Community-reported (anecdotal): headache, brain fog or mental fatigue, irritability, anxiety, nausea or other GI upset, appetite and sleep changes, blood-pressure changes, and skin reactions with transdermal-DMSO use
Glutathione IV therapy sessions can be expensive, with prices varying widely depending on location and provider

Miduty Liposomal Glutathione 85% 30 Caps 2,054 68 / count Vlados Himalayan Organics Glutathione Builder | Anti-Ageing & Skin Brightening with (Vitamin C, E, B6 & Curcumin) 60 Tabs 759 MRP: 923 13 / count Miduty Pigment Clear+ 60 Caps 2,428 40 / count Bolt Nutrition L-Glutathione Effervescent 15 Tabs, Orange 474 MRP: 649 32 / count Simply Herbal L Glutathione 60 Caps 599 MRP: 1,599 10 / count Miduty Liposomal Glutathione 30 Caps 1,493 50 / count Vlado's Himalayan Organics Liposomal Glutathione+ 650 mg+ 30 Caps 1,071 MRP: 1,995 36 / count BPI Sports L-Glutathione Reduced+ 30 Caps 849 MRP: 1,299 28 / count HealthyHey Nutrition Reduced Glutathione with Milk Thistle 450mg 60 Caps 1,049 MRP: 1,509 17 / count 4.3 (3) Chicnutrix Glow - Glutathione and Vitamin C - Skin Radiance & Glow 20 Tabs, Strawberry & Lemon 970 MRP: 1,399 49 / count Inja Wellness Glow Liposomal Glutathione (15 Effervescent tablets) 1 Tube, Lemon 600 MRP: 750 600 / count Neuherbs Glutathione 600mg | For Healthy & Glowing Skin 15 Tabs, Orange 599 MRP: 849 40 / count

[unverified no linkable source] Reconstituted-solution beyond-use / bacteriostatic-water degradation conventions (~28 days)
It mainly affects your skin if you have psoriasis, and your joints and other areas if you have rheumatoid arthritis
During fertility treatments, GHKCu could be used to stabilize local hormonal environments, for example, reducing inflammatory factors that blunt follicle response or protecting testicular cells during assisted procedures