The square finger, moving here and there, lighted suddenly on Bitzer, perhaps because he chanced to sit in the same ray of sunlight which, darting in at one of the bare windows of the intensely white-washed room, irradiated Sissy.
About 90% of the skin's thickness is from the dermal layer of the skin, and much of the variation in skin thickness there is due to variations in collagen and elastin levels.ollagen and elastin break down with age. A gradual decrease in subcutaneous fat in the hypodermal layer of the skin also occurs with age, further decreasing skin thickness. Variations in thickness of these layers have the most dramatic effect on skin appearance.
Therefore, the outer layers of the epidermis are provided with less nutritional support than the underlying cells. Dietary interventions to affect skin health may be limited in effect and slow to occur. Unique among organs, the skin may be directly affected by the use of topical applications. The stratum corneum prevents the passage of many different types of molecules, but some compounds pass through to the underlying layers.