The growth of the jawline after 18 is possible, particularly for men, but significant changes are less likely.
While most women experience full jaw growth by age 15, many men continue to develop until their early twenties (around 19-23 years old). After this period, further skeletal growth is minimal. Any perceived changes in jawline definition after this age are more likely due to factors like:
- Muscle Development: Specifically, the masseter muscle (used for chewing) can be developed through exercise and diet, which can enhance the appearance of the jawline.
- Fat Loss: Losing facial fat can make the jawline appear more prominent.
- Hydration: Proper hydration can affect the overall appearance of the face.
- Posture: Correct posture can improve the alignment of the head and neck, subtly altering the jawline's appearance.
- Jaw exercises/Mewing: Some people believe that jaw exercises (like "mewing") can improve jawline definition over time, although scientific evidence supporting these claims is limited.
- Surgical or Non-Surgical Interventions: Procedures like fillers, implants, or jaw surgery can dramatically alter the jawline at any age. Note, however, the reference implies that younger patients generally have quicker recovery times from surgery.
In summary, while skeletal jaw growth is unlikely after the early twenties for men and much earlier for women, the appearance of the jawline can be influenced by a variety of factors throughout adulthood. Therefore, while a true growth in bone is unlikely, changes in muscle mass, fat distribution, and other factors can give the appearance of a change in jawline definition.
