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Core Labs NO3 Max PSI is a fully loaded nitric oxide formula built for maximum pump, vascularity, and muscle fullness.
This is not a basic pump add-on — it’s a multi-phase blood flow system that combines citrulline, multiple forms of arginine, performance boosters, and support nutrients to drive real training intensity and visible results.
If you want that tight, skin-stretching pump, insane vascularity, and fuller muscle look — this is where it starts.
• Multi-layer nitric oxide system (citrulline + 6 forms of arginine)
• Designed for extreme muscle pumps and vascularity
• Supports oxygen and nutrient delivery into muscles
• Includes performance and endurance support compounds
• Built for serious training, not casual workouts
| Ingredient | Amount |
|---|---|
| L-Citrulline | 1000 mg |
| Citrulline DL-Malate | 1000 mg |
| Ingredient | Amount |
|---|---|
| Arginine AKG | 400 mg |
| Inositol-Stabilised Arginine Silicate | 400 mg |
| Arginine Nitrate | 400 mg |
| Arginine Ethyl Ester | 200 mg |
| Arginine HCL | 100 mg |
| Arginine Ketoisocaproate (A-KIC) | 15 mg |
| Ingredient | Amount |
|---|---|
| Betaine Anhydrous | 500 mg |
| Fermented Beet Root | 300 mg |
| L-Norvaline | 150 mg |
| Quercetin Dihydrate | 100 mg |
| Methyl Pump™ | 10 mg |
| Ingredient | Amount |
|---|---|
| Vitamin B1 (Thiamine) | 10 mg |
| Vitamin B3 (Niacin) | 10 mg |
| Vitamin B6 (Pyridoxine) | 10 mg |
| Vitamin B9 (Folic Acid) | 1.2 mg |
| Vitamin B12 (Cyanocobalamin) | 5 mg |
| Vitamin D3 | 10 mg |
| Vitamin C (Ascorbic Acid) | 30 mg |
| Vitamin C Ester (Ascorbyl Palmitate) | 30 mg |
| Ingredient | Amount |
|---|---|
| Vanadyl Sulfate | 15 mcg |
Magnesium Stearate, Silicon Dioxide
This formula combines citrulline with multiple forms of arginine to increase nitric oxide production and improve vasodilation.
The result is enhanced blood flow to muscles, helping deliver more oxygen and nutrients, and boosting performance potential exactly where you need it.
Additional compounds like norvaline and beet root support longer-lasting pumps and improved endurance.
• Extreme muscle pumps and fullness
• Increased vascularity
• Better endurance and training output
• Enhanced nutrient delivery
• Stronger mind-muscle connection
Take before training.
Can be stacked with your pre-workout for maximum pump effect.
This is a serious pump formula built properly.
Not just one ingredient pretending to work — this is a full nitric oxide system that actually delivers that dense, hard pump you feel and see.
If your workouts feel flat, this fixes it.
• Guaranteed authentic Core Labs products
• Trusted hardcore supplement retailer
• Fast UK & EU shipping
• No customs for EU orders
What is Core Labs NO3 Max PSI used for?
It is designed to support muscle pumps, nitric oxide levels, and vascularity during workouts.
Does it contain stimulants?
No, this is a non-stimulant pump formula.
Can I stack it with a pre-workout?
Yes, it is ideal to combine with stimulant-based pre-workouts.
Who is it for?
Anyone looking to maximise pump, vascularity, and overall training intensity.
We offer a variety of sports supplements, including muscle-building products, pre-workout formulas, post-exercise recovery items, vitamins and minerals, amino acids, and more.
All our supplements are sourced from reputable manufacturers and undergo rigorous quality control to ensure safety and efficacy. However, we recommend consulting a healthcare professional before starting any new supplement regimen.
Choosing the right supplement depends on your fitness goals, dietary needs, and any existing health conditions. Our product descriptions provide detailed information to help you make an informed decision. Contact our customer support team for personalised advice if you need more clarification.
Placing an order is simple. Please browse our products, add the items you’d like to your cart, and proceed to checkout. You can pay using credit or debit cards, Klarna, or LayBuy.
We offer both domestic and international shipping. Orders are typically processed within 1-2 business days; however, shipping times may vary by location. For detailed information, please refer to our Shipping Policy page.
Once your order is shipped, you will receive a confirmation email with a tracking number. You can use this number to track your order on the carrier’s website.
We offer a carrier ‘s-day return policy for unopened and unused products. If you are unsatisfied with your purchase, please contact our customer support team to initiate a return. For more details, please visit our Return Policy page.
Yes, we regularly offer discounts and promotions on various products. Sign up for our newsletter or follow us on social media to stay updated on the latest deals.
Absolutely! Our team of experts is here to help. Contact us via our website, and we will provide personalised recommendations tailored to your fitness goals and dietary needs.
We offer a selection of vegan—and vegetarian-friendly supplements. For specific information, please check the product descriptions or use the filter options on our website to find suitable products.
Please email our customer support team at info@crossthelimits.co.uk or speak directly to our AI bot assistant. We aim to respond to all inquiries within 24 hours.
We offer wholesale options for gyms, fitness centres, and retailers. For more information, please contact our wholesale department at wholesale@crossthelimits.co.uk.
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We dispatch parcels to the EU every Friday. Your order must be placed by 10 AM on Friday to be included in that week’s shipment. If you order earlier in the week (e.g. on Sunday), your parcel will stay in the UK until Thursday, when it is transferred to our EU fulfilment centre. Once it arrives (usually within 5-7 days), we will send it via DPD, and you will receive your tracking details via email. Please note that the journey from the UK to the EU warehouse does not include tracking—tracking is only provided once your parcel is dispatched from the EU warehouse.
First, you’ll need to register for an account with our store to earn your points. Our points system lets you earn points on every purchase. For every £1 spent on our website, you earn 1 point. For every 100 points, you get £1 in store credit.
For example, if you order £100, you will earn 100 points (equivalent to £1), which you can redeem on your next order.
Yes! You can pay for your supplements using Bitcoin (BTC), Ethereum (ETH), USDT, and many other cryptocurrencies via our secure payment partner, NOWPayments.
To ensure reliable delivery and avoid customs issues, all UK orders are shipped via a consolidated weekly route to our EU hub.
This method guarantees:
Orders placed after Friday may be included in the following dispatch window.
Delivery time can be up to 2–2.5 weeks, depending on order timing.
All parcels are delivered via DPD with EU tracking provided after dispatch.
