Why this works
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Your face is 43 muscles. Most of them are never trained.

Half the face shown as muscle, half as skin
BK·FIG 0143 units

Unlike the body, facial muscles attach directly to the skin. When they lose tone, the skin descends. When they are trained, it lifts. This is physiology, not magic.

JAMA Dermatology, 2018. Participants who performed facial exercises daily for 20 weeks were rated “three years younger” by blinded dermatologist assessors.