Glisodin
Also known as: GliSODin, gliadin-protected SOD, GP-SOD, Superoxide Dismutase (SOD)
Overview
GliSODin is a proprietary oral antioxidant supplement that combines superoxide dismutase (SOD) extracted from a specific variety of melon (*Cucumis melo* LC) with gliadin, a wheat protein. SOD is a crucial endogenous antioxidant enzyme responsible for catalyzing the dismutation of superoxide radicals, thereby reducing oxidative stress. The gliadin coating is designed to protect the SOD enzyme from degradation by stomach acid, ensuring its stability and absorption in the small intestine, which allows for systemic antioxidant effects. GliSODin is primarily used to mitigate oxidative stress and inflammation, support muscle recovery in athletes, and serve as an adjunct therapy in certain skin conditions like vitiligo. Due to the presence of gliadin, it contains gluten. While several randomized controlled trials (RCTs) support its efficacy in specific applications, the overall research maturity is emerging, with some mixed results and a call for more high-quality studies.
Benefits
GliSODin offers several evidence-based benefits, primarily stemming from its antioxidant properties: 1. **Reduction of Oxidative Stress and Inflammation:** A 6-week randomized controlled trial involving 28 elite rowers demonstrated that daily supplementation with 500 mg of GliSODin significantly decreased markers of muscle damage and inflammation following intense exercise compared to a placebo. This suggests its utility for athletes experiencing high levels of oxidative stress. 2. **Improvement in Skin Repigmentation in Vitiligo:** A 24-week randomized controlled trial with 50 vitiligo patients showed that combining GliSODin (1 g/day for 12 weeks, then 0.5 g/day) with narrowband UVB phototherapy led to significantly greater repigmentation (19.85% improvement in Vitiligo Extent Score) compared to phototherapy alone (8.83% improvement). This indicates a strong synergistic effect, with excellent tolerance observed. The effect size was statistically significant (p<0.0001), highlighting its clinical relevance in this specific context. Secondary effects, such as potential enhancement of endogenous antioxidant defenses and vascular health, have been suggested but require further quantification. Benefits are particularly noted in athletes exposed to intense exercise-induced oxidative stress and in vitiligo patients undergoing phototherapy. The time course for benefits ranges from 6 weeks for exercise-related outcomes to 12-24 weeks for skin repigmentation.
How it works
GliSODin's mechanism of action centers on the enzymatic activity of Superoxide Dismutase (SOD). SOD catalyzes the conversion of harmful superoxide radicals (O2•−) into less reactive hydrogen peroxide and oxygen, thereby directly reducing oxidative stress within the body. The crucial aspect of GliSODin's formulation is the gliadin coating, which acts as a protective barrier. This coating prevents the SOD enzyme from being degraded by the acidic environment of the stomach, ensuring that the active enzyme reaches the small intestine. Once in the small intestine, the SOD can be absorbed and exert its systemic antioxidant effects. By modulating oxidative stress and inflammatory pathways, GliSODin can contribute to reducing muscle injury and promoting cellular recovery, particularly in skin cells.
Side effects
GliSODin is generally considered well-tolerated and has demonstrated an excellent safety profile in clinical trials. Common side effects (occurring in >5% of users) have not been reported, and any mild, transient adverse events observed in studies were not attributed to the supplement itself. Similarly, uncommon (1-5%) and rare (<1%) side effects have not been documented. However, a significant contraindication exists: GliSODin contains gliadin, a component of gluten. Therefore, it is strictly contraindicated for individuals with celiac disease or known gluten intolerance. For these specific populations, consumption could lead to adverse gastrointestinal and systemic reactions associated with gluten exposure. No significant drug interactions have been documented in the available research. Special consideration must always be given to the gluten content when recommending or using GliSODin, ensuring that individuals with gluten sensitivities are appropriately advised.
Dosage
