Rob Keller MD® facebook Rob Keller MD® Twitter Rob Keller MD® Youtube Rob Keller MD® Instagram Rob Keller MD® Linkedin

FREQUENTLY ASKED QUESTIONS OGF® FAQs

Answers to common questions about OGF®.



Why doesn't OGF® contain glutathione?

OGF® contains N-Acetyl-L-Cysteine (NAC), an amino acid precursor involved in the body's natural glutathione production process. OGF® also includes complementary nutrients selected to support the body's natural glutathione pathways and overall antioxidant activity.*



How is OGF® different from many glutathione supplements?

OGF® supports healthy glutathione function 5 Ways*

1 - Supports amino acid availablity for glutathione production*

2 - Supports nutrient absorption*

3 - Supports glutathione recycling*

4 - Supports enzyme activity*

5 - Supports antioxidant pathways*



Do I have to take OGF® every day?

OGF® is designed for daily use as part of a healthy wellness routine. Consistent use helps support healthy glutathione production and antioxidant activity over time.*



Should I take OGF® with food?

OGF® may be taken with or without food. Individuals with sensitive stomachs may prefer taking it with a meal.



Why does my OGF® have a sulfur-like smell?

Some ingredients in OGF®, including Alpha Lipoic Acid (ALA), naturally have a sulfur-like aroma. Exposure to heat during shipping may temporarily intensify this odor. The smell does not affect product quality or potency.



Is OGF® related to Max GXL?

OGF® was developed by Dr. Robert H. Keller. The underlying glutathione technology was previously licensed to Max International for a period of time. OGF® continues to be manufactured in a GMP-compliant facility using the formulation developed by Dr. Keller.



Does OGF® support immune health?

Healthy glutathione levels play an important role in normal immune function. OGF® Essential Support is designed to support healthy glutathione function as part of a daily wellness routine.*



Who should not take these products?

If you are pregnant and/or nursing, you should discontinue use of products until you have reviewed and consulted with your personal physician regarding your wellness needs. If you have a severe allergy or sensitivity to ingesting shellfish or mushrooms, you should discontinue use of this product. We always recommend consulting with a doctor before starting any nutritional supplements.



Does OGF® support energy and vitality?

Healthy glutathione levels play an important role in cellular wellness. Many people choose OGF® as part of a wellness routine focused on maintaining energy and vitality.*



Why is glutathione important?

Glutathione is found throughout the body and plays an important role in cellular antioxidant activity. Maintaining healthy glutathione levels is an important part of overall wellness.*



Why is glutathione important throughout the body?

Glutathione is naturally present in virtually every cell of the body and plays an important role in cellular antioxidant activity. OGF® Essential Support is designed to support healthy glutathione function as part of a daily wellness routine.*



Why is glutathione important?

Glutathione is naturally produced by the body and plays an important role in cellular antioxidant activity. Factors such as age, lifestyle, and environmental stress may influence the body's natural glutathione levels, which is why many people choose nutritional support as part of their wellness routine.*



How long should I take OGF®?

Individual experiences may vary. OGF® Essential Support is designed to be used consistently as part of a long-term wellness routine. Many customers choose to incorporate OGF® into their daily supplement regimen.*



Why do some people notice changes when starting OGF®?

Most people begin taking OGF® without difficulty. However, a small number of customers report noticing temporary changes when first introducing OGF® into their wellness routine. Because every individual is different, responses can vary. Over the years, we have found that these experiences are generally temporary and often lessen as the body adapts to a new nutritional regimen. Maintaining adequate hydration and taking OGF® as directed may help support a comfortable experience.



What are the ingredients of OGF®?

Each of the ingredients in OGF® were individually selected by Dr. Keller to create the ideal glutathione optimizer. They are glutamine, N-acetyl cysteine, N-acetyl D-glucosamine, vitamin C, quercetin, alpha lipoic acid, cordyceps, and milk thistle (silymarin).



Is OGF® manufactured in a GMP certified lab?

All RKMD supplements are manufactured in a GMP certified facility in compliance with international GMP standards.


If you have questions about your experience with OGF®,
we encourage you to contact our customer support team.






This product has been manufactured and prepared in the USA by a GMP certified facility in strict conformance with industry and governmental standards. Purity and potency guaranteed.

*The statements on this page have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.






Rob Keller MD® Logo
Rob Keller MD® facebook Rob Keller MD® Twitter Rob Keller MD® Youtube Rob Keller MD® Instagram Rob Keller MD® Linkedin
                       

615 S. Gladiola St.
Salt Lake City, Utah 84104


Copyright RobKellerMD © 2026

Proudly Accepting

accepted payment methods






Contact Us

Call Us email Us

Proudly Accepting

 some accepted payment methods