Dimethyl Sulfoxide

Dimethyl sulfoxide (DMSO) is an organic compound with the chemical formula (CH3)2SO. It is a clear, colorless liquid with a characteristic garlic-like or oyster-like odor. DMSO is a highly polar solvent known for its ability to penetrate biological membranes and dissolve both polar and nonpolar substances. In industrial and research contexts, it has been used as a solvent in pharmaceuticals, cosmetics, and laboratory applications. The compound is produced through the oxidation of dimethyl sulfide, a byproduct of the kraft paper pulping process.

In food science research, DMSO has been investigated as a potential flavoring agent or flavor adjuvant—a substance that can enhance, modify, or otherwise influence the perception of flavors in food products. Its solvent properties make it theoretically useful for dissolving and distributing flavor compounds. However, it is not currently permitted for use as a food additive in the United States, the European Union, or most other major regulatory jurisdictions. Any presence of DMSO in food products would be incidental or investigational rather than intentional use.

Dimethyl sulfoxide has a long history of research in medical and scientific contexts. When applied topically or used in laboratory settings, DMSO has demonstrated relatively low acute toxicity in animal studies. The FDA has not classified DMSO as Generally Recognized As Safe (GRAS) for food use, which reflects the absence of sufficient evidence meeting the specific criteria for food additive approval. According to FDA records, there have been zero reported adverse events associated with DMSO as a food additive, and zero recalls have been issued related to its use in food.

The lack of adverse event reports and recalls reflects the fact that DMSO is not approved or intentionally used in food products in the United States. Toxicological studies in animals have shown that DMSO is absorbed through the gastrointestinal tract when ingested. Its metabolic fate and potential long-term effects from dietary exposure have not been extensively characterized in the peer-reviewed literature specific to food safety.

Dimethyl sulfoxide is not approved as a food additive by the FDA and does not appear on the list of GRAS substances for food use. It is approved for certain medical applications, including topical use for interstitial cystitis (FDA-approved for this specific indication), but this approval does not extend to food applications. The European Food Safety Authority (EFSA) has not evaluated DMSO for use as a food additive or flavoring agent. Most countries do not permit its intentional use in food products intended for human consumption.

While DMSO has been extensively studied in pharmaceutical and medical research contexts, the peer-reviewed literature specific to its use as a food flavoring agent or adjuvant is limited. Studies examining DMSO in food science applications are primarily investigational in nature and do not represent regulatory approval or widespread acceptance. Research on DMSO's metabolism, toxicology, and safety has predominantly focused on medical and topical applications rather than chronic dietary exposure. Any evaluation of DMSO for potential food use would require comprehensive toxicological studies, including long-term feeding studies in animals and assessment of its fate in the human body when present in food.