Vitality Pro

GlyNAC

GlyNAC combines glycine and N-acetylcysteine to provide the building blocks for glutathione, the body’s master antioxidant and detoxifier. Research suggests that taking these amino acids together enhances glutathione production more effectively than taking them separately.

Features

  • 700mg per capsule
  • Take 2-3 per day
  • 350mg Glycine + 350mg N-Acetylcysteine
  • Vegan friendly 
  • Free from common allergens

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Third-Party Tested

Date • Batch # • Results

Purity results include Heavy Metals

Current Batch:

July 2026

•

Glycine · 2600448:

100% Purity and Microbiology

NAC · 2600448:

98.8% Purity and Microbiology

Previous results:

December 2025

•

Glycine · 2501129:

98.7% Purity and Microbiology

NAC · 2501129:

101.2% Purity and Microbiology

August 2024

•

Glycine · 2400213:

99.7% Purity and Microbiology

NAC · 2400213:

99.1% Purity and Microbiology

April 2024

•

Glycine · 202430411:

99.6% Purity and Microbiology

NAC · 2301112:

99.1% Purity and Microbiology

September 2023

•

Glycine · 09062023:

99.4% Purity

NAC · 09062023:

99.1% Purity

November 2022

•

Glycine · 11032022:

99.8% Purity

NAC · 11032022:

95.7% Purity

GMP Certified Facility

Our supplements are manufactured in the UK, at facilities in Oxford and the North of England, following Good Manufacturing Practice (GMP) standards.

GMP sets requirements for hygiene, production, quality control, and traceability, helping ensure supplements are consistently manufactured under controlled conditions.

Our manufacturing partners hold independently issued GMP certificates. Rather than simply asking you to take our word for it, we've made these available below for you to review.

Our UK Manufacturers' GMP Certificates

Issued by Eurofins and SGS.

Manufacturer 1

Manufacturer 2

Manufacturer names have been redacted for commercial confidentiality.

ISO Quality Managed

Vitality Pro is independently certified to ISO 9001:2015, an internationally recognised standard for quality management systems.

Maintaining this certification requires ongoing monitoring, documented checks, regular reporting and independent audits. These processes help identify areas for improvement, ensure issues are addressed, and continually strengthen the systems and controls behind our supplements. It's a commitment to quality that must be demonstrated and maintained, not simply claimed.

We believe quality should be independently verified, not simply claimed. You can view our ISO 9001:2015 certificate below.

Our ISO 9001:2015 Certificate

View Our Certificate

Ingredients

View supplement label

Capsules Per Container: 90

Amount Per Capsule Amount %NRV
Glycine 350mg *
N-Acetyl Cysteine (NAC) 350mg *

Nutrient Reference Value not established*

Suitable for vegans. Contains no GMOs, common allergens, artificial colours, preservatives or flavours.

Storage & Stability

To maintain the potency and quality of your GlyNAC supplements, store them in a cool (20°C-25°C), dry place and away from light.

Quality Standards

Manufacturing: All products are made to GMP standards and have been quality-managed in accordance with the UK standard ISO 9001:2015. Third-party tested: To ensure the highest purity and maximum effectiveness, each new batch of products undergoes third-party testing by ISO 17025 accreditated Micro Quality Labs. You can view all testing certificates at www.vitality-pro.com/batch-testing.

Safety & Warnings

Do not exceed the recommended daily dose. Food supplements should not replace a varied and balanced diet and a healthy lifestyle. If you are pregnant, breastfeeding, under 18 or taking any medication, consult a doctor before use. Stop use if adverse reactions occur.

Interactions: GlyNAC may have antiplatelet and anticoagulant effects, potentially increasing the risk of bleeding when taken with blood thinners such as Warfarin and Clopidogrel. GlyNAC may also increase the effects of the heart medications Nitroglycerin and Isosorbide, as well as the antifungal medication Oxiconazole. If you are taking these medications or any other medication, please first speak with your doctor before adding GlyNAC to your supplement regime.

For further information regarding any other potential drug and supplement interactions with GlyNAC please see the individual ingredient profiles on Drug Bank using the links below.* Allergy: This product does not contain any common allergens; however, it should not be used by anyone with a history of hypersensitivity to its ingredients or those taking medications that may interact with it.

Pregnancy: If pregnant, consult your health professional before using this product.

*Drug Bank is an independent website that lists potential interactions between the ingredients in GlyNAC and other medications and supplements. It may not, however, list all known possible interactions. If you are taking any medications or supplements that you feel may interact negatively with Apigenin, please speak with your doctor before using this product.
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Key Studies to Consider

While individual results may vary due to personal health conditions, genetics, and lifestyle choices, we guarantee that the supplements you receive are made with ingredients of the highest purity, similar to those used in scientific studies, to ensure maximum results.

