Hyaluronic acid (HA) can generally be used daily, and most skincare experts recommend applying it once or twice a day for optimal hydration benefits. It is safe and suitable for all skin types and can be integrated into both morning and evening skincare routines. Here are some key guidelines:

• Use HA on clean, damp skin to help it draw in moisture effectively.
• Apply a pea-sized amount of HA serum after cleansing (and toning if applicable), then follow with a moisturizer to lock in the hydration.
• Consistency is important; regular use every day helps improve skin hydration and texture over time.
• HA works well with other skincare actives and can even be mixed with moisturizers for extra hydration.
• Some suggest starting with once a day, especially if you have oily skin or sensitivity, and potentially increasing to twice daily use as tolerated.

In summary, twice daily use of hyaluronic acid—morning and night—is recommended by many skincare sources, with the important note to apply it on damp skin and follow with a moisturizer to prevent dehydration.