Physical affection from relationships reduces anxiety and depression and increases immune system function.

Evidence

How Relationships Impact Mental Health—and Vice Versa (Deconstructing Stigma)

corroborated: 2 independent passages support this claim
XREF: connects to: Trusting relationships can bring comfort during difficult times. — Crews, Harry, A childhood the biography of a place, 1026; Social relationships serve as buffers against stress and protective factors against risk for disease. — Recent Developments in the Study of Social Relationships, Stress Responses, and Physical Health; Social support influences relationship satisfaction by acting as a buffer against stress and adversity. — The Role of Social Support in Relationship Satisfaction (+6 more)

Social relationships serve as buffers against stress and protective factors against risk for disease. (similarity 0.89)
Social relationships influence immune processes via two distinct pathways including inflammatory cytokine production sensitive to social threat and support. (similarity 0.84)
Responsive support enhances satisfaction, intimacy, and trust; hostility and blame erode relationship quality. (similarity 0.81)
Supportive relationships provide emotional comfort, practical help, and a sense of belonging during difficult times. (similarity 0.80)
Responsive social support in times of adversity is linked to increased satisfaction, intimacy, and trust in couples. (similarity 0.79)
Positive relationships are characterized by mutual trust, respect, support, and effective communication. (similarity 0.79)
Belonging support was a consistent predictor of self-reported disease outcomes, and perceived support is particularly protective. (similarity 0.78)
Emotional support is an important protective factor for dealing with life’s difficulties. (similarity 0.78)