Is Vitaran highly effective?

I'm curious about the effects of Vitaran.

I get so upset every morning when I look in the mirror. I don't know why my skin is so dull... I don't think my face used to look like this. It definitely shows that I'm getting older. While searching online, I came across some information about the effects of Vitaran.

Am I the only one whose complexion looks dull these days?

Whitening cosmetics aren't working for me, so I'm looking into skin boosters. I was recommended Vitaran because it's good for skin regeneration and tone improvement. Will my skin tone and texture improve if I take this?

They say it makes your skin moisturized and is good for elasticity... but then some posts say it's not very good, so I'm confused.

Does Vitaran really work?

I wonder if it improves after just one or two uses... or if I need to use it consistently to see results... I saw on YouTube people showing off how their skin became clearer thanks to Vitaran, but I'm wondering if that's just an ad... Since this is my first time trying something like this, I really don't know. My skin is on the sensitive side, so will it be okay? I'm even more worried if it breaks out.