Peak O2

Peak O2 , 120 Grams Unflavored

Maximize Human Power And Endurance*
Designed to Support Exercise Time to Exhaustion*
8.8  out of 10  (23 Reviews)
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Product Overview

  • Supports exercise time to exhaustion*
  • Promotes maximum power output*
  • Increases anaerobic Peak power output*
  • Supports oxygen unionization during exercise*
  • Organic, Non-GMO and Gluten Free!

Formulated for serious athletes seeking to support physical performance, Peako2 maximizes human power and endurance, it no wonder bodybuilders, team sport athletes, cross fitters, mma fighters, cyclists and strength and endurance enthusiast are all incorporating PEAKo2 into their supplement regimens. There is no quicker, simpler way to unleash the power within.*

Ratings & Reviews

Peak O2
Overall Rating
23 Ratings
Verified Buyer Rating
9 Ratings
Average Flavor Rating
1 Flavors
Top Rated Flavor
By clicking the button above, you agree to entering the Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
Apr 27, 2018
Verified Buyer
  • 1 Unflavored

If you are a runner or do any heavy cardio, give this a shot. Felt effects about a week in, I noticed I was able to take in alot more air and recovery after sprints was alot faster. Mixability is great but does taste earthy. Will keep buying this .

Dec 26, 2017
Verified Buyer
  • 10 Unflavored

This has been a staple of mine for over a year. Really helps with endurance and powering through my workouts! 1 scoop in my Pre and 1 scoop in my intra.

Sep 29, 2017
Verified Buyer
  • 10 Unflavored

I love how Peak02 makes cardio less grueling and improves overall cardiovascular capacity even on high rep exercises, supersets & dropsets. Been using it daily for the past 5 months and have made dramatic improvements on treadmill sprint time, manual treadmill max speed (14.6 on the Woodway Curve), elliptical, stairmaster & cardio bike endeavors. I highly recommend PeakO2 to everyone of all ages as it is all natural and benefits all sports and physical & cognitive activities.

Aug 27, 2017
  • 8 Unflavored

I noticed quicker recovery between sets when you do amrap with it

Jul 25, 2017
Verified Buyer
  • 9 Unflavored

I think the only way to see if this works or not is to isolate the product. I usually take this with a preworkout. After workout, I then add this to a protein shake. To be honest, I do not see any improvements whatsoever. I think people who see improvements are getting it from their preworkout or something else. Maybe I am taking this wrong? Maybe I need to put 2 scoops in my pre workout? I have two jars left so I might do that because this didn't do anything for me.

Jul 23, 2017
Verified Buyer

I definitely felt an increase in endurance and strength while taking Peak O2. Mind you I was having it with other supplements such as pre-workout, post-workout and protein.

May 01, 2017
Verified Buyer

Scoop before and after workout. For two months. Did nothing for me.

Apr 08, 2017
  • 10 Unflavored

Works within days to increase endurance and time-to-exhaustion. I've noticed faster strength gains lifting, as well. I take 2 scoops on workout/cardio days, 1 scoop on off days. I just ran for the first time outdoors, and already I beat my faster per mile time than all of last year's runs. I love the taste. I mix it in a shot glass with just plain 'ol water. I find it to have an earthy-mushroom taste that is delicious. I don't know what's with the hotdog/mac-n-cheese eaters around here that need to mix it in something.

Mar 29, 2017
Verified Buyer
  • 9 Unflavored

This product does what it says. I've noticed both increased endurance as well as increased power output/max strength. I have put up both rep PR's as well as max PR's since running Peak. Would recommend for anyone to try this product.

