Colloidal platinum mein microscopic platinum particles hote hain jo liquid mein suspend rehte hain. Cosmetics mein iska use antioxidant aur anti-aging benefits ke liye hota hai, lekin iska solid scientific evidence abhi tak limited hai. Yeh ingredient mainly luxury skincare products mein use hota hai, aur generally safe samjha jata hai sensitive skin ke liye bhi, par actual effectiveness ke baare mein zada research ki zaroort hai.