Ruruberry 10% Niacinamide + Zinc

I received this product for free from Picky and Ruruberry in exchange for my honest review~ ⭐Ruruberry 10% Niacinamide + Zinc⭐ - cruelty free - fragrance free - PAO is only 6 months 🔅Skin type: Combination & sensitive (oily at T zone, normal at cheeks, below the eyes & around the nose are dry & rough) 🔅Claims: A high strength, concentrated serum specifically formulated to improve post-inflammatory hyperpigmentation, uneven complexion, skin congestion, excess oil & blemish-prone skin with ease. 🔅Texture: The serum is quite thick but surprisingly spreadable, doesn't leave your face sticky, it is very lightweight which I like, though it might take sometimes for it to absorb but in the end still doesn't leave your face sticky nor greasy. 🔅Experience: ❌ I am very sad to announce again that other than the gel cleanser, this serum caused my face sting & burn too. I have tried product with 5% of Niacinamide before & never have I experience skin irritation like this, I'm not sure if my skin cannot tolerate the 10% Nianicamide or the Zinc or because of the Citric Acid in the serum, it will burn for few minutes & so. I have to wait for the burning feeling to subsidized in other to proceed with my moisturizer which is suppose to calm the area & yet when i spread into the burning area it burned & sting along as well. This never happen before when I use this moisturizer for the past few months. ⭕ This serum control the sebum very very well which I am very happy about it. My face tend to be very oily throughout the day or even when I wake up in the morning. But after I use this serum, I woke up with my face being not oily at all which wowed me. It did calmed my breakout a little but I'm not sure if it works for fading dark spots. 🔅Conclusion: This serum might be formulated for any skin type, even sensitive skin & damaged skin barrier skin are able to use it. But if your skin cannot tolerate 10% of Niacinamide/very sensitive skin/skin barrier severely damaged/currently avoiding any harsh ingredient, this might not be for you as it has citric acid inside (one of exfoliant under AHA) & 10% of Niacinamide might be too strong for your skin to handle. 🔅Rate: 3 out of 5 ❗What works for me might not work for you. What doesn't work for me might work wonder for you❗