The recommended dosage for GliSODin varies depending on the intended use, with clinical trials providing specific guidelines. For reducing exercise-induced oxidative stress and inflammation, a minimum effective dose of **500 mg per day** has been observed in studies involving athletes. For vitiligo treatment in conjunction with phototherapy, a higher initial dose of **1 gram per day** was used for the first 12 weeks, followed by a maintenance dose of **0.5 grams per day**. The maximum safe dose has not been definitively established, but doses up to 1 gram per day have been well-tolerated in clinical trials. Regarding timing, it is generally recommended to take GliSODin on an empty stomach, ideally 1 hour before training or breakfast. This timing is believed to optimize absorption and enhance its antioxidant effect. GliSODin is typically available in capsule form, containing the gliadin-protected SOD. The gliadin coating is crucial for the bioavailability of the SOD, as it protects the enzyme from gastric degradation. No specific cofactors are identified as necessary for its efficacy.
FAQs
Is GliSODin safe for gluten-sensitive individuals?
No, GliSODin contains gliadin, a component of wheat protein (gluten). Therefore, it is not suitable for individuals with celiac disease or gluten intolerance and should be avoided by them.
How soon can benefits be expected from GliSODin?
Effects on oxidative stress and inflammation, particularly in athletes, may be observed within 6 weeks. For skin repigmentation in vitiligo, more prolonged use, typically 12 to 24 weeks, is required to see significant improvements.
Can GliSODin replace the body's natural antioxidants?
No, GliSODin supplements the body's endogenous antioxidant defenses by providing active superoxide dismutase. It is intended to enhance these natural systems, not to replace them entirely.
Is GliSODin effective on its own, or only with other therapies?
While it has shown benefits alone for exercise-induced oxidative stress, its efficacy in vitiligo was demonstrated as an adjunct to narrowband UVB phototherapy. Its standalone effects for vitiligo are less studied.
Are there any known drug interactions with GliSODin?
Based on current clinical trial data, no significant drug interactions have been reported for GliSODin. However, individuals should always consult with a healthcare professional regarding supplement use with medications.
Research Sources
- https://pmc.ncbi.nlm.nih.gov/articles/PMC9598269/ – This randomized controlled trial (RCT) investigated the effects of GliSODin (500 mg/day) in 28 elite rowers over 6 weeks. It found that GliSODin supplementation significantly reduced markers of muscle damage and inflammation, while also improving antioxidant defense compared to placebo. The study supports GliSODin's role in mitigating exercise-induced oxidative stress, though it had a small sample size and was manufacturer-funded.
- https://pmc.ncbi.nlm.nih.gov/articles/PMC8360035/ – This RCT, involving 50 vitiligo patients over 24 weeks, demonstrated that GliSODin (1 g/day then 0.5 g/day) combined with narrowband UVB phototherapy led to significantly greater repigmentation (19.85% improvement) compared to phototherapy alone (8.83%). The study highlights GliSODin's potential as an effective adjunct therapy for vitiligo, showing excellent tolerance and statistically significant outcomes.
- https://onlinelibrary.wiley.com/doi/10.1111/jdv.17331 – This source appears to be a publication of the same RCT as the previous one (Fontas et al. 2021) focusing on GliSODin's effect on vitiligo. It reinforces the finding that GliSODin, when used as an adjunct to NB-UVB phototherapy, significantly improves repigmentation rates and is well-tolerated, providing strong evidence for its use in this specific dermatological condition.
- https://www.jle.com/en/revues/phy/e-docs/positive_effects_of_an_oral_supplementation_by_glisodin_a_gliadin_combined_sod_rich_melon_extract_in_an_animal_model_of_dietary_induced_oxidative_stress_342990/article.phtml?tab=references – This animal model study investigated the effects of oral GliSODin supplementation on dietary-induced oxidative stress. It found that GliSODin reduced markers of oxidative stress in the animal model, providing preclinical evidence that supports its antioxidant properties. While not a human clinical trial, it offers supportive data for the biological activity of GliSODin.
Supplements Containing Glisodin

GliSODin
NOW

Opti-Relief
Bronson Laboratories

Heart Science
Source Naturals

Advanced Anti-Aging Formula
GliSODin Skin Nutrients

Advanced Skin Brightening Formula
GliSODin Skin Nutrients

Bio Regen
Purium
Revive It All
Purium

Liveright
Guardian Health

SOD POWER™ AS GLISODIN® SUPEROXIDE DISMUTASE (SOD)
SOURCE NATURALS®