There are not a lot of high-quality endurance enhancers on the market. I mean, a couple of good ones are getting released every now and then, but they are not nearly as common as, let's say, pre-workout supplements. But still, the folks over at PrimaForce decided to give it a try and come up with a brilliant stamina enhancing solution. The name is Peak O2 and there is no doubt it features a unique mixture of ingredients that could be worth checking out…
And that's exactly what I am going to do. Together, we will go through some of the most important aspects (in terms of ingredients, dosage and efficiency) of this supplement, just to see what does it bring to the table. Let's jump straight to action!
Peak 02 Benefits
As some of you already might know, 02 uptake is among the crucial factors when it comes to your endurance. If your lungs cannot supply enough oxygen to your muscles during demanding workout routines, you will end up feeling a lot more fatigued and you will be highly unlikely to finish your routine without the shortage of breath. In the extreme cases of not getting enough oxygen during your workouts, you might even blackout if you're pushing your body too hard… And that's where Peak O2 comes in. Its mixture of ingredients is able to provide you with plenty additional oxygen uptake which will trigger receptors in your body and allow your muscles to gain more O2 during your workouts. This will result in an enhanced endurance especially if taken directly prior to your workouts. To avoid the shortage of breath afterward, the dosage instructions suggest you take another scoop post workout.
Peak 02 Ingredients
Before we start analyzing the most important ingredients of this supplement, make sure you take a closer look at the full list:
This type of fungus is used to treat all sorts of health issues such as coughs, kidney disorders, dizziness and even opium addiction. Still, none of these issues are the reason for its addition in Peak 02. The reason why we can find it in this supplement is its athletic performance enhancing traits. Even though there are no research studies to back it up, Cordyceps is still widely used as a stimulant that can increase energy, reduce fatigue and greatly enhance one's stamina. 
Another type of fungus which also has a plethora of beneficial effects, ranging from treating viral infections, swine flu and even asthma and bronchitis. Still, just like Cordyceps, Reishi mushroom is also known for its stimulant effects as well, allowing its users to combat fatigue quicker while reducing stress.
This type of fungus is widely popular across the world. It is most commonly used as food but people often use it for lowering blood cholesterol levels and as an anti-aging compound.
Peak 02 Side Effects
While just a small fraction of Peak O2 users complained about side effects, we are still obliged to inform you about them. The first potentially dangerous one is nose bleed, followed up by low blood pressure.
Both of them are really not that frequent, but if you end up experiencing them, you should probably half your doses just in case.
Peak 02 Reviews
Yes, there are plenty of reviews for Peak 02. People are generally saying good things about it, but here, see for yourself:
“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.”
“This product has treated me well! I have noticed a lot more power during my max days and even just on my high volume days.”
“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.”
As you can see, users are praising Peak 02 because of its endurance enhancing effects. This was expected as most (if not all) of its ingredients are known to prevent fatigue and increase athletic performance.
Peak 02 Conclusion
In the end, there isn't much else to say about Peak O2 by PrimaForce. From all I've had the chance to see, it is indeed a fairly good endurance enhancer and will surely make its place in the diets of thousands of people from all over the world. If you are one of them and you would like to purchase your own bottle of Peak 02, I've left a link down below with a serious discount.