My Honest CircO2 Nitric Oxide Booster Review (After 60 Days of Popping These Fizzy Tablets)

 

🟢My top tip: Save money and Get the Official CircO2 Nitric Oxide Booster

 

Okay, real talk for a second.

I never thought I'd be the kind of person who writes about supplements. Like, ever. My idea of "wellness" used to be drinking water between my coffees instead of just chugging caffeine until 4 PM and wondering why my heart was doing the cha-cha. But here we are, and I've got opinions.

So let me tell you about my whole CircO2 journey, because honestly? It's been a ride.

How I Even Stumbled Onto This Thing

It started with my dad. Of course it did. Doesn't every supplement story start with either a parent, a stubborn back injury, or a really aggressive Instagram ad?

For me, it was all three. (Yes, even the back thing. Long story involving a futon, hubris, and a very smug cat named Mr. Bingley.)

My dad, who is 68 and acts 45, had been raving about these little dissolvable tablets that supposedly help your body make more nitric oxide. And I'm sitting there like, "Dad, what on EARTH is nitric oxide and why do you sound like you're trying to sell me a NASCAR sponsorship?"

Turns out, nitric oxide is this molecule your body naturally produces that helps your blood vessels relax and open up — which means better circulation, better oxygen delivery, and (according to my dad, who said this with way too much enthusiasm at Thanksgiving) "more pep in your step." Yeah, he actually said that. To my entire extended family. With his mouth full of stuffing.

After he wouldn't stop bringing it up, I caved and ordered some.

First Impressions: The Fizz Was a Surprise

So when the bottle arrived, I expected pills. You know, those horse-sized capsules that make you reconsider all your life choices as you try to swallow them.

NOPE.

These are chewable/dissolvable tablets that fizz on your tongue. They taste like... hmm. Imagine if a berry-flavored Tums had a wild weekend with a SweeTart. That's the vibe. Not bad! Not amazing! Just kinda... pleasantly weird.

My quirk that I'll share here: I have a slightly embarrassing habit of narrating my morning routine like I'm hosting a cooking show. So picture me at 7 AM, holding a tablet, going "And NOW we introduce our nitric oxide booster to the palate..." while my partner pretends not to know me from across the kitchen.

The Test Strip Thing Is Kinda Cool, Not Gonna Lie

Here's something I didn't expect — the kit comes with these little test strips you put on your tongue to measure your nitric oxide levels. You stick it on, wait a few seconds, and it changes color.

My first test? Basically white. Which, according to the chart, meant my nitric oxide was, and I quote myself here, "embarrassingly low." Like, the kind of low where the strip felt personally let down by me.

I'm not gonna pretend this was some scientific lab experience, but it was honestly fun. Felt like a little science project every few weeks. My nerdy heart loved it.

So... Did It Actually Do Anything?

This is the part you came for, right? Let me break it down.

Week 1-2: Honestly? I felt nothing. I was getting ready to write this whole thing off as another supplement that promises the moon and delivers... a small rock. I almost quit.

Week 3-4: Something shifted. I noticed I wasn't doing my usual mid-afternoon slump face-plant on my desk. My workouts (which, full disclosure, are mostly me half-jogging while listening to true crime podcasts) felt... easier? Like I could actually breathe through them without sounding like a dying accordion.

Week 5-8: Okay, NOW we're talking. My hands and feet, which are usually approximately the temperature of a Popsicle in December, were actually warm. Like normal human warm. I forgot what that felt like, to be honest. I have Raynaud's-ish tendencies (never officially diagnosed, but my fingers turn whitish in cold rooms and it's super annoying), and this was a noticeable change.

Also? My retest strip turned a pretty solid pink. Look at me, biological overachiever.

The Stuff I Didn't Love

Let me be the friend who keeps it real:

• It's not cheap. I'll be honest, when I saw the price I made the same face I make when I see avocado toast pricing at brunch.
• The taste isn't for everyone. My sister tried one and said it tasted like "an angry grandma's hard candy." I disagree, but I respect her descriptive language.
• You have to be consistent. Skip a few days and you'll notice. I went on a weekend trip and forgot mine, and by Sunday I was dragging.
• Results vary, obviously. Like with anything, your mileage may differ. My friend Tara tried it and said she didn't notice much. So, you know, bodies are weird.

Would I Buy It Again?

Yeah. I would. I AM, actually — I just reordered.

I'm not saying this stuff is magic. I'm not saying it'll turn you into a marathon runner or replace your need for, you know, sleep and vegetables and not staying up until 1 AM watching baking shows. (Just me?)

But for someone like me — someone who sits at a desk too much, whose circulation has the energy of a sad balloon, and who needs that extra little oomph to get through the day — it's been a genuinely nice addition to my routine.

Final Verdict (and a Thank You to My Dad, I Guess)

If you've been feeling sluggish, cold-handed, foggy, or just generally like your "get up and go" got up and left, CircO2 might be worth a shot. Just don't expect overnight miracles. Give it the full 60 days, take the tests, see what happens.

And if you DO try it, please for the love of all things holy, do not bring it up at Thanksgiving with your mouth full of stuffing.

I'm looking at you, Dad.