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doi: 10.1023/b:pham.0000008047.82334.7d

This increased training load, combined with reduced caloric intake, creates prime conditions for overuse injuries

New Engl J Med (1969) 280:7359

[11] It is important to note that the majority of mechanistic evidence derives from laboratory and animal studies rather than large-scale human clinical trials

It also includes training of production staff to avoid issues like cross-contamination of products
