No, the formula is designed to be lightweight. The product description describes it as a lightweight leave-in serum that absorbs quickly and does not leave a greasy finish. It is specifically a good fit if your hair is fine and easily weighed down, or if you want smoother, more glossy hair without dense styling products.
That said, the amount you use matters. Even a lightweight serum can feel heavy if you apply too much. Start with a small amount, especially if your hair is fine or thin. Apply it mainly to the scalp and massage in, rather than saturating the lengths. If your hair is coarse or thick, you may need a little more, but it is still best to build up gradually.
The formula contains glycerin and betaine, which add light hydration. This helps keep the lengths from feeling dry without making them look oily. It also contains niacinamide, which is included to help maintain a balanced skin barrier and a neater-looking root area, especially if the scalp becomes oily quickly.
If you have a very oily scalp, keep the serum on the roots and avoid the lengths. This product is not a substitute for a rich hair oil or mask; it is a leave-in step between washing and styling. For extra moisture on the lengths, use a separate conditioner or leave-in conditioner.