View the Supplement Facts label
Servings Per Tub: 60
Serving Size: 1 scoop, 2g
Active Ingredients per Serving:
- PeakO2 Blend - 2,000mg
- (Cordyceps militaris, Reishi, King Trumpet, Shiitake, Lion's Mane, Turkey Tail)
Other Ingredients: None (unflavored).
Other Ingredient Information
- Organic mushrooms grown in the USA on organic oats, using both mycelium and fruiting body.
- Unflavored, gluten-free, non-GMO, and stimulant-free. Individual mushroom amounts are not disclosed.
Health Considerations
- Contains mushrooms. Avoid if you have a known mushroom allergy.
- Consult your healthcare provider before use if you are pregnant, nursing, taking medication, or have a medical condition.
PeakO₂® Organic Mushroom Blend — 2,000 mg total
Cordyceps (Cordyceps militaris): Adaptogenic mushroom included to support oxygen utilization, energy production, endurance, and exercise performance.*
Reishi (Ganoderma lucidum): Adaptogenic mushroom traditionally used to support immune function, stress resilience, and overall wellness.*
King Trumpet (Pleurotus eryngii): Ergothioneine-containing mushroom that provides antioxidant support against oxidative stress.*
Shiitake (Lentinula edodes): Beta-glucan-containing mushroom traditionally used to support immune function and overall wellness.*
Lion’s Mane (Hericium erinaceus): Mushroom included to support cognitive function, focus, and nervous-system health.*
Turkey Tail (Trametes versicolor): Polysaccharide-rich mushroom traditionally used to support immune and gut health.*
*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.
Dosing: Mix 1 serving (1 scoop, 2 g) into your beverage 1–2 times daily.
Timing: On training days, take 1 scoop before and 1 scoop after exercise. On rest days, spread 2 servings throughout the day.
Directions: Mix each scoop with 6–8 oz of water, coffee, a smoothie, pre-workout, or another beverage. Consistent daily use is recommended.
Warnings: Do not exceed the recommended serving size. Consult your healthcare provider before use if you are pregnant, nursing, taking medication, or have a medical condition. Keep out of reach of children.
Reviewed by Garett Reid, MSc, CSCS, CISSNStrength coach & sports nutrition specialist · · About the author
PeakO₂ is a stimulant-free performance blend built around a smart idea: combining Cordyceps, the mushroom most associated with endurance, with others for recovery, focus, and immune support. It's easy to use, too. It's unflavored and mixes into coffee, pre-workout, or a shake, so it fits into almost any routine.*
The research on PeakO₂ and Cordyceps militaris is promising, with some studies suggesting improvements in oxygen utilization and endurance, but the effects are generally modest and tend to show up after several weeks of consistent use. Think of this as a steady, long-term add-on rather than something you'll feel in your first workout.*
Two things to know. First, the 2,000mg is shared across six mushrooms, and the individual amounts aren't listed, so you're getting smaller doses of each rather than a full dose of any one mushroom. Second, the mushrooms are grown on organic oats and include mycelium, which is common, but it means not every gram is pure fruiting body. Neither is a dealbreaker, but if you want a specific mushroom like Lion's Mane at a researched dose, a single-ingredient product is the better choice. If you want a convenient, all-in-one adaptogen blend to support training and recovery without caffeine, PeakO₂ fits the bill.*
What is PeakO₂?
What’s PeakO₂ supposed to help with?
Which mushrooms are in PeakO₂?
How much PeakO₂ is in each serving?
Why are Cordyceps and King Trumpet included?
What does Lion’s Mane do?
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Supplement Facts
What's in Bucked Up - Peak O2
- Servings60
- Serving size1 scoop (2g)
- Per serving$0.45
Best for
- Recovery
- Immune Support
Key ingredients
- Cordyceps
- Reishi
- King Trumpet
- Shiitake
- Lion's Mane
- Turkey Tail
Diet & quality
- Vegan
- Vegetarian
- Gluten-Free
- Non-GMO
- USA-Made
- GMP Certified
Allergens: None of the top allergens
*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.
Read the label as text
Supplement Facts
Serving Size 1 Scoop (2g)
Servings Per Container 60
| Amount Per Serving | Amount | %DV |
|---|---|---|
| Calories | 10 | |
| Total Carbohydrate | 1 g | <1%‡ |
| PeakO2Cordyceps (Cordyceps militaris) (fruiting body), Reishi (Ganoderma lucidum) (fruiting body), King Trumpet (Pleurotus eryngii) (fruiting body), Shiitake (Lentinula edodes) (fruiting body), Lion's Mane (Hericium erinaceus) (fruiting body), Turkey Tail (Trametes versicolor) (fruiting body). | 2,000 mg | † |
‡ Percent Daily Value (DV) is based on a 2,000 calorie diet.
† Daily Value not established.
Other ingredients: None
Label shown: Unflavored
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How Bucked Up - Peak O2 compares
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|---|---|---|---|
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Price per serving (per pack for products sold in packs), from the lowest current price. Doses from each product's label.
