It is done in three to four sessions at two to four week intervals. Hydration is felt between immediately and two weeks, because the small molecules soak in first and the large ones settle afterwards. It disappears as it is absorbed, so keeping the result means repeating.

Hydration is felt right after the session, and fine lines ease over two weeks. The small molecules soak in quickly and relieve tightness at once. Fine lines need moisture to build and the skin to plump before they shallow out, so they take a little longer.

Both fill the skin with hyaluronic acid. Hilo Wave mixes two molecular sizes so it aims at fast absorption and lasting presence at once. Where a water-glow injection concentrates on immediate hydration, Hilo Wave also builds in duration. Both fade as they are absorbed, so both assume repeat sessions.