J Gerontol A Biol Sci Med Sci, 2008, 63 (10), 10271033
Two better-absorbed options are N-acetylcysteine (NAC), which provides the rate-limiting amino acid cysteine so the body can build its own supply, and liposomal glutathione, which uses fat-based capsules to protect the molecule through digestion
And then [also] other medications

Regulatory status: Not approved for human therapeutic use by the FDA Available for research purposes only Not intended for human consumption outside research Researchers are responsible for appropriate use Research ethics: Informed consent is essential for human research Full disclosure of known risks and benefits Appropriate institutional review board (IRB) approval Adherence to good clinical practice (GCP) standards Proper documentation and medically supervised safety monitoring Athletic use factors: Both peptides are prohibited by WADA Banned in most competitive sports Athletes subject to testing should not use them Researchers working with athletes must ensure compliance Risk Mitigation Strategies To maximize safety during research with the blend: Protocol design: Start with standard doses Use the shortest duration necessary for research objectives Include appropriate safety monitoring Set clear stopping criteria for safety concerns Plan for adverse event management Subject selection: Careful screening to exclude high-risk individuals Thorough medical history and examination Assessment of contraindications Exclusion of those with absolute contraindications Enhanced monitoring for relative contraindications Monitoring and follow-up: Regular safety assessments during research Prompt attention to adverse effects Documentation of all safety findings Follow-up after completion Long-term monitoring if indicated Quality assurance: Use pharmaceutical-grade peptides from reputable sources Verify peptide identity and purity Proper storage and handling Accurate dosing and administration Sterile technique for all injections Emergency Preparedness Research protocols should include plans for managing possible emergencies

That means for every 10 pounds lost, roughly 3-4 pounds came from muscle and other lean tissue
Regular physical activity, especially strength training, is also critical to helping slow the loss of muscle during weight-loss therapy