Advice: Thinning edges are caused by slow growth, scalp infection or an excessive amount of tension/stress applied to a specific area over a long period of time. To help the hair grow back, the hair follicles need to be rejuvenated to improve blood circulation and promote more hair growth. I've noticed that products containing anti-fungal and anti-microbial properties, help combat dandruff and bacteria off of the scalp. The removal of dandruff/bacteria unclogs the hair follicles allowing the scalp to breathe resulting in faster hair growth since nothing is inhibiting the growth.
Here are a couple options:
a) Rosemary Oil - Needs to be mixed with a carrier oil (too potent otherwise). Known to increase blood flow, therefore, promoting hair growth.
b) Peppermint Oil - Needs to be mixed with a carrier oil (too potent otherwise). Gives a cooling effect/tingle to the scalp, and removes dandruff. Purifies the scalp. Known to increase blood flow, therefore, promoting hair growth.
c) Castor Oil - Cleanses toxins & impurities from the scalp, nourishes and thickens the hair. Stimulates hair growth while moisturizing dry brittle hair.
d) Coconut Oil - Promotes hair growth by revitalizing and exfoliating dead skin tissue from the scalp. Great in removing dandruff so that the scalp/hair follicles can breath and the hair can grow at a faster rate.
e) Aloe Vera Gel/Juice - Includes an enzyme that is beneficial in stimulating new hair reproduction.
f) Vitamin E - Antioxidant that enhances scalp circulation. Helps to increase and improve circulation of your scalp, promoting the growth of healthy hair
g) Miconazole Nitrate - Found in Yeast Infection Creams & Neosporin. Has antifungal properties. If applied to the scalp, it will remove dandruff/bacteria off of the scalp thus promoting hair growth (caution: can cause headaches).
h) Sulfur 8 - Provides a tingling sensation to the scalp. Helps remove dandruff off the scalp. Sulfur does three important functions in our body. It brings about hair growth, strong nails and smooth skin.
i) Mega-Tek - It stimulates and promotes RAPID hair regrowth without the use of silicone, synthetic polymers, oils or petroleum based products. Many ladies have seen great results with this product.
Hope that helps!