Skin Thickness: How diet, lifestyle, and supplements may provide benefits.

Examine Database: Skin Thickness

Intervention	Grade	Evidence	Effect
Vitamin A	B	Participants: 128	Moderate Increase
Calendula Officinalis	C	Participants: 21	Small Increase

Vitamin A

B

Participants: 128

Moderate Increase

Calendula Officinalis

C

Participants: 21

Small Increase

Intervention	Grade	Effect	Detail
Vitamin A	B
Calendula Officinalis	C

Research FeedRead all studies

Do collagen peptides improve skin and nail health in women with signs of facial skin aging?

In this randomized controlled trial, supplementation with collagen peptides improved some facial skin health parameters in middle-aged East Asian women with signs of facial skin aging.

Is cardio or weights better for rejuvenating aging skin?

Examine Database References

Vitamin A - Weiss JS, Ellis CN, Headington JT, Tincoff T, Hamilton TA, Voorhees JJTopical tretinoin improves photoaged skin. A double-blind vehicle-controlled studyJAMA.(1988 Jan 22-29)
Vitamin A - Griffiths CE, Kang S, Ellis CN, Kim KJ, Finkel LJ, Ortiz-Ferrer LC, White GM, Hamilton TA, Voorhees JJTwo concentrations of topical tretinoin (retinoic acid) cause similar improvement of photoaging but different degrees of irritation. A double-blind, vehicle-controlled comparison of 0.1% and 0.025% tretinoin creamsArch Dermatol.(1995 Sep)
Calendula Officinalis - Akhtar N, Zaman SU, Khan BA, Amir MN, Ebrahimzadeh MACalendula extract: effects on mechanical parameters of human skin.Acta Pol Pharm.(2011)