We often focus on collagen, muscles and cartilage to prevent sagging skin, but we forget about the role of bone.

Over time, your skull naturally loses density, which can cause your face to sag. So, if you’re skipping those calcium-rich foods, think again.
and also if you avoid / do not sunbathe enough
Vitamin D3 is crucial not only for the development of our bones, but also for their maintenance.

Because your body needs vitamin d3 to inhibit high PTH hormone.
High parathyroid hormone decalcifies your face, and shifts calcium to the soft tissues.
What preserves calcium in your bones are a couple of factors, two of which are vitamin D, and cO2.
When bones atrophy, faces sag, and well-developed bones make our skin "tighter" so to speak.

Over time, your skull naturally loses density, which can cause your face to sag. So, if you’re skipping those calcium-rich foods, think again.

and also if you avoid / do not sunbathe enough
Vitamin D3 is crucial not only for the development of our bones, but also for their maintenance.

Because your body needs vitamin d3 to inhibit high PTH hormone.
High parathyroid hormone decalcifies your face, and shifts calcium to the soft tissues.
What preserves calcium in your bones are a couple of factors, two of which are vitamin D, and cO2.
When bones atrophy, faces sag, and well-developed bones make our skin "tighter" so to speak.