🚨 If your orthomolecular, integrative, or functional medicine practitioner is truly thorough and technically sound—as they should be—there’s a good chance they’ve already ordered—or at least seriously considered—a G6PD test before starting certain treatment protocols.
If that was never even mentioned, it's worth asking some questions.
G6PD (glucose-6-phosphate dehydrogenase) deficiency is one of the most common inherited enzyme disorders in the world, and many people don’t even know they have it. This enzyme is essential for the production of NADPH and for maintaining the proper functioning of glutathione—one of the main systems that protects red blood cells against oxidative stress, which can lead to their rupture and hemolysis, a potential medical emergency.
Why is this so important?
Because several interventions used in the aforementioned areas intentionally increase oxidative stress as part of the therapeutic mechanism.
Most common examples:
- High-dose intravenous vitamin C;
- Systemic ozone therapy;
- Methylene blue;
- Artemisinin or artesunate;
- Protocols for combination infusions of intravenous vitamin C, minerals, amino acids, and various related compounds;
- Protocols involving intravenous hydrogen peroxide (H₂O₂), used by some healthcare professionals;
- Intravenous colloidal silver;
- Chelation therapies combined with oxidative infusions or other pro-oxidant strategies.
I’m not arguing here whether these tools are “good” or “bad.” The point is something else: sound medical practice begins with an assessment of the patient’s biochemistry—not simply by adding substances.
Furthermore, ⚠️ health isn’t just a matter of medical tests, IVs, “serums,” and injections. None of these things can replace adequate water intake, quality sleep, physical activity, a healthy diet, reducing exposure to toxins, stress management, and adopting healthy habits—pillars that I explain on the website DomineSuaSaude.com.br.
Summary:
Do you want to receive truly expert guidance in the fields of orthomolecular, functional, or integrative medicine?
Also request a G6PD test and ensure that the results are interpreted correctly.
Otherwise, you might end up in the emergency room because of something that was supposed to help, such as vitamin C, ozone, methylene blue, and others.
AN IN-DEPTH EDUCATIONAL AND TECHNICAL OVERVIEW OF G6PD
In orthomolecular, functional, and integrative approaches, G6PD testing goes beyond basic screening and serves as a safety check for oxidative and hormetic therapies.
In these practices, many treatments are based on inducing an acute, controlled spike in oxidative stress—known as pro-oxidation—with the aim of stimulating mitochondrial biogenesis, the apoptosis of abnormal cells, or the elimination of pathogens.
Without G6PD to regenerate NADPH and maintain glutathione in its reduced state, red blood cells lose some of their defensive capacity and become more vulnerable to hemolysis.
Based on consensus in orthomolecular practice and on references frequently cited by sources grounded in research and clinical practice, these are some of the scenarios in which G6PD testing should be considered a safety prerequisite:
1. HIGH-DOSE INTRAVENOUS VITAMIN C
This is the most common scenario in integrative oncology—as seen in the Riordan Clinic protocol—and in immune support for patients with serious conditions.
- Mechanism: At physiological doses, ascorbic acid acts as an antioxidant. However, at high intravenous doses—generally above 15 g to 25 g—it can act as a pro-oxidant, reacting with extracellular iron and copper and generating hydrogen peroxide (H₂O₂).
- Risk: Healthy cells neutralize H₂O₂ using enzymes such as catalase and glutathione peroxidase. Red blood cells rely on the pentose phosphate pathway—which is linked to G6PD activity—to maintain reduced glutathione. In people with a deficiency of this enzyme, high doses of vitamin C may increase the risk of intravascular hemolysis.
2. SYSTEMIC OZONE THERAPY
It is used in Brazilian integrative medicine for purposes such as immune modulation and the management of chronic pain and infections.
- Mechanism: Ozone (O₃) is a potent oxidizing agent. In major autohemotherapy or rectal insufflation, it interacts with membrane lipids, creating reactive oxygen species and lipid peroxides—also known as ozonides—which play a role in therapeutic signaling.
- Risk: G6PD deficiency is described in ozone therapy guidelines, such as the Madrid Declaration, as a contraindication for certain procedures. The difficulty in neutralizing the initial oxidative stress may increase the risk of red blood cell damage.
3. USE OF METHYLENE BLUE
This compound has gained prominence in integrative medicine for purposes such as mitochondrial optimization, neuroprotection, and its use in certain treatment protocols for chronic infections or post-viral conditions.
- Mechanism: At low doses, it may act as an electron carrier in the mitochondrial respiratory chain, promoting ATP production. At higher doses, it may have a pro-oxidant effect.
- Risk: Methylene blue may cause direct oxidative stress. In people without G6PD deficiency, it is also used to treat methemoglobinemia. However, in patients with this enzyme deficiency, it may be ineffective at reducing methemoglobin, cause hemolysis, and, paradoxically, worsen oxygenation.
4. INTRAVENOUS HYDROGEN PEROXIDE
It is an old and aggressive therapy advocated by some practitioners of complementary medicine for conditions such as chronic infections and severe fatigue.
- Risk: Introducing H₂O₂ into the bloodstream requires that the red blood cells’ antioxidant systems be fully functional. G6PD deficiency can significantly increase the risks associated with this practice.
5. ARTEMISININ AND ITS DERIVATIVES
Artemisinin and its derivatives, such as artesunate, are conventionally used to treat malaria and are also included in some integrative treatment protocols related to oncology and certain infections.
- Mechanism: Artemisinin contains an endoperoxide bridge. When it comes into contact with iron, this bridge can break and release free radicals.
- Risk: Due to the mechanism involved in the generation of reactive oxygen species, the antioxidant capacity of red blood cells must be taken into account. G6PD deficiency may increase the risk of damage to red blood cells.
6. HIGH DOSES OF INTRAVENOUS COLLOIDAL SILVER
Some integrative protocols for systemic infections use intravenous colloidal silver. Metals can contribute to the development of oxidative stress. For this reason, certain sources in the integrative literature recommend testing for G6PD deficiency before initiating protocols that could cause oxidative overload in red blood cells.
7. CHELATION THERAPY
Although agents such as EDTA are not primarily pro-oxidants, some chelation programs alternate or combine them with high-dose vitamin infusions, such as protocols that include vitamin C.
The risk may not lie in the chelating agent alone, but in the combination of infusions and strategies used simultaneously.
In short, the shift from the paradigm that “everything needs antioxidants” to an understanding of the hormetic effect—in which programmed, temporary oxidative stress can contribute to the signaling of adaptive and repair mechanisms—is one of the proposed foundations for these therapies.
The G6PD test helps determine whether the body has adequate metabolic capacity—related to NADPH production—to cope with certain oxidative stresses without causing damage to the blood cells themselves.
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