(1 customer review)


A rapid glutathione boost anytime you need it!

Just add to your water bottle for a great tasting pre, post or during workout drink. Also a great afternoon energy boost at the office!

  • Improve performance
  • Increase Energy
  • Reduce Brain Fog

Save and additional $10 with monthly auto-ship from RobKellerMD and get $15 off your first bottle – call for details or go to and enter coupon code RKMD-77566 at checkout.


As an athlete, you need to hydrate with a drink that fuels your body and improves your performance. The ingredients in GRB® formula work in combination with each other to increase Glutathione and activate Nrf2 pathways. GRB® Glutathione Rapid Boost® is a technologically advanced sports drink that can dramatically improve your athletic performance.

Increase Glutathione:

This patented formula increases intra cellular and plasma Glutathione – arguably the most powerful antioxidant. Scientific studies support the many health benefits of maintaining adequate Glutathione levels. However, during exercise, Glutathione is rapidly depleted, which can cause inefficiencies in cell function.

There is a body of scientific evidence that maintaining Glutathione levels will increase the ability of your cells to produce energy, decrease recovery time and assist your cells to perform at an optimal level for a longer time.

When to Drink GRB+

  • When you need an energy boost
  • When you need to stay awake and focused
  • When you need an immunity boost
  • When you are under stress
  • When you have a tough workout
  • When you need to work overtime
  • When you travel or are jet lagged

Activate Nrf2 Pathways:

GRB™ Glutathione Rapid Boost® has ingredients that activate Nrf2. When Nrf2 is activated it tells your cells to produce Catalase, Superoxide Dismutase (SOD) and Glutathione. During exercise the body naturally produces free radicals.

Activating Nrf2 pathways helps your cells neutralize these free radicals. Eliminating free radicals reduces oxidative stress and inflammation allowing your cells to perform more efficiently.

Usage: We use 1/2 packet in 24 oz of water.


Vitamin C is important for overall health & protects cells from oxidants and free radical damage.

Vitamin B Complex (B3, B6, B12) improves energy, brain function and cell metabolism.

Selenium Selenium lowers oxidative stress which reduces inflammation and enhances immunity.

N-Aceytl Cysteine (NAC) increases glutathione, your body’s master antioxidant

L-Citrulline is a natural nitric oxide precursor that supports improved physical and mental performance.

L-theanine is a compound that occurs naturally in green tea and black tea. May improve mental focus and improve sleep quality.

Theobromine is a naturally occurring compound found in dark chocolate known for its energizing effect.

Quercetin is a natural flavonoid from plants that acts as an antioxidant, neutralizing free radicals that cause cellular & DNA damage.

Milk Thistle is a traditional healing herb and functions as an antioxidant and liver detoxification agent.

*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.

Additional information

Weight 0.25 lbs

1 review for GRB

  1. Rugiatu Gegbe (verified owner)

    This is the best natural energy product I have tried so far without the sudden drop of energy, and it has that immunity component.

Add a review

Your email address will not be published. Required fields are marked *