Glutathione Production

 Supplementing Glycine and N-Acetylcysteine (GlyNAC) in Older Adults Improves Glutathione Deficiency, Oxidative Stress, Mitochondrial Dysfunction, Inflammation, Physical Function, and Aging Hallmarks – Randomised Control Trial

Dosage: GlyNAC (Glycine and N-Acetylcysteine) supplementation for 16 weeks in older adults

Outcome: Improvement in glutathione production, reduced oxidative stress, improved mitochondrial function, and better physical function in older adults.

Summary: GlyNAC supplementation for 16 weeks helped older adults increase glutathione levels, which in turn reduced oxidative stress and improved various ageing-related issues like mitochondrial dysfunction and physical decline.

Read more

Cellular Health

 GlyNAC (Glycine and N-Acetylcysteine) Supplementation Improves Impaired Mitochondrial Fuel Oxidation and Lowers Insulin Resistance in Patients with Type 2 Diabetes – Pilot Study

Dosage: GlyNAC (Glycine and N-Acetylcysteine) supplementation for 14 days

Outcome: Improvement in mitochondrial function and reduction in insulin resistance

Summary: In people with type 2 diabetes, a 14-day course of GlyNAC (a combination of two supplements) helped improve the function of mitochondria (the energy-producing parts of cells) and reduced insulin resistance, making it easier for their bodies to control blood sugar levels.

Read more

Longevity

 GlyNAC (Glycine and N-Acetylcysteine) Supplementation in Mice Increases Length of Life by Correcting Glutathione Deficiency, Oxidative Stress, Mitochondrial Dysfunction, Abnormalities in Mitophagy and Nutrient Sensing, and Genomic Damage – Preclinical Animal Study

Dosage: GlyNAC supplementation in mice

Outcome: Increased lifespan by 24%

Summary: Giving mice a GlyNAC supplement made them live 24% longer. It worked by fixing issues related to ageing, like damage from oxidative stress, mitochondrial problems, and decreases in a protective antioxidant called glutathione. This suggests that GlyNAC could help improve both lifespan and health quality, showing the potential for further research in nutritional supplements to enhance longevity.

Read more

 Supplementing Glycine and N-Acetylcysteine (GlyNAC) in Older Adults Improves Glutathione Deficiency, Oxidative Stress, Mitochondrial Dysfunction, Inflammation, Physical Function, and Aging Hallmarks -Randomised Clinical Trial

Dosage: 100 mg/kg/day of glycine and 100 mg/kg/day of N-acetylcysteine (GlyNAC) for 16 weeks

Outcome: Improvements in glutathione levels, oxidative stress, mitochondrial function, inflammation, physical performance, and markers of ageing

Summary: GlyNAC supplementation in older adults over 16 weeks improved multiple markers of ageing, including better physical function, reduced oxidative stress, and improved mitochondrial and cellular health. No significant changes were seen in the placebo group.

Read more

Antioxidant

 Glycine and N-acetylcysteine (GlyNAC) supplementation in older adults improves various health markers: Results of a pilot clinical trial – Pilot Clinical Trial

Dosage: GlyNAC supplementation for 24 weeks

Outcome: Improvement in antioxidant levels, reduction in oxidative stress and inflammation, better mitochondrial function, insulin sensitivity, muscle strength, cognition, and overall health markers.

Summary: This study found that taking a supplement combining glycine and N-acetylcysteine for six months helped older adults by boosting their antioxidant levels, reducing stress on their cells, improving their insulin sensitivity, and enhancing muscle strength and brain function. However, these benefits decreased after stopping the supplement for three months.

Read more

Brain Health

 GlyNAC (Glycine and N-Acetylcysteine) Supplementation in Old Mice Improves Brain Health – Preclinical Animal Study

Intervention: GlyNAC supplementation for 8 weeks

Outcome: Improved cognitive function and brain health

Summary: In older mice, supplementing with GlyNAC for 8 weeks improved brain health and reversed age-related cognitive decline by fixing brain issues like antioxidant levels, energy production, and inflammation. This suggests GlyNAC could help keep the brain healthy as it ages.

Read more

 N-acetylcysteine ameliorates chemotherapy-induced impaired anxiety and depression-like behaviors by regulating inflammation, oxidative and cholinergic status, and BDNF release – Animal study

Dosage: Methotrexate (chemotherapy drug) at 100 mg/kg once, followed by N-acetylcysteine (NAC) at 500 mg/kg in two doses

Outcome: Improvement in anxiety and depression-like behaviors in rats

Summary: This study found that N-acetylcysteine helped improve mood problems like anxiety and depression in rats caused by chemotherapy. NAC works by reducing inflammation, balancing chemicals in the brain, and improving the body’s antioxidant levels.

