Product Spotlight: CitriSafe Sublingual Glutathione Supplement

Sublingual Glutathione: How Troche Delivery Supports Glutathione Absorption

CitriSafe Sublingual Acetyl-Glutathione is a troche formulation developed by Walter Hayhurst, R.Ph., founder of Professional Compound Centers of America (PCCA), who has trained over 4,000 compounding pharmacists in custom pharmaceutical formulation and delivery. Traditional oral glutathione products face well-documented bioavailability challenges due to digestive breakdown and first-pass liver metabolism. Sublingual delivery offers an alternative approach designed to support absorption through the oral mucosa rather than the GI tract.

The Challenge with Glutathione Delivery

The delivery method and formulation are critical components of all supplement and medicinal products. Our bodies have an efficient method for getting nutrition and medicine into the blood stream and to the right places. This process is called Pharmacokinetics. ADME is an acronym used by pharmaceutical companies to explain pharmacokinetics. ADME stands for Absorption, Distribution, Metabolism, and Excretion. It’s a framework for understanding how every food, supplement, medicine, or toxin moves through the body. Understanding of ADME is important for supplements. Read more about medical treatment of toxins (ImmunoLytics is a sister company of CitriSafe) .

Glutathione ADME:

• Absorption: This is the process by which a supplement enters the body and reaches the bloodstream. The route of administration (oral, intravenous, sublingual, etc.) and the rate of dissolution are important factors. The bioavailability of a drug, which is the proportion of the drug that enters circulation and can have an active effect, is a key concept in absorption. Very little orally digested glutathione reaches the bloodstream due to stomach acids, and other processes that diminish the dose load.
• Distribution: After absorption, glutathione is distributed throughout the body to various tissues and organs.
• Metabolism: Metabolism refers to the chemical modifications the supplement undergoes in the body. The liver is the primary site for drug metabolism.  Metabolism can either activate a drug, inactivate it, or alter its pharmacological activity.
• Excretion: This is the process by which the supplement and its metabolites are eliminated from the body, primarily through the kidneys into the urine, but also through bile into feces. The rate of excretion can influence the duration and intensity of a medicine or supplement.

Understanding ADME is critical for determining the dosage, route of administration, frequency, and duration of treatment with any supplement or medication.

First Generation Oral Glutathione: L-Glutathione

There are several hundreds of product options when looking for oral glutathione.  When it comes to oral glutathione supplementation, there are several challenges related to its absorption:

• Glutathione can be broken down by digestive enzymes in the stomach and intestines, which may limit its absorption.
• Glutathione is a relatively large molecule, which can make it difficult for it to pass through the intestinal lining and into the bloodstream intact.
• When ingested orally, glutathione may undergo first-pass metabolism in the liver, further reducing its bioavailability.
• The absorption of glutathione may also be influenced by the presence of other amino acids in the digestive tract, as they can compete for absorption.

Due to these challenges, research suggests that first-generation oral glutathione supplements have limited ability to raise blood glutathione levels (Witschi et al., Eur J Clin Pharmacol, 1992).

Second Generation Oral Glutathione Products

• Liposomal Glutathione: Liposomes are tiny spherical vesicles of lipids (cholesterol or fats) that can encapsulate glutathione, protecting it from degradation in the digestive tract and potentially improving absorption. Liposomal glutathione improves on first generation glutathione.  These formulations are primarily liquids that have a distinct unpalatable odor, taste, and must be refrigerated and utilized within 30-90 days.
• Precursor Amino Acids: Some supplements contain precursor amino acids like cysteine, which are believed to help the body synthesize its own glutathione.
• N-Acetyl Cysteine (NAC): NAC is a compound that can increase cysteine levels in the body, which is a key component of glutathione. NAC had medicinal effects and is primarily utilized where these effects contribute to the patient’s condition.
• Acetyl-Glutathione. The addition of the acetyl group to glutathione is believed to protect it from degradation in the digestive tract. As a result, N-acetyl glutathione may have better oral bioavailability compared to regular glutathione supplements.
• Advanced Formulation Acetyl-Glutathione: CitriSafe Acetyl-Glutathione uses proprietary nanotechnology to encapsulate the acetylated molecule, protecting it through the digestive process. Because more of the active compound survives digestion, the oral capsule is dosed at 300 mg, well below the 500–2,000 mg typical of first-generation glutathione products.

CitriSafe Sublingual Acetyl-Glutathione

CitriSafe Sublingual Glutathione Troche formulation slowly dissolves under the tongue. Sublingual delivery, the method used by this formulation, offers several pharmacological advantages:

• Rapid Absorption: Sublingual delivery allows substances to bypass the digestive system and liver, which can lead to quicker absorption into the bloodstream. This can result in faster onset of effects compared to oral ingestion.
• Avoiding First-Pass Metabolism: When substances are ingested orally, they pass through the liver before entering the systemic circulation. The liver can metabolize or break down some substances, reducing their bioavailability. Sublingual administration avoids this “first-pass metabolism.”
• Higher Bioavailability: Because sublingual delivery avoids the gastrointestinal tract and liver, it can lead to higher bioavailability of certain compounds. This means that a greater percentage of the substance reaches the bloodstream intact and can be utilized by the body.
• Convenient and Non-Invasive: Sublingual administration is a non-invasive method that is more convenient and more comfortable than other routes, such as injections.

These findings are supported by peer-reviewed research, including a crossover trial demonstrating significantly higher plasma glutathione levels with sublingual delivery (p=0.003). See the full evidence base on our Science page.

Glutathione Delivery Methods Compared

Dosing figures reflect product specifications, not clinical recommendations. Individual needs vary.

Conclusion

As a result, CitriSafe Sublingual Glutathione tablets are dosed at 100 mg. The troche formulation has been refined to control the dissolution rate of the supplement, improve stability, and improve taste. Sublingual delivery is designed to support glutathione absorption while avoiding the digestive breakdown associated with oral supplementation, which may reduce the need for the higher doses typically required by first-generation products.