I use a hair lotion called ORS Carrot Oil and I have a face mask called Yes To Carrots Exfoliating and Soothing Mud Mask.  Until now, I have not really given it much thought that the main ingredient used in these products is a carrot.  Which means, that carrots should be very beneficial to hair and skin.  It stands to reason that if it is commercially prepared for hair and skin, the little orange vegetables that are available every year from the farmers market are in fact extremely good for the body both internally and externally.
What is so beneficial about this orange veggie that it can be used topically?  Well, internally, carrots contain beta-carotene which is converted to vitamin A by the body.  This nutrient wards off cancers, helps prevent heart disease and helps you to see better.   As for your hair and skin, carrots are very useful externally to revitalize dull and tired looking skin and hair, will leave your skin and hair looking youthful and fresh and it helps to prevent hair loss.
So what can you do at home to incorporate carrots into your hair regimen? You can drink the juice of a carrot every day!  Recent research results from Harvard University suggest that people who eat more than five carrots a week are much less likely to suffer a stroke than those who eat only one carrot a month. Besides this study, anecdotal evidence suggests that people who drink carrot juice and other vegetable juices daily can avoid hair issues such hair loss, baldness, hair dryness and oiliness, hair breaking and shedding.
The following are three ways to use carrots at home topically. This way, you can get the direct goodness of your organic carrots topically without buying expensive commercial products:
The following recipe provides multiple benefits for hair care and growth. Using carrots and honey increases hair sheen, reduces dry scalp, minimizes hair loss and preserves natural elasticity.
Ingredients:
2 Carrots
2 Tbsp Honey
1 Tbsp Olive Oil
1 tsp Vitamin E Oil
Directions:
Juice your carrots in a juicer. If you don’t own a juicer, blend the carrots in as little water as possible.   Strain the carrots.   Warm up the honey olive oil and vitamin e oil in a saucepan.   Add this mixture to the carrot juice.   Apply mixture to damp hair, coating it completely from root to ends.   Cover with a plastic cap and leave in your hair for at least an hour or as long as you have the time (overnight will yield great results.)   Wash the mixture from the hair, preferably with a sulfate free shampoo and then rinse well.   Style as usual.
This recipe is especially useful for areas of the body that are especially dry including elbows and knees.
Carrot and Avocado Moisturizing Mask
Ingredients
1-Tablespoon Brown Sugar
1/2 Avocado
1 Medium Sized Carrot
2 Tablespoons Extra Virgin Olive Oil
Method: First, grate your carrot preferably on the smallest part of your grater. Remove the skin of your avocado and mash until it is very soft.   Next, mix together the carrot avocado, olive oil and brown sugar.   Stir until all the pieces are thoroughly mix, leave for 20 minutes to ensure all the ingredients are soaked in and mixed well together.
Prepare the area of the body where you will be putting the mask by washing first, preferably with warm water.   Scoop the mixture out and rub it in a circular motion – the sugar will wipe away dead skin and the other ingredients will moisturize.   Let the mask set (20 -30 minutes) and rinse away with warm water.   Finish with cold water.   If done consistently on the elbows and knees, the skin will soften over time.
source: http://blackhairmedia.com/beauty/carrots-hair-and-skin-care-oh-my/