Allergy Research Group NAC N Acetyl L Cysteine Glutathione Injection Before and After: What Expect In Results Skin Whitening Injections: Do They Work and Are They Safe? Skin safety should always come first. The Philippine Dermatological Society reminds the public that intravenous glutathione must not be used for skin whitening. It has weak evidence of effectiveness and carries Is glutathione safe to use in adults with or without pre existing medical conditions, such as asthma or allergies, and potential interactions with medications like blood thinners or diabetes medications?