Rated 4.9/5 (5,900+ Reviews) Loved by 31,000+ Grapplers!
Oxygen Circuit™ Iron Strips
The Energy Formula for Grapplers Who Train Hard but Feel Flat by Round Three. Your cardio is there. Your technique is there. But somewhere in the middle of a hard session, something goes missing — the drive, the sharpness, the ability to push when it counts. Iron is the mineral your red blood cells use to carry oxygen to working muscle. When your levels drop from training load and sweat loss, your output does too. Every session you push through feeling sluggish is your body signaling a deficit you've been ignoring.
Chris A. — BJJ Purple Belt
Six weeks in. The back half of hard rounds doesn't feel like running on empty anymore. That's the difference.
⚡ The Oxygen Stack
Your cardio is there.
Your blood isn't keeping up.
Hard training depletes iron faster than most grapplers replace it. Without adequate iron, your red blood cells can't carry enough oxygen to working muscle — and you feel it in round three. Oxygen Circuit™ delivers two nutrients that work together at the foundation of your energy system.
Layer 1 · Oxygen Transport
Iron
Red Blood Cell Foundation
Red Blood Cell Foundation
Iron is the mineral your red blood cells use to bind oxygen and carry it to working muscle. Without enough iron, your body produces fewer functional red blood cells — meaning less oxygen reaches your muscles under load. Grapplers training 3–5x per week are particularly susceptible to depleted iron levels through sweat loss and physical demand. This is the layer most energy formulas skip entirely.
Iron (Ferric Saccharate) · 19mg
Layer 2 · Cell Formation
Folate
Red Blood Cell Production
Red Blood Cell Production
Folate (Vitamin B9) works alongside iron in the red blood cell production cycle. Iron without folate is an incomplete equation — folate supports the healthy cell formation process that determines how many functional red blood cells your body can actually build and maintain. Together, these two nutrients address the full oxygen delivery chain from production to transport.
Folate (Vitamin B9) · 400mcg
🔬 Built on Mechanism, Not Marketing
Why grapplers run low on iron
and never know it.
Iron deficiency doesn't feel like fatigue at first — it feels like your cardio has stalled. Like you're fit but flat. Like everyone else is recovering between rounds faster than you. That's the oxygen delivery problem. And sublingual delivery is why Oxygen Circuit™ addresses it faster than any capsule format on the market.
~15
Minutes to absorption
Sublingual delivery reaches systemic circulation in 15–20 minutes vs 45–60 for capsules. Take it before training and it's active by round one.
2
Nutrients, 1 complete system
Iron handles oxygen transport. Folate handles red blood cell production. You need both working together — not just one.
0
Water required.
Dissolves on your tongue in under 60 seconds. Raspberry flavor. Take it in the locker room, in the car, on the mat — no bottle needed.
Why sublingual iron works differently
1
Strip dissolves on the tongue in under 60 seconds
Active compounds absorb directly through the sublingual mucosa — the highly vascularized tissue under your tongue — into systemic circulation without gut transit.
2
Bypasses first-pass metabolism
Capsule iron passes through the gut and liver before reaching your bloodstream — and a significant portion is lost in that process. Sublingual absorption skips it entirely.
3
Active 15–20 minutes post-dissolution
Take one strip during warmup. By the time you're rolling, the formula is already in circulation. Most capsule users are still waiting for digestion to finish.
4
Daily use builds the baseline
Iron replenishment isn't a single-session fix — it builds over consistent daily use. One strip per day maintains the oxygen delivery system your training is constantly drawing from.
*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.
📋 What's Actually In It
Every ingredient.
Every dose. No fillers explained away.
Two active ingredients. No proprietary blends. No hidden doses. Here's exactly what's in each strip and why it's there.
🩸 Layer 1 · Oxygen Transport
Iron
Ferric Saccharate
The primary active ingredient. Iron is the mineral your red blood cells use to bind and carry oxygen to working muscle. Ferric Saccharate is a well-tolerated iron form — gentler on the gut than ferrous sulfate, which is the form most cheap supplements use. Grapplers training 3–5x per week consistently draw down iron reserves through sweat loss, microbleeding from contact sport, and the physical demands of high-output training. Daily replacement is not optional if you want your oxygen delivery system performing.
19mg
🔴 Layer 2 · Cell Production
Folate
Vitamin B9
Folate works alongside iron in the red blood cell production cycle. Iron handles oxygen transport — folate handles the upstream process of building the red blood cells that do the transporting. Without adequate folate, your body can't fully utilize the iron you're supplying. At 400mcg — the standard daily reference value — this dose supports normal cell formation as part of a balanced daily protocol.
