NioxinDensity Defend Diamax Advanced Hair Thickening Serum With Caffeine, Niacinamide & Panthenol For Thicker, Fuller-Looking Hair 3.38 Fl oz

I don't know the science behind this, but my hair looks significantly thicker every time I use this product. I struggle with severely thin hair and this has made my hair completely transform. It has the same effect from when you leave the hair salon and your hair feels thicker, shinier (not greasy) & more voluminous. 10/10 will be buying again.

I started using Nioxin Diamax Hair Thickening Treatment, and I couldn't be more impressed! As someone with fine hair that tends to fall flat, I've tried numerous products, but this one truly stands out.First, the application process is straightforward. The lightweight formula absorbs quickly, and I love that I can apply it to towel-dried hair without any heavy residue. After just one use, I noticed an immediate difference in volume and thickness. My hair looked fuller and felt healthier, which is a huge confidence booster!I've been using it consistently for a few weeks now, and the results have only gotten better. My hair not only looks thicker but also feels stronger. Plus, I love that it doesn't weigh my hair down or make it greasy.If you're struggling with fine or thinning hair, I highly recommend giving Nioxin Diamax a try. It's become a staple in my hair care routine, and I can't imagine going without it now!

I love all products from nioxin. It works great - seeing new hair growth and spots filling back in is wonderful! Love it

Highly recommend for thickness, good for all textures and sizes of hair. It hasgood value and durable.

I’ve been using this serum with every wash, and it has been amazing! I’ve noticed a significant improvement in new hair growth, and my hair looks and feels thicker and fuller. The formula, enriched with caffeine, niacinamide, and panthenol, seems to work wonders for strengthening and nourishing my hair.

It took a while but it has helped the thickness of my hair!

Started using this on my crown to help with hair regrowth and I can tell new baby hairs have started to blossom. Hair growth:Yes yes yes

I’m 67, and have fine, quite thin hair that has thinned some over the last few years. Today is my third day of use, and WOW, what a difference! I’m using a volumizing mousse with it, and can’t believe how much thicker my hair looks. It also has stopped breaking. I’m totally sold, and have subscribed. Yes, it’s expensive, but it’s the best thing I’ve ever used on my hair/scalp for volume.