The solution is no longer protected against microbial growth
You can know more about Glutathione IV treatments, including the skin concerns it helps to address and who should opt for it, herein
14 In addition to studies on general aging, animal trials in mice have also evaluated the potential of GHK-Cu treatment in mice with Alzheimers disease

United States: Schedule III controlled substances Illegal to possess without prescription Illegal to distribute Prescriptions only for specific medical conditions Not prescribed for muscle building/athletic performance Penalties for possession (US): First offense: Up to 1 year prison, minimum $1,000 fine Second offense: Up to 2 years prison, minimum $2,500 fine Distribution: Much harsher (up to 5 years, $250,000 fine) Other countries: UK: Class C drugs (illegal to supply, legal to possess for personal use) Canada: Schedule IV (illegal without prescription) Australia: Schedule 4 (prescription only) Mexico: Legal over-the-counter (but smuggling back to US illegal) How people acquire them: Underground labs (UGLs) - quality varies wildly Black market from gyms/dealers - risky, often fake Online sources - legal risk, customs seizure risk Medical tourism - travel to countries with lax laws Prescription for legitimate medical need (TRT for low T) Quality concerns: No regulation of underground products Underdosed or fake products common Contamination risks Heavy metal contamination reports Completely wrong compounds sometimes Peptide legality Legal status: Gray area in most countries

In addition to the shade change, your pee may take on a cloudy appearance
Others are modified versions, as with the blockbuster GLP-1 obesity drugs