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From the Lance Armstrong site:

Rose hip seed oil benefits

Rose hip seed oil is a rich orange to pale yellowish oil that is made from the seeds of a type of natural growing rosebush found in the Andes Mountains region of South America. According to UncleHarry's.com, rose hip seed oil was recognized for its healing properties and utilized by the Andean Indians for many years. Today, rose hip seed oil is being used all over the world and is known for its healing benefits.

Skin Moisturizer

Rose hip seed oil is often used as a skin moisturizer. According to rosehipoil.com, rose hip seed oil can be used in both the daytime and overnight. It benefits the dry areas without over-moisturizing the normal areas of the skin. As a moisturizer, rose hip seed oil can be purchased online as a cream or lotion and is suitable for daily use.

Hair Care

Rose hip seed oil is safe to use on the hair and scalp and provides many restorative benefits. You can use rose hip seed oil as a hot oil treatment on dry, damaged or brittle hair. For dandruff or dry scalp, apply rose hip seed oil directly to the scalp and massage it into the skin. According to rosehipoil.com, rose hip seed oil has a low pH and is safe and gentle enough to be applied directly to the hair and scalp.

Curative Effects on Skin Flaws

When used on scars and stretch marks, rose hip seed oil can aid in reducing the redness and puffiness that often occurs with scar tissue. According to UncleHarrys.com and rosehipoil.com, rose hip seed oil can safely be applied as soon as the wound is completely healed and any stitches have been removed. Thoroughly cleanse the area and gently massage the oil into the scarred area. Rose hip seed oil can also be used on scars that have resulted from acne, burns and irregularities in skin pigmentation, however it is not recommended for extremely oily skin. Result can be seen in as little as three to four months with regular application. Older, more severe scars may take longer to fade.

Anti-aging Properties

Signs of aging can be reduced by using rose hip seed oil products. Rose hip oil can also be used to slow down the signs of aging and give the skin a firmer, softer and smoother appearance. Preventative treatment for signs of aging is recommended to begin as early as age 20, according to rosehipoil.com. Rose hip seed oil can reduce the signs of aging that occur due to sun damage and collagen reduction.

References
Rose Hip Oil: Benefits
Uncle Harrys: Rosehip Oil for Skin Rejuvenation
Aromatic: Rosehip seed oil
"The Aromatherapy Bible"; Gill Farrer-Halls; 2005

Read more: http://www.livestrong.com/article/119539-benefits-rose-hip-seed-oil/#ixzz20j45o2Ti

See here for many benefits of Rose Hip Oil:  http://www.inkanat.com/en/natural_cosmetics/rosehip_oil.html