Nit (niacinamide) ek water-soluble form hai vitamin B3 ka, jo skincare mein use hota hai skin barrier ko support karne ke liye, sebum ko regulate karne ke liye, aur hyperpigmentation aur redness kam karne ke liye. Yeh generally sabhi skin types ke liye well tolerated hota hai aur isko commonly combine bhi kiya jaata hai doosre ingredients ke saath.