Read more

 Effects of N-acetylcysteine on Oxidative Stress Biomarkers, Depression, and Anxiety Symptoms in Patients with Multiple Sclerosis – Clinical Trial

Dosage: 600 mg of N-acetylcysteine (NAC) taken twice daily for 8 weeks

Outcome: Decrease in markers of oxidative stress and anxiety symptoms; no significant change in depression symptoms

Summary: This study found that taking NAC twice a day for two months helped reduce stress markers in the body and improved feelings of anxiety in people with multiple sclerosis. However, it didn’t significantly help with depression symptoms.

Read more

Everything You Need To Know About GlyNAC

GlyNAC is a combination of glycine and N-acetylcysteine (NAC), two amino acid precursors required for the production of glutathione, the body’s most powerful antioxidant. Glutathione plays an essential role in protecting cells from oxidative stress and helping detoxify the body.

GlyNAC is converted to glutathione through a series of biochemical steps involving its two components, glycine and N-acetylcysteine (NAC), plus glutamate, which is typically highly present in cells.

Once glutathione is formed, it functions by neutralising reactive oxygen species (ROS), harmful molecules generated as byproducts of normal biological processes and environmental stressors. It does this through a process called a redox reaction. It donates an electron to unstable ROS, stabilising them and converting harmful ROS into water or other less harmful molecules. In addition to its antioxidant role, glutathione is crucial for detoxification. Glutathione binds to toxins in the liver and helps convert them into water-soluble forms, making them easier for the body to eliminate.

Healthy glutathione levels are essential for neutralising reactive oxygen species (ROS) and maintaining cellular health. However, with age, stress, or disease, glutathione levels decline, making the body more vulnerable to oxidative stress and toxin buildup, which leads to cellular damage.

The liver relies on glutathione for detoxification, particularly during Phase II. This is where glutathione binds to harmful substances like heavy metals and pesticides, making them water-soluble for safe elimination. Declines in glutathione impair detoxification, contributing to toxin accumulation, oxidative stress, and inflammation.

As we age, glutathione levels decline due to reduced availability of its precursors, increased demand, depleting reserves, and less efficient recycling. GlyNAC may protect cells from oxidative damage by boosting glutathione, which supports cellular health and enhances detoxification. Studies suggest that higher glutathione levels are linked to greater longevity and a lower risk of age-related diseases.

Consider the following statements. If you find one or more relatable, GlyNAC might be the support you’ve been searching for:

  • I’m interested in boosting my antioxidant levels and read that GlyNAC supports glutathione production.
  • Supporting my healthy ageing has become a priority, and I’ve read that GlyNAC can help reduce oxidative stress.
  • I often feel low on energy, and I’d like to support my mitochondrial function and endurance.
  • I’m looking for natural ways to improve cognitive function and overall health.
  • I’m exploring supplements that may help manage inflammation and GlyNAC’s effects on cellular repair and protection interest me.
  • A health professional has recommended GlyNAC to me.
Made to GMP Standards
ISO 9001 Certified UK Company
Independent Testing for Purity

Transparent Testing

Every batch is independently tested for identity, potency, contaminants, heavy metals, and microbial markers.

View all product tests

GlyNAC test results

Date • Batch # • Results

Purity results include Heavy Metals

Current Batch:

July 2026

•

Glycine · 2600448:

100% Purity and Microbiology

NAC · 2600448:

98.8% Purity and Microbiology

Previous results:

December 2025

•

Glycine · 2501129:

98.7% Purity and Microbiology

NAC · 2501129:

101.2% Purity and Microbiology

August 2024

•

Glycine · 2400213:

99.7% Purity and Microbiology

NAC · 2400213:

99.1% Purity and Microbiology

April 2024

•

Glycine · 202430411:

99.6% Purity and Microbiology

NAC · 2301112:

99.1% Purity and Microbiology

September 2023

•

Glycine · 09062023:

99.4% Purity

NAC · 09062023:

99.1% Purity

November 2022

•

Glycine · 11032022:

99.8% Purity

NAC · 11032022:

95.7% Purity

Frequently Asked Questions

As NAC is an organic compound containing sulphur, GlyNAC will have an odour. This is completely normal.

NAC is taken to support the body’s production of the anti-oxidant Glutathione. However, the amino acid Glycine is also required to produce this antioxidant, and it is often deficient in the diet. Combining these two amino acids gives the body the building blocks it needs for optimal glutathione production.

