This shampoo gives such a noticeable boost in thickness and volume. My hair instantly feels fuller and looks healthier after every wash. The biotin and collagen blend leaves my strands stronger, smoother, and less fragile, especially near the ends. It smells amazing — fresh but not overpowering — and the shine it adds is honestly so pretty. It lathers well without drying my scalp and rinses clean without leaving residue. Overall, it's a great choice if you want fuller-looking, soft, shiny hair that feels more lifted and voluminous.

I bought this recently, Oct 2025 only to find a new formula. Why??? It's thinner, doesn't lather as well, not rich and creamy and leaves hair flatter. The old formula you feel the body coming into your hair. After blowdrying using the new formula hair is less volumised. The hunt for a new shampoo begings I guess. Why do brands do this to stuff that worked. Won't buy it any longer after yrs of using it.

Used for about 3 months and lost about 59% of my hair. I wasn't sure if it was related but after seeing my hair stylist, she mentioned there were lawsuits associated with this exact shampoo and hair loss. I'm now seeing a dermatologist and am on medication and specialized shampoo to regrow my hair.

OGX makes such good products. I personally love this kind for my hair type. I have medium thickness, long, straight hair. This is perfect for me. It leaves my hair feeling clean even when I only wash once a week. I think they are a great price, especially because you can almost always find coupons for this. The only annoyance I have is the bottles/lids are curved so you cannot leave them upside down to help with getting the product out.

The OGX Thick & Full + Biotin & Collagen Volumizing shampoo works wonderfully! It leaves my hair feeling thicker, fuller, and healthier without weighing it down. After just a few uses, my hair looked more voluminous and had great bounce. It smells amazing, lathers well, and rinses clean without leaving residue. Perfect for fine or flat hair, and a little goes a long way. I'm very happy with the results— I will never use anything else!

This shampoo gives my hair a nice boost of volume and makes it feel fuller and thicker after each wash. It lathers well, rinses clean, and doesn't leave residue. The biotin and collagen formula helps my hair feel stronger and healthier over time. Great for fine or flat hair.

I've been using this OGX Biotin & Collagen shampoo and I've really enjoyed it. It gives my hair a fuller, more textured feel without weighing it down. The formula is gentle and doesn't leave buildup, and I like that it's sulfate-free. My hair feels soft, a bit thicker, and has more movement after I use it. If you're looking for a shampoo that adds volume while still keeping your hair feeling healthy, this is a great option.

Started using this product on the advice of my hairdresser when I had my extensions fitted (weave) This was over 12 months ago and my extensions are still in immaculate condition! I can only put it down to this shampoo combined with the conditioner. Left one star off as I find it doesn't foam too well but thats not an issue, just personal preference

I have used OGX products for many years. They have a great variety and affordable. I like this particular option as it adds shine and softens to my hair. However, it could be a little heavy for some so switching up your hair care every so often helps with that.

This is a really good shampoo to thicken hair. It has a most unique scent. It smells powdery yet musky. I didn't like it at first but the scent grew on me as I continued to use the shampoo. It is a strong scent that stays in your hair all day long. My hair feels soft and manageable and definitely more volumized after use.