This is a great product to use if you want to have thicker hair. It doesn't take a while to start seeing results but when paired with the shampoo it works just fine. I love how it always leaves my hair really soft. I like this product very much and recommend it.

I have to constantly rotate the brand of shampoo/conditioner I use. This product and this bottle specifically is in my rotation. Not only does it smell good, it works extremely well with my thick, straight and dyed hair. I've tried other versions of the OGX shampoo/conditioner and this is my favorite.

[This review was collected as part of a promotion.] I was wary of trying this shampoo because strengthening/thickening shampoos usually leave my hair oily or leave a weird residue that weighs down my hair. This shampoo has not done that. It has left my hair feeling smooth and soft, and has helped with frizziness/flyaways and roughness. I haven’t really used it long enough to comment on the strengthening/thickening aspect. I’ll have to see after using it awhile longer. I like that it is sulfate-free, paraben-free, and dye-free. It does have a strong scent, so if you don’t like strong smells you may not like this. It does fade a bit in your hair after rinsing and drying, but the smell lingers in the bathroom. It has a sort of musk smell in my opinion (the product info on Ulta states the scent is bergamot, jasmine, and vanilla). It’s not my favorite scent, but I don’t mind it. This bottle size retails for $5.97 on Amazon and $6.97 at WalMart, which I feel is acceptable. *I received this product complimentary from Influenster for my honest review.*

Most of my life I had very thin, brittle hair. It was strange because being African-American, we usually have coarse, thick hair. My mom cut ALL my hair off when I was about 13 because she said it wasn't growing and I needed to start fresh. About a year ago, I stop chemically relaxing my hair and straightening it. I got this shampoo and conditioner and since then my hair has done a complete 360! My hair is SO thick now. It has grown so much and is verg healthy! The little hair I had in my crown area is now full again. Thank you OGX! Holy grail for sure!!!

I have always had fine, thin hair. A "friend" once called it mouse hair....well I don't have mouse hair anymore. I saw an advertisement in a magazine for Ogx Biotin & Collagen Shampoo and Conditioner. I actually read the ad and bought some immediatey I have just finished my first bottle and it has done wonders for my hair. My hair is full and thick...it is just amazing. Please don't ever stop making these 2 products. I have always used only a tiny bit of conditioner, because a lot would make my hair look like dirty. But with Ogx biotin & collagen conditioner I use a very generous amount and my hair shines and looks wonderful. I am a very happy Senior Citizen!

i LOVE this shampoo, as well as the conditioner! it leaves my hair smelling soooo good. it reminds me of the old pink sugar hair perfume! my hair feels stronger, i can tell there are no harsh chemicals in this shampoo! i would recommend this shampoo and conditioner the most out of other OGX brands.

My favorite hair care product I own! I use both the shampoo and conditioner and my hair has dramatically gotten stronger! I also have noticed it become more fuller too. I have been using this product for over a year and I don't plan on ever stopping!

Absolutely love this brand and the variety of their products. With shampoos and conditioners that aim to treat a number of hair and styling needs. It makes my hair thicker, It leaves it looking/smelling great and much easier to handle. I also love that it contain biotin and collagen which helps with the growth and strength of my hair.

I have had fine and oily hair my whole life. I was tired of spending so much money on shampoo and conditioner that would cause my hair to fall whenever I was. I used to use TRESemme and dove and still had oily hair the next day and constant falling strands when I was. When I purchased this product, all changed. I felt my strands feeling stronger and surprisingly fuller. I didn't have any strands break off and this product made me a believer. I love this product!!

Not such a great experience. The ingredients are not natural and you can’t even see the back of the bottle. It clearly states on the back of the bottle “to create fuller looking, skinny hair.” It gives you the illusion of thick hair it can’t actually claim it will make your hair fuller because it can’t. It’s like a bad boyfriend, looks great at first but after investment a terrible terrible idea later.