The answer depends. Some people have genetic issues that prevent them from making optimal amounts of glutathione in which case a reduced glutathione supplement may be the better option. However many people experience significant side effects from supplemental glutathione. In this case, GlyNAC supplementation along with other anti-oxidants such as Vitamin E and Selenium is recommended.

GlyNAC has been used in studies at doses as high as 7.2 grams a day; however, this was done in a controlled setting and for a short period of time. Dosages of 1.4 to 2.1 grams (2-3 capsules) have a better safety record and are also less likely to result in side effects. To assess your tolerance, we suggest starting with one capsule a day and working up from there.

Whilst uncommon, side effects of GlyNAC include nausea, fatigue, upset stomach, and headache. If you experience side effects while taking GlyNAC, we suggest that you lower your dosage.

Certainty of purity.

We are committed to the following quality controls to ensure consistency, reliability, and transparency in every product. Our goal is to raise industry standards and give you clear reasons to trust what you’re taking.
  • GMP Certified Facility

    All products are made to cGMP (current Good Manufacturing Practice) standards, the global benchmark for supplement quality. GMP standards ensure strict control over how our supplements are produced, covering everything from cleanliness to documentation and quality control. Every step is monitored to guarantee consistency and safety in every batch, so you receive the same high-quality product every time.

  • Third-Party Tested

    At the foundation of what we offer is certainty of product quality through consistent third-party testing, specifically for purity.

  • ISO Quality Managed

    ISO 9001:2015 standards are an internationally recognised framework for effective quality management. This accreditation means we follow a structured system of continuous improvement, always refining our processes to enhance product consistency and customer satisfaction. ISO accreditation ensures that every aspect of our operations, from production to customer service, is optimised. This means better oversight, reduced risk of errors, and a clear focus on delivering consistent results.

  • Transparency

    We believe you should have full clarity about what you’re putting in your body and the steps we take to ensure the quality of our supplements. That’s why we are transparent and open about every part of our process.

  • GMP Certified Facility

    Droplets

    Our supplements are manufactured in the UK, at facilities in Oxford and the North of England, following Good Manufacturing Practice (GMP) standards.

    GMP sets requirements for hygiene, production, quality control, and traceability, helping ensure supplements are consistently manufactured under controlled conditions.

    Our manufacturing partners hold independently issued GMP certificates. Rather than simply asking you to take our word for it, we've made these available below for you to review.

    Our UK Manufacturers' GMP Certificates

    Issued by Eurofins and SGS.

    Manufacturer 1

    Manufacturer 2

    Manufacturer names have been redacted for commercial confidentiality.

    Third-Party Tested

    Date • Batch # • Results

    Purity results include Heavy Metals

    Current Batch:

    July 2026

    •

    Glycine · 2600448:

    100% Purity and Microbiology

    NAC · 2600448:

    98.8% Purity and Microbiology

    Previous results:

    December 2025

    •

    Glycine · 2501129:

    98.7% Purity and Microbiology

    NAC · 2501129:

    101.2% Purity and Microbiology

    August 2024

    •

    Glycine · 2400213:

    99.7% Purity and Microbiology

    NAC · 2400213:

    99.1% Purity and Microbiology

    April 2024

    •

    Glycine · 202430411:

    99.6% Purity and Microbiology

    NAC · 2301112:

    99.1% Purity and Microbiology

    September 2023

    •

    Glycine · 09062023:

    99.4% Purity

    NAC · 09062023:

    99.1% Purity

    November 2022

    •

    Glycine · 11032022:

    99.8% Purity

    NAC · 11032022:

    95.7% Purity

    ISO Quality Managed

    Vitality Pro is independently certified to ISO 9001:2015, an internationally recognised standard for quality management systems.

    Maintaining this certification requires ongoing monitoring, documented checks, regular reporting and independent audits. These processes help identify areas for improvement, ensure issues are addressed, and continually strengthen the systems and controls behind our supplements. It's a commitment to quality that must be demonstrated and maintained, not simply claimed.

    We believe quality should be independently verified, not simply claimed. You can view our ISO 9001:2015 certificate below.

    Our ISO 9001:2015 Certificate

    View Our Certificate

    Transparency

    We believe you should have full clarity about what you’re putting in your body and the steps we take to ensure the quality of our supplements. That’s why we are transparent and open about every part of our process.

    Transparency means we share all the details that matter—how our products are made, tested, and verified. From publishing third-party test results to offering clear ingredient labels, we provide you with the information you need to make informed choices about your supplements. Nothing is hidden, and every product comes with full accountability.

