One study found some possible interactions among males who took glutathione as a skin treatment via an IV drip, including liver issues or infertility, which is why the FDA warned the public of the dangers of an injectable skin lightening agent
Achieving an Even Skin Tone Hyperpigmentation and photoaging (damage from the sun) can make the skin look muddy or aged
If improvement plateaus or symptoms persist despite treatment, further investigation may be warranted to identify other contributing factors or alternative diagnoses
Up to now, only one study demonstrated the ability of phenformin to reduce cell viability in TC cells
Am J Phys Heart Circ Phys 298:H2174H2191 Wieczor R, Gadomska G, Ruszkowska-Ciastek B, Stankowska K, Budzynski J, Fabisiak J, Suppan K, Pulkowski G, Rosc D (2015) Impact of type 2 diabetes on the plasma levels of vascular endothelial growth factor and its soluble receptors type 1 and type 2 in patients with peripheral arterial disease