4 Oils for Skin Care + The Studies to Support Them

1. Olive oil - reduce UVB-induced skin tumors

A 2000 study suggests that topical application of virgin olive oil after UVB exposure can reduce UVB-related skin tumors.  The thought is that the antioxidant power of the oil is responsible for this benefit.  (Extra virgin olive oil is said to have a "potent antioxidant effect".)

SOURCES:
PREVENTATIVE EFFECT OF OLIVE OIL AGAINST UV-INDUCED SKIN CANCER (2000)
PREVENTATIVE EFFECT OF OLIVE OIL AGAINST PHOTOCARCINOGENESIS (2000)
VIRGIN OLIVE OIL AS A SKIN PROTECTOR (2009)

2. Argan oil - combat hyperpigmentation

According to a 2013 study, argan oil may be effective against hyperpigmentation disorders (e.g., acne scarring, chicken pox scarring). 

SOURCES:
ARGAN OIL AGAINST HYPERPIGMENTATION (2013)

3. Avocado oil - increase collagen and heal wounds

A few studies have demonstrated that this oil can increase soluble collagen (when consumed) AND help to heal wounds better than petroleum jelly (when applied topically).  

SOURCES:
AVOCADO OIL ON SKIN COLLAGEN METABOLISM (1991)
EFFECT OF AVOCADO OIL ON WOUND HEALING (2013)

4. Grapeseed oil - reduce blackheads, whiteheads, and UV-induced hyperpigmentation

A 1998 study demonstrated lightening effects on UV-induced hyperpigmentation (i.e., a tan) after topical application of linoleic acid. Additionally this fatty acid has demonstrated a potential to effectively reduce the size of blackheads and whiteheads.  

Since grapeseed oil contains a large amount of linoleic acid, it makes you wonder if it would have all of these effects. Maybe you can do your own personal experiment.

SOURCE:
ABSTRACT ON LINOLEIC ACID LIGHTENS UV-INDUCE HYPERPIGMENTATION (1998)
LINOLEIC ACID STUDY - COMBAT ACNE (1998)

You can find many of these oils at From Nature with Love.