Jan 21, 2017
Verified Buyer
  • 10 Unflavored

The folks at Scivation/Primaforce were kind enough to include me in their Peak O2 promotion/trial. I received my package from them in November. So I started a workout journal here that started when I first tried Peak O2. Nothing was changed except adding Peak O2, I started with just taking one scoop with my intraworkout Xtend and after a couple workouts added it also to my PWO (Nitraflex). This I believe is the best combination for me. I have seen personal records consistantly and have felt better overall performance and endurance along the way. Mixability 6/10 This really means nothing to me, as I always shake my drinks before consuming any of them. Plus its not like it's chuncky, just gets a buildup on the bottom. Taste N/A/10 No taste here which makes it nice because I can add it to anything. Effectiveness 10/10 Does what it says it does as I can tell by my logs along with my general overall feeling of endurance during workouts. Price 10/10 For $20 its a must for me, plus right now it's 30% off on Thanks to NEBinAK, Mike McCandless, IlliniTrack800m and Scivationlead

Dec 29, 2016

I have used this as well as Xtend Perform for a couple of months now. I have started to notice a decrease in time to exhaustion mainly at two scoops daily when a scoop of each is used. Make sure you mix it in with something flavored as shake it up well as it settles at the bottom.

Dec 19, 2016
  • 5 Unflavored

I had the opportunity to try out Peak02. I used it preworkout (mixed in with my preworkout beverage) and postworkout (with a shake and creatine). During the weeks I tried out the Peak02, I only sipped on water intraworkout to really test out PEAK02. I was pleased with the ability my endurance while lifting along with muscle recovery after workouts. Strength and power increases were noticed as well. I did try the powder by itself in water once and it didnt taste to well so definitely would advise mixing it with something flavored. Overall, I would recommend to anyone looking to increase endurance power or strength, to add Peak02 to their arsenal

Dec 17, 2016
  • 6 Unflavored

I have taken this product for a few weeks and it has been a good addition to my daily supplement stack. The most notable effects are the extended workout time, and power output. I was able to perform additional reps and I felt like it took a lot longer to fatigue. My workouts were much longer and I had more energy without feeling drained. I also noticed increased strength which was great. The powder mixed ok but had a few particles that didn't fully mix. The flavor is supposed to be unflavored but I did not like it very much. It tasted like bitter plants when taken alone. I had to mix it with amino acids or a preworkout to mask the taste and it was ok that way. Overall a great addition to a supplement stack for anyone looking to decrease fatigue and increase strength and power!!

Dec 14, 2016
  • 10 Unflavored

I stack my peak O2 with my Extend Go for incredible focus and energy. Since adding Peak O2 to my supplementation in the past month I have added 55 pounds to my combined bench, squat, and deadlift. I highly recommend this to anyone looking for an increase in endurance and peak performance.

Dec 13, 2016
  • 7 Unflavored

Great product. Helps with endurance and peak strength. Great addition to a PWO that is lacking in endurance. Became a fan of this after using Xtend Perform. Another great product from a reputable company. Highly Recommended.

1 Size
120 Grams
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Price: $22.99  ($0.38 / Serving)
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Flavor Rating: 8.4

What's in PrimaForce Peak O2

Serving Size: 1 Scoop
Servings Per Container:60
Amount Per Serving % Daily Value
Calories 8       
Total Carbohydrate 1.5 g 1%*
Dietary Fiber .25 g 1%*
Sugars 0 g       
PEAK02™ Performance Blend 2,000mg *
Cordyceps (Cordyceps militaris), Reishi (Gandoderma lucidum), King Trumpet (Pleurotus eryngii), Shiitake (Lentinula edodes), Lion's Mane (Hericium erinaceus), Turkey Tail (Trametes versicolor)
* Daily Value not established

Directions For Peak O2: As a dietary supplement, mix one scoop into your favorite beverage. On training days, consume one (1) serving before and one (1) serving after exercise. On non-training days, consume two (2) servings throughout the day. For best results use two (2) servings per day.

Warnings: Not intended for use by persons under the age of 18. If you are pregnant or nursing or are taking any prescription medications, consult your healthcare professional before using this or any other dietary supplement product. Immediately discontinue use and consult your doctor if any adverse reactions occur. KEEP OUT OF REACH OF CHILDREN. STORE IN A COOL, DRY PLACE AND AVOID EXCESSIVE HEAT.

* 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.
Learn more about Cordyceps.
Check out other Improve Endurance Products.