400mcg
Why sublingual delivery changes the iron equation
Standard iron capsules dose higher because first-pass metabolism in the gut and liver destroys a significant portion before it reaches circulation — and iron in particular is known for poor gut absorption rates. Sublingual delivery bypasses the gut entirely. Active compounds absorb directly through the mucosal tissue under your tongue into systemic circulation. Faster onset, less waste, gentler on your stomach than oral iron tablets.
Other Ingredients: Pullulan, Cellulose, Lecithin, Raspberry Flavor, Monk Fruit Extract, Citric Acid, Medium-Chain Triglycerides, Xanthan Gum, Steviol Glycosides.
Serving Size: 1 Oral Strip · Servings Per Container: 30 · Raspberry Flavor
Serving Size: 1 Oral Strip · Servings Per Container: 30 · Raspberry Flavor
⚠ Important Safety Notice: Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under 6. Keep this product out of reach of children at all times. In case of accidental overdose, call a doctor or poison control center immediately. Do not exceed 1 strip per day.
💰 The Real Cost Comparison
Energy drinks are not
solving an iron problem.
Most grapplers who feel flat mid-session reach for caffeine. It masks the symptom for an hour. Oxygen Circuit™ addresses the actual mechanism — iron-supported oxygen delivery — for less than what most people spend on energy drinks in a week.
What Most Grapplers Use
$60–90/mo
Stimulant-based energy · Masks the symptom
Energy drinks (4x/week)$32–48/mo
Pre-workout (30 servings)$30–45/mo
Caffeine crash managementSleep debt
Iron / oxygen support✗ None
Addresses root cause✗ No
Oxygen Circuit™ Protocol
$26.99/mo
Subscribe & Save · 30 strips · Daily iron support
Iron (Ferric Saccharate)✓ 19mg daily
Folate (B9)✓ 400mcg daily
No caffeine / no crash✓ Clean
Addresses root cause✓ Yes
Stacks with Structural Reload™✓ Zero overlap
Annual savings vs energy drink habit
$396–756+
Prices based on average US retail. Subscription price shown. *These statements have not been evaluated by the FDA.
💬 Grappler Reviews
From grapplers who were
skeptical first.
Not influencers. Not paid placements. Just grapplers who tried it, kept buying, and said something about it.
★★★★★
BJJ Purple Belt · 4x/week
"Six weeks in. The back half of hard rounds doesn't feel like running on empty anymore. That's the difference."
Chris A.
BJJ / Grappling
★★★★★
BJJ Blue Belt · 3x/week
"I always thought I just had bad cardio. Turns out my cardio was fine — my oxygen delivery wasn't keeping up. Two months on this and my training partners are asking what I changed."
Jamie R.
BJJ / Submission Grappling
★★★★★
BJJ Brown Belt · 5x/week
"I stack this with Structural Reload. Physical recovery is handled, energy system is handled. I feel like I've addressed every layer now. Easiest daily habit I've built."
Alex S.
BJJ / No-Gi Grappling
★★★★★
BJJ Blue Belt · 3x/week
"I work a desk job and train evenings. The afternoon energy drag used to carry into training. After 30 days on Oxygen Circuit I noticed the drag was gone. Small thing, big difference when you're trying to keep up in live rounds."
David K.
BJJ / Grappling
★★★★★
BJJ Purple Belt · MMA Fighter
"The raspberry flavor actually makes it something I look forward to taking. But the reason I keep buying it is simple — my gas tank feels bigger. I'm not gassing out before my technique breaks down."
Carlos M.
BJJ / MMA
★★★★★
BJJ White Belt · 2x/week
"I started BJJ at 35 and the conditioning gap between me and people who've been training for years is real. Oxygen Circuit didn't close it overnight but after 60 days I'm keeping pace in rounds I used to die in."
Sarah L.
BJJ / Grappling
4.9★
Average Rating
5,900+
Verified Reviews
31k+
Grapplers Using the Protocol
83%
Reorder Rate at 60 Days
What Grapplers Reported After 60 Days
The supplement grapplers
actually keep buying.
After 60–90 days on the Oxygen Circuit™ protocol, grapplers who used it daily reported something specific: the energy drop in the back half of hard sessions got smaller. Not dramatic. Cumulative.
79%
Improved Late-Round Energy
Reported less energy drop in rounds 3–5 within 30 days of consistent daily use.
