O., Milligan, W., Lochhead, P
Acesulfame-K (Ace-K) Aspartame Banned substances Benzoic acid Butylated hydroxyanisole (BHA) Butylated hydroxytoluene (BHT) Bisphenol A (BPA) Carmine (natural red 4) Cyclamates Eggs Ephedra sinica (Ma Huang) Erythritol Ethyl vanillin Ethylene oxide (ETO) FD&C numbered color pigments Gluten Glycols (propylene glycol) High fructose corn syrup (HFCS) Hydrogenated oils (partially hydrogenated oil, trans-fats) Irradiation Peanuts Polyethylene glycol (PEGs) Propyl gallate Saccharin Sodium benzoate Stearates (stearic acid, magnesium stearate) Sucralose Sulfites (potassium bisulfite, sodium sulfite) Synthetic Vanillin Tertiary buthylhydroquinone (TBHQ) Titanium dioxide *These statements have not been evaluated by the Food and Drug Administration

Although various bio-safety evaluations have provided a series of evidences that MSNs are biocompatible in vivo within desirable dose and they can be degraded and expelled from the body via urine and feces 58,59,60,61 , there remain many challenges that need to be overcome since the in vivo therapeutic use requires more strict performance modulation to satisfy the complicated physiological environment so as to avoid unwanted bio-performances of MSNs
Then consider what percentage of that investment you are willing to lose to preventable degradation
They can produce a temporary skin-brightening effect by reducing melanin production and oxidative stress but they dont permanently whiten skin, and results differ between individuals