    In a world where many supplement companies keep you in the dark, we believe you deserve complete honesty. Being transparent allows you to trust that you’re getting exactly what you expect—pure, tested supplements without hidden risks. It’s about empowering you to make confident decisions and focus on your health journey without second-guessing the products you take.

    Trusted By Professionals & Industry Experts

  • Dr. Ahmet Ozyigit

    Dr. Ahmet Ozyigit, MD, MSc, PgDip

    Head of Clinical Research at Elite Hospital

    "As a physician, purity of a product is my main concern when it comes to recommending supplements for my patients. The line of products offered by vitalityPRO is not only in line with the latest research in anti-ageing, but is also third-party tested and purity checked, which is of utmost importance for receiving maximal benefits from treatment."

  • Simon Jones

    Simon Jones, MBChB, MRCP, MSc

    Lead Academy Doctor at a Premier League Football Club

    "Vitality Pro is a fantastic company, clearly striving to achieve the highest standard and reliability of supplements on the market. Their range really is at the cutting edge of longevity supplements, and the independent third-party testing is incredibly reassuring in terms of quality."

  • Casey Vincent

    Casey Vincent, Two-Time Olympian

    Australian Olympics Sprinter 2000-2004

    “I have done my research on vitalityPRO products and without a doubt have found their supplements to be far superior to the competition”

  • Tony Pemberton

    Tony Pemberton, FdENG

    Certified Epigenetic Coach

    "I'm very discerning of either overpriced supplements or poor quality ingredients, but I have to say Vitality PRO products are superb while still being great value. I use them myself for improving ageing biomarkers, and I am happy to recommend them to both my clients and viewership."

  • Kim Forteza

    Kim Forteza, MSc, PGCert, TPU, CNS

    Elite Athlete Coach

    "I have found Vitality Pro to have a great commitment to the client. They generate trust due to their service, presentation, formulation, technical explanations, and third-party analysis of each of their products. It is a brand that I always recommend when looking for excellence in a product, both for my athletes and for all people looking for supplementation with guarantees."

  • Emel Gunay

    Emel Gunay, DipCNM, mBANT, mIFM

    Nutritional Therapist and Research Manager at OMNOS

    "V​itality-PRO offers excellent customer support, knowledgeable staff, and great value for money on high-quality supplements. ​​The products are of outstanding quality, and I appreciate their dedication to quality and transparency, which ensures safety and compliance for my clients. I​ can highly recommend ​them."

  • Dr. Zain Khan

    Dr. Zain Khan, MBBS

    British Medical Association Executive Council Member

    “A professional supplement company who aim to be transparent, innovative and trustworthy. They invest time and money into conducting independent lab tests to verify the purity and quality of their products, ensuring that you receive precisely what you pay for.”

  • Jonny Hirtenstein

    Jonny Hirtenstein, MChiro, DC, ACN

    Founder and Lead Chiropractor at Foundation For Life

    ”As a clinician I appreciate Vitality Pro's passion for producing products that are designed to deliver great results and knowing that they independently test all the batches of the products is very reassuring. Ultimately I know that they care about everything they do, and are striving to produce some of the most cutting edge products on the market.”

  • Andy Smith

    Andy Smith, PEMF Expert

    CEO of NewMed & Founder of CELLER8

    "Vitality Pro offers an impressive range of high-quality supplements, and their Magnesium Glycinate is my personal favourite. I love stacking it with my daily PEMF sessions as they complement each other perfectly for enhanced wellness. I trust Vitality Pro for reliable vitamins and supplements, and I’m always happy to recommend them to my customers!"

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    Customs Fees: There may be customs to pay depending on your country’s local requirements. We will do what we can to avoid or minimise these as much as possible. If import charges are required, you will receive an email or text with customs clearance and payment instructions.

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    We want you to feel confident trying our products. If you're not satisfied for any reason, you can return your product within 60 days of receiving it for a full refund.

    This includes if you've changed your mind, haven't noticed the difference you hoped for, experienced side effects, or simply decided the product isn't right for you.

    How to claim the guarantee

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    • Once your return is received, we'll process your refund within 7 days.

    Return shipping costs: You'll need to arrange and pay for return shipping unless the product arrived faulty or damaged. All returns are sent to our UK return address. If you're ordering from outside the UK, please keep in mind that international return shipping can be expensive.

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    For example, if you order 180 capsules and receive 2 × 90-capsule bottles, you can open and use one 90-capsule bottle. The second bottle must be returned.

    The 60-Day Satisfaction Guarantee does not apply to our 100g NMN or 100g Resveratrol products, as we offer smaller 20g and 30g options to give you the opportunity to try the product before committing to a larger supply.

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