FDA Issues Warning Letter to Spa De Soleil, Inc.

Spa De Soleil, Inc. of Sun Valley, CA received a warning letter from the United States Food and Drug Administration (FDA) for violations of Current Good Manufacturing Practice (CGMP) regulations for finished pharmaceuticals.

According to the FDA:

The United States Food and Drug Administration (FDA) inspected your drug manufacturing facility, Spa De Soleil, Inc., FEI 3003876848, at 10443 Arminta Street, Sun Valley, from January 20 to 26, 2026.

This warning letter summarizes significant violations of Current Good Manufacturing Practice (CGMP) regulations for finished pharmaceuticals. See Title 21 Code of Federal Regulations (CFR), parts 210 and 211 (21 CFR parts 210 and 211).

Because your methods, facilities, or controls for manufacturing, processing, packing, or holding do not conform to CGMP, your drug products are adulterated within the meaning of section 501(a)(2)(B) of the Federal Food, Drug, and Cosmetic Act (FD&C Act), 21 U.S.C. 351(a)(2)(B).

We reviewed your February 6, 2026 response to our Form FDA 483 in detail. Your response is inadequate because you failed to provide supporting documentation for evaluation or adequate evidence of corrective actions taken to bring your operations into compliance with CGMP.

During our inspection, our investigator observed specific violations including, but not limited to, the following.

1. Your firm failed to thoroughly investigate any unexplained discrepancy or failure of a batch or any of its components to meet any of its specifications, whether or not the batch has already been distributed (21 CFR 211.192).

2. Your firm failed to conduct at least one test to verify the identity of each component of a drug product. Your firm also failed to validate and establish the reliability of your component supplier’s test analyses at appropriate intervals (21 CFR 211.84(d)(1) and 211.84(d)(2)).

3. Your firm failed to establish adequate written procedures for production and process control designed to assure that the drug products you manufacture have the identity, strength, quality, and purity they purport or are represented to possess, and your firm’s quality control unit did not review and approve those procedures, including any changes (21 CFR 211.100(a)).

4. Your firm failed to establish laboratory controls that include scientifically sound and appropriate specifications, standards, sampling plans, and test procedures designed to assure that components, drug product containers, closures, in-process materials, labeling, and drug products conform to appropriate standards of identity, strength, quality, and purity (21 CFR 211.160(b)).

5. Your firm failed to establish an adequate quality control unit with the responsibility and authority to approve or reject all components, drug product containers, closures, in-process materials, packaging materials, labeling, and drug products and the authority to review production records to assure that no errors have occurred or, if errors have occurred, that they have been fully investigated (21 CFR 211.22(a)).

Products Containing Ingredients at Risk

According to FDA: You also failed to adequately test your incoming components at high risk of diethylene glycol (DEG) or ethylene glycol (EG) contamination for identity before using them to manufacture your drug products. This includes, but is not limited to, testing glycerin to determine its appropriate identity prior to use in manufacturing your OTC topical drug products.

Identity testing for glycerin and certain other high-risk drug components includes a limit test in the USP to ensure the component meets the relevant safety limits for DEG or EG levels. Because you did not perform identity testing on each shipment of each lot using the USP identification test that detects these hazardous impurities, you failed to assure the acceptability of these components for use in the manufacture of your drug products.

The use of ingredients contaminated with DEG or EG has resulted in various lethal poisoning incidents in humans worldwide. See FDA’s guidance document Testing of Glycerin, Propylene Glycol, Maltitol Solution, Hydrogenated Starch Hydrolysate, Sorbitol Solution, and Other High-Risk Drug Components for Diethylene Glycol and Ethylene Glycol.

Repeat Violations at Facility

In a previous inspection, dated Sept.13-17, 2021, FDA cited similar CGMP violations. You proposed specific remediations for these violations in your response. Repeated failures demonstrate that executive management oversight and control over the manufacture of drugs is inadequate.

Cosmetics Manufactured for Distribution in the United States

In addition, some of the products you manufacture may be regulated as cosmetics, as defined in section 201(i) of the FD&C Act [21 U.S.C. 321(i)]. Any cosmetics you manufacture must comply with applicable statutory and regulatory requirements, including the FD&C Act. We note that under section 301(a) of the FD&C Act [21 U.S.C. 331(a)], it is a prohibited act to introduce or deliver for introduction into interstate commerce a cosmetic that is adulterated or misbranded.

We also note that the Modernization of Cosmetics Regulation Act of 2022 (MoCRA) provides new requirements with which facilities that manufacture cosmetic products must comply.

Conclusion

The violations cited in this letter are not intended to be an all-inclusive list of violations that exist at your facility.

To see the full letter, go here.