74%
Faster Between-Round Recovery
Reported breathing and heart rate returning to baseline faster between rounds.
83%
Continued the Protocol
Said they would continue using Oxygen Circuit™ after the 60-day evaluation — unprompted.
71%
Reduced General Fatigue
Reported feeling less physically depleted outside of training within 4 weeks of daily use.
⚖️ How It Stacks Up
Standard iron supplements
weren't built for athletes.
Most iron supplements are formulated for general deficiency — not for grapplers burning through iron at elevated rates. Here's what Oxygen Circuit™ does differently.
| Feature |
Oxygen Circuit™
|
Generic Iron Supplement
|
|---|---|---|
| Delivery Format | ✓ Sublingual Strip | Capsule / Tablet |
| Onset Speed | ✓ 15–20 min | 45–90 min digestion |
| Iron Form | ✓ Ferric Saccharate | Often Ferrous Sulfate |
| Gut Friendly | ✓ Bypasses gut entirely | Known GI side effects |
| Folate Included | ✓ 400mcg | ✗ Often excluded |
| No Water Required | ✓ Dissolves on tongue | ✗ Requires water |
| Sugar-Free | ✓ Monk Fruit + Stevia | Often sugar-coated |
| Built for Athletes | ✓ BJJ-specific positioning | General population |
| Lab Tested · Reforge Labs | ✓ | ✗ |
Built for grapplers, not the general population. Standard iron supplements are dosed and formatted for sedentary deficiency management. Oxygen Circuit™ is built around sublingual delivery and athlete iron demand — because what you lose on the mats requires a faster, more direct replacement pathway. Competitor comparison based on publicly available product information. Individual products vary.
Questions from Skeptics
Frequently Asked
Questions
If you've been skeptical about iron supplements or just never thought they applied to your training — these answers are for you.
Why would a grappler need an iron supplement?
Grapplers training 3–5x per week consistently draw down iron reserves through sweat loss, microbleeding from contact sport, and the elevated oxygen demands of high-output training. Iron is the mineral your red blood cells use to bind and carry oxygen to working muscle. When your levels drop, your output drops with them — and it doesn't feel like iron deficiency, it feels like bad cardio or poor recovery. Daily iron replacement isn't just for people with diagnosed deficiency. It's maintenance for anyone putting serious training load on their body.
Why Ferric Saccharate and not regular iron?
Most cheap iron supplements use Ferrous Sulfate — it's inexpensive but known for GI side effects including nausea and constipation. Ferric Saccharate is a gentler, well-tolerated form that's easier on the digestive system. Combined with sublingual delivery — which bypasses the gut entirely — Oxygen Circuit™ avoids the stomach discomfort that causes most people to stop taking iron supplements.
Why is Folate included?
Iron handles oxygen transport. Folate handles the upstream process — red blood cell production. Without adequate folate, your body can't fully build the red blood cells that the iron is supposed to supply. Most iron supplements stop at iron alone. Including Folate at 400mcg — the standard daily reference value — addresses the full oxygen delivery chain from production to transport.
How quickly will I feel a difference?
Iron replenishment builds over consistent daily use — it's not a session-specific spike. Most users report noticing a shift in late-round energy levels within 30–45 days of daily use. The sublingual delivery means each strip is absorbed faster than a capsule, but the meaningful energy shift is cumulative. Commit to 60 days before evaluating.
Can I stack Oxygen Circuit™ with Structural Reload™ and Neural Ignite™?
Yes — zero mechanism overlap across all three. Structural Reload™ handles the connective tissue and joint recovery layer. Neural Ignite™ handles cognitive performance. Oxygen Circuit™ handles the oxygen delivery and energy system layer. Same athlete, three different problems, three different formulas. The full Reforge Labs protocol.
When should I take it?
One strip daily, any time. On training days, take it 20–30 minutes before your session — sublingual absorption means it's active within 15–20 minutes. On rest days, take any time. Daily consistency matters more than timing.
Is there a money-back guarantee?
Yes. 30-day guarantee. Run the protocol consistently — one strip per day — and if you don't notice a difference, contact us for a full refund. No hoops.
Can I cancel my subscription anytime?
One click, any time. No phone calls, no retention scripts, no cancellation fees. Log in and cancel in under 30 seconds.
⚠ Important Safety Notice: Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under 6. Keep this product out of reach of children at all times. In case of accidental overdose, call a doctor or poison control center immediately. Do not exceed 1 strip per day.
*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. Oxygen Circuit™ is a dietary supplement, not a drug.
