I can share with you my lightening success and my experience with oral glutathione.
First of all, to anyone who is reading this, it is highly unrealistic to expect to lighten several shades by just popping a pill. It doesn't work that way. If you want smooth, glowing, acne free skin then yes you should use oral gluta with vitamin C everyday. If you are expecting to get lighter, I'm sorry but you won't. The most you will get is an all round brighter complexion with a basic exfoliation and SAP regime. You might even get a shade lighter if you're consistent with said basic regime.
I have lighten several shades but I did use lightening products. The gluta with vitamin C made my results look very natural. No one can tell that I have lighten unless they already knew me.
At one point, I had stop using oral gluta all together, but guess what, my skin although hadn't change or redarken, was looking quit dull and my smile lines came back. Worst of all, my adult acne came back! So now I'm back on gluta and I will never stop. Even if I stop lightening, I don't plan to stop taking oral gluta anytime soon. I am a chronic pimple popper and because of this, I am left with terrible acne scarring.
Does oral gluta lightens? No, it only brightens. Some people have had better luck with it when it came to lightening but they were mostly Asian.
Would I recommend it as part of a skin lightening regime? Absolutely! Why? Because it counteracts the bleached out look that a lot of bleachers have. It gives you an inner glow to go with your new complexion, it prevents you from tanning too easily, and it makes your skin acne free and appear younger.
It is unrealistic to believe that you can lighten by just oral gluta alone. We all know that the absorption rate is not 100%. If I could afford gluta IV trust me I would be getting it, but I can't and I've managed to lighten successfully on a budget.
When I get rich and can afford to lighten with gluta IV I will not forget you guys, I will come in here with testimony and pics and share my results.
And if anyone is wondering, I'm between an NC40 and NC42. NC40 when I'm consistent with my regime and wear sunscreen. NC42 when I'm lazy and go a couple weeks without using lightening products and skipping sunscreen.