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Hey friends, molly here with a follow-up review on the Concentrated Firming Serum by Kayo. After using it for about a month on my upper arms and thighs, I've noticed a slight tightening and toning effect on my skin. It's not a dramatic change, but it's definitely there. The serum does have a tingling sensation upon application, which personally doesn't bother me, but it's something to be aware of if you're sensitive. However, I do have to mention that the bottle doesn't last very long, even with limited use. Overall, the Kayo Firming Serum delivers a noticeable firming effect, but it's not long-lasting.
