What is Amino-XR used for?

Amino-XR is used during or around training to support muscle preservation, endurance, hydration, and recovery. It is designed for intra-workout use, especially during intense or fasted training.

When should I take Amino-XR?

Amino-XR can be taken before, during, or immediately after training. It is most effective when sipped during workouts to support endurance and reduce muscle breakdown.

Can Amino-XR be taken during fasted training?

Yes, Amino-XR is ideal for fasted training as it provides amino acids that help preserve lean muscle without adding unnecessary calories.

Does Amino-XR help with muscle recovery?

Yes, Amino-XR provides essential amino acids that support muscle repair, reduce soreness, and improve recovery following training.

Is Amino-XR suitable for daily use?

Amino-XR is safe for daily use and can be consumed on training days or during periods of high activity to support muscle and performance.

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Nitric Oxide

£19.99

Nitric Oxide is OLLI’s stimulant-free pre-workout supplement, designed for men and women who want to improve training performance, muscle pump, and focus without caffeine or artificial stimulants. Built for consistent daily use, Nitric Oxide supports blood flow and nutrient delivery to working muscles, helping you train harder without crashes or sleep disruption.

Unlike high-stimulant pre-workouts, OLLI Nitric Oxide focuses on circulation, endurance, and training quality, making it suitable for morning or evening training and for anyone sensitive to caffeine. It is ideal for strength training, endurance sessions, and high-volume workouts where sustained performance matters.

440g / 80 servings

• Supports nitric oxide production and blood flow
• Enhances muscle pump and training performance
• Improves focus without stimulants or caffeine
• Suitable for evening and daily training
• Clean, non-stimulant pre-workout formula

Mix 1 scoop with 200–250 ml of water and consume 20–30 minutes before training. Nitric Oxide can also be stacked with other OLLI Performance products.

Clean, Effective Formulas

No fillers. No unnecessary additives. Just proven ingredients that work.

Mind & Body Support

Every product is designed to boost focus, energy, recovery, and overall wellbeing.

UK-Made Quality

Manufactured in the UK to the highest standards for safety, purity, and trust.

the best stimulant free Pre-workout on the market

Pre-workout.
Stimulant-free pre-workout for pump and performance.

OLLI Nitric Oxide is a caffeine-free pre-workout supplement designed to support blood flow, muscle pump, and training focus for men and women.

Train harder.
Stay in control.

Supports Blood Flow and Muscle Pump
Nitric Oxide supports circulation during training, helping deliver oxygen and nutrients to working muscles.

Improves Training Endurance
Enhanced blood flow supports sustained performance during longer or high-volume workouts.

Stimulant-Free Focus
Supports workout focus without caffeine, making it suitable for evening sessions or stimulant-sensitive individuals.

Consistent Daily Performance
Designed for regular use without tolerance buildup or crashes.

When to use
Olli Nitric Oxide

White scoop pouring protein powder against a black background

Pre-workout support.

Take before training to support circulation and workout quality.

Container of OLLI Nitric Oxide supplement with a glass of orange liquid on a kitchen counter.

Evening training.

Ideal for late sessions without affecting sleep.

Pair with Olli Creatine-XR

Clear water bottle held by a hand against a black background

Stacked performance routine.

Who Nitric Oxide is for

Gym-goers and strength trainers
Endurance and high-volume trainers
People training in the evening
Anyone avoiding stimulant-based pre-workouts

Who it’s not for

Those seeking caffeine or stimulant-driven
energy
Individuals not engaging in regular training
Anyone advised to avoid nitric oxide support

Person holding a container labeled 'Nitric Oxide' with a blurred background

How OLLI Nitric Oxide stands out

High-stimulant pre-workouts

Many pre-workouts rely on high
caffeine doses that can cause crashes and sleep disruption.

Under-dosed pump products

Some pump formulas lack sufficient
support for sustained blood flow.

Where OLLI Nitric Oxide wins

OLLI Nitric Oxide delivers stimulant-free performance support, focusing on circulation, endurance, and training quality without relying on caffeine or artificial stimulants.

Frequently Asked Questions
Nitric Oxide

A good pre-workout supplement should contain ingredients that boost energy, focus, and endurance, such as caffeine, beta-alanine, L-citrulline, and B-vitamins. These compounds help increase blood flow to muscles, improve performance, delay fatigue, and enhance mental alertness during training. OLLI pre-workout combines these key ingredients in optimal doses to provide a safe, effective boost without crashes, making it ideal for both strength and endurance workouts.

For maximum effectiveness, take your pre-workout 20–30 minutes before exercise. This timing allows active ingredients like caffeine and nitric oxide boosters to reach peak levels, enhancing energy, focus, and blood flow during your workout. Taking OLLI pre-workout at the right time ensures you get improved strength, endurance, and mental sharpness throughout your session.

Yes, pre-workout supplements like OLLI provide amino acids, creatine, and nitric oxide boosters, which help increase strength, power output, and endurance. Ingredients such as beta-alanine may delay muscle fatigue, while caffeine improves focus and alertness, allowing you to train harder and longer. Studies show that pre-workout supplementation can enhance resistance training performance and aerobic exercise output, making it an essential tool for both recreational and serious athletes.

Pre-workout supplements are generally safe for healthy adults when taken as directed. Common side effects can include jitters, mild nausea, or increased heart rate, primarily due to caffeine. OLLI pre-workout is formulated to provide a balanced boost without excessive stimulants, making it suitable for most adults. However, individuals who are sensitive to caffeine, pregnant, breastfeeding, or have cardiovascular conditions should consult a healthcare provider before use.

Yes, pre-workout supplements can benefit women and older adults, helping improve energy, focus, and performance during workouts. Women can use them to boost strength and endurance, while older adults may find pre-workout supplements helpful for maintaining muscle function and exercise capacity. OLLI pre-workout is formulated with safe, effective doses of performance-enhancing ingredients, making it versatile for adults of all ages and fitness levels.

Scientific Evidence

Nitric oxide has been widely studied
for its role in exercise performance, particularly its ability to support blood
flow and endurance. Research highlights the importance of nitric oxide pathways
in oxygen delivery and muscular efficiency during exercise.

The Claim: Nitric oxide supports improved exercise performance through
enhanced blood flow.

The Evidence: Research published in Sports Medicine highlights nitric
oxide’s role in exercise efficiency and endurance. Reference: Jones, A. M. (2014).
https://pubmed.ncbi.nlm.nih.gov/25004463/

The Claim: Improved blood flow contributes to endurance and performance.

The Evidence: A review in The Journal of Applied Physiology discusses
vascular function and exercise capacity. Reference: Casey, D. P., & Joyner,
M. J. (2012). https://pubmed.ncbi.nlm.nih.gov/22162535/

The Claim: Performance can be enhanced without stimulants by targeting
circulation.

The Evidence: Research indicates that non-stimulant performance supplements can
support training quality without affecting sleep. Reference: Spriet, L. L.
(2014). https://pubmed.ncbi.nlm.nih.gov/24791904/

Amino-XR

Protein-i6

Hydrate

Nitric Oxide

Amino-XR

Balance

Creatine-XR

Amino-XR

Balance

Creatine-XR