you are low. The NIH says B12 supplementation appears to have no beneficial effect on performance without a nutritional deficit. EPO Boost has 2 mg of iron and VO2 Boost has 9 mg per serving.
NIH Office of Dietary Supplements: Iron, Vitamin B12 and Folate fact sheets
These studies are on individual ingredients, not on EPO Boost, VO2 Boost or TriFuel themselves, and many used different amounts than a serving provides. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Reviewed by athletes who use them.
Ratings from the three products in the Endurance Stack.
-
EPO Boost
908 reviews
Read reviews -
VO2 Boost
146 reviews
Read reviews -
TriFuel
212 reviews
Read reviews
Ratings and review counts are from each product's page. Individual results vary.
Questions, answered
Everything to know before you order the Endurance Stack.
What is in the Endurance Stack?
One bottle of EPO Boost (60 servings), one bottle of VO2 Boost (60 servings) and one tub of TriFuel (20 servings) in the flavor you choose. All three arrive in one order.
Can I choose my TriFuel flavor?
Yes. Pick Wild Berry (60 mg of caffeine and 100 mg of L-theanine per serving) or Lemon Lime (caffeine free, with 100 mg of L-theanine). Subscribers can change their flavor from their account.
How do I take them together?
Each product's label has its own directions. As a simple rhythm: EPO Boost with meals each day, VO2 Boost 30 to 60 minutes before training, and TriFuel before, during and after your efforts. EPO Boost and VO2 Boost share a few ingredients (such as B vitamins, vitamin C, iron and alpha lipoic acid), so check the Supplement Facts on each label. Talk with your healthcare professional before starting any supplement.
How does the subscription work?
Subscribe and you save 25% on every delivery. Your bundle arrives on the schedule you choose, and you can skip, pause or cancel anytime from your account. Prefer not to subscribe? Buy it one time at the regular price. Shipping is free either way.
Does TriFuel contain caffeine?
Only the Wild Berry flavor does: 60 mg of caffeine per serving. Lemon Lime is caffeine free. Both flavors contain 100 mg of L-theanine.
I compete in a tested sport. What should I know?
BRL Sports formulas are drug-free. If you compete in a tested sport, review the full ingredient list of each product and your governing body's rules before you use them.
Is there research behind these ingredients?
Several of them have published studies, and the research section on this page links to each source. Those studies are on the individual ingredients, not on EPO Boost, VO2 Boost or TriFuel themselves, and the amounts studied can differ from the amount in a serving.
Should I talk to a doctor first?
Talk with your healthcare professional before starting any supplement, especially if you are pregnant or nursing, have a medical condition, or take medication.
What if it is not for me?
Try the bundle for 90 days. If you are not satisfied, contact us for a refund. See our guarantee page for the full terms.
Can I buy the products separately?
Yes. EPO Boost, VO2 Boost and TriFuel each have their own product page. The bundle puts all three in one order at a single price.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.