ProveIt Supplements

Independent, evidence-based supplement analysis.

✓ Not Sponsored

✓ No Paid Reviews

✓ Science-Based

Company

  • About Us
  • Our Methodology
  • Contact
  • Blog
  • Authors

Legal

  • Privacy Policy
  • Terms of Service
  • Medical Disclaimer
  • Affiliate Disclosure

Resources

  • All Categories
  • Ingredient Database
  • Browse Supplements
  • FAQ

© 2025 ProveIt Supplements. All rights reserved.

Medical Disclaimer: The information provided is for educational purposes only and is not intended as medical advice. Always consult with a qualified healthcare professional before starting any supplement regimen.

Prove It
Browse SupplementsBlogAuthorsAboutMethodologyFAQ
Get Your Personalized Supplement StackSupplement Stack Quiz
Menu
HomeBrowse SupplementsBlogAuthorsAboutMethodologyFAQ
Back

Peak O2

Also known as: performance mushrooms, Cordyceps militaris, adaptogen mushroom blend, PeakO2

Overview

PeakO2 is a proprietary blend of six adaptogenic mushrooms, primarily featuring *Cordyceps militaris*, *Reishi*, *Chaga*, *Lion's Mane*, *Turkey Tail*, and *Shiitake*. This blend is designed to enhance athletic performance through improved oxygen utilization and increased endurance and power. PeakO2 is commonly incorporated into pre-workout and amino acid products. Although it boasts potential benefits, research remains limited, largely rooted in manufacturer-sponsored studies and anecdotal evidence. Overall, the evidence surrounding PeakO2's effects is emerging, lacking the robust validation of extensive peer-reviewed research.

Benefits

PeakO2 is claimed to improve peak power, endurance, and VO2 max. However, these benefits are not strongly supported by independent studies. The blend may offer antioxidant effects conducive to reducing oxidative stress, particularly beneficial for athletes looking to enhance performance. Reports suggest that users may start experiencing benefits within a few days to weeks, though these claims lack independent verification, illustrating a need for further scientific validation.

How it works

PeakO2 potentially increases oxygen uptake and utilization, which may enhance ATP regeneration in muscle cells. This improved oxygen kinetics could contribute to better muscle function and exercise performance. However, the specific molecular targets and detailed biological pathways remain inadequately defined in the current literature.

Side effects

The safety profile of PeakO2 is generally regarded as favorable, with limited documentation on adverse effects. Common side effects occur in less than 5% of the population, and rare side effects have not been reported. There is a notable absence of research into potential drug interactions or contraindications. Special considerations apply to pregnant or breastfeeding women, as data regarding safety in these populations is insufficient, warranting consultation with healthcare providers.

Dosage

The manufacturer recommends a minimum effective dose of 1g per day, with optimal dosages ranging from 1g to 4g daily. Maximum safe doses have not been established. It is suggested to take PeakO2 before workouts to optimize performance, with specific forms including capsules or powders. However, detailed studies on absorption factors remain lacking.

FAQs

How quickly does PeakO2 work?

The manufacturer claims benefits can be experienced within days to weeks, although this lack independent verification.

Is PeakO2 safe?

Generally considered safe, it is advised to consult with a healthcare provider for personal safety assessments.

When should I take PeakO2?

It is recommended to take it before workouts for performance enhancement.

What results can I expect?

Users may expect improved endurance and power, though evidence supporting these outcomes is limited.

Is PeakO2 more effective than beta-alanine?

There is a common misconception that PeakO2 is more effective than beta-alanine, but strong evidence for this claim is lacking.

Research Sources

  • https://compoundsolutions.com/peako2-the-better-beta-alanine/ – This source provides an overview of PeakO2's formulation and its purported benefits, highlighting its potential effectiveness as an ergogenic aid for athletes.
  • https://www.nutritioninsight.com/news/tsis-pre-workout-supplement-peak-atp-passes-systematic-review.html – The article discusses recent research on pre-workout supplements, including findings relevant to PeakO2, particularly regarding performance enhancement.
  • https://research.vu.nl/ws/files/112309318/164205.pdf – This document presents research findings about PeakO2 and its effects on athletic performance, though details on methodology and results are limited.
  • https://nutrabio.com/blogs/endurelite/how-medicinal-mushrooms-can-help-maximize-your-mileage – This blog reviews the benefits of medicinal mushrooms, including those found in PeakO2, discussing their potential roles in enhancing endurance.
  • https://www.researchgate.net/figure/Peak-O2-pulse-increases-to-a-greater-extent-following-HI-than-LO-Significant-p005_fig7_249967468 – ResearchGate provides a figure illustrating the effects of PeakO2 on pulse and performance metrics, shedding light on its potential impact in high-intensity versus low-intensity scenarios.

Supplements Containing Peak O2

Pump-Ocalypse Apple by Bucked Up
80

Pump-Ocalypse Apple

Bucked Up

Score: 80/100
Pump + Focus Razzle Berry by Like A Pro Supplements
70

Pump + Focus Razzle Berry

Like A Pro Supplements

Score: 70/100
Beet Root Powder + Black Cherry Flavor by Havasu Nutrition
73

Beet Root Powder + Black Cherry Flavor

Havasu Nutrition

Score: 73/100
Peak Power Mushroom Complex by Fresh Healthcare
83

Peak Power Mushroom Complex

Fresh Healthcare

Score: 83/100
Rage Mixed Berry by EA Enhanced
70

Rage Mixed Berry

EA Enhanced

Score: 70/100
Castle Bravo Cereza Limon by Merica Labz
60

Castle Bravo Cereza Limon

Merica Labz

Score: 60/100
Castle Bravo Fairground Apple by Merica Labz
60

Castle Bravo Fairground Apple

Merica Labz

Score: 60/100
Castle Bravo Mango Foxtrot by Merica Labz
55

Castle Bravo Mango Foxtrot

Merica Labz

Score: 55/100
Strength Gainz Lemon Lime by BPI Sports
70

Strength Gainz Lemon Lime

BPI Sports

Score: 70/100
Strength Gainz Tropical Punch by BPI Sports
83

Strength Gainz Tropical Punch

BPI Sports

Score: 83/100
Best BCAA Recharged Snow Cone by BPI Sports
78

Best BCAA Recharged Snow Cone

BPI Sports

Score: 78/100
Best BCAA Recharged Watermelon by BPI Sports
75

Best BCAA Recharged Watermelon

BPI Sports

Score: 75/100

Recommended Articles

Top Ingredients for Healthy Weight Management

Top Ingredients for Healthy Weight Management

Dietary fiber, protein, omega-3 fatty acids, and water are crucial for managing a healthy weight.

Top Anti-Inflammatory Supplement Ingredients

Top Anti-Inflammatory Supplement Ingredients

Curcumin, omega-3 fatty acids, CBD, and Vitamin D are proven to effectively reduce chronic inflammation.

L-Theanine Dosage for Focus: Avoid Drowsiness

L-Theanine Dosage for Focus: Avoid Drowsiness

200-400mg daily of L-theanine enhances focus without causing drowsiness, with benefits amplified when combined with caffeine.

Top Nutrients for Radiant Skin: What You Need to Know

Top Nutrients for Radiant Skin: What You Need to Know

A balanced diet rich in vitamins A, C, D, E, antioxidants, omega-3 fatty acids, and zinc is essential for healthy skin.