---
product_id: 187429774
title: "- Fine Hair Shampoo - Biotin Thickening Shampoo for Flat, Thin Hair - Volumizing & Strengthening Keratin & Chia Seed Oil for Women & Men - Lightweight, Color-Safe, Sulfate Free, 10 Oz"
brand: "ouai"
price: "$74.69"
currency: USD
in_stock: true
reviews_count: 13
category: "Ouai"
url: https://www.desertcart.us/products/187429774-fine-hair-shampoo-biotin-thickening-shampoo-for-flat-thin-hair
store_origin: US
region: United States of America
---

# Hydrolyzed Keratin smooths & adds shine Chia Seed Oil volumizes without weight Biotin boosts strength, reduces breakage - Fine Hair Shampoo - Biotin Thickening Shampoo for Flat, Thin Hair - Volumizing & Strengthening Keratin & Chia Seed Oil for Women & Men - Lightweight, Color-Safe, Sulfate Free, 10 Oz

**Brand:** ouai
**Price:** $74.69
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your fine hair game with volume that speaks louder than words!

## Quick Answers

- **What is this?** - Fine Hair Shampoo - Biotin Thickening Shampoo for Flat, Thin Hair - Volumizing & Strengthening Keratin & Chia Seed Oil for Women & Men - Lightweight, Color-Safe, Sulfate Free, 10 Oz by ouai
- **How much does it cost?** $74.69 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/187429774-fine-hair-shampoo-biotin-thickening-shampoo-for-flat-thin-hair)

## Best For

- ouai enthusiasts

## Why This Product

- Trusted ouai brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Layer Your Luxe Routine:** Pair with OUAI Fine Conditioner and Thickening Spray for a full-volume effect that turns heads.
- • **Bounce That Lasts All Day:** Experience major volume and lift without the heavy feel—fine hair’s new best friend.
- • **Clean Beauty, No Compromises:** Sulfate, paraben, phthalate, and gluten-free formula that’s safe for color and chemically treated hair.
- • **Signature Mercer Street Scent:** Elevate your shower with fresh Italian lemon, iris, and white musk notes—because your hair deserves to smell as good as it looks.
- • **Stronger Strands, Zero Breakage:** Biotin and keratin team up to fortify your hair from root to tip, reducing split ends and damage.

## Overview

OUAI Fine Hair Shampoo is a sulfate-free, color-safe volumizing shampoo infused with biotin, hydrolyzed keratin, and chia seed oil. Designed specifically for flat, thin hair, it strengthens strands, reduces breakage, and delivers lasting bounce with a lightweight feel. Perfect for both men and women, this 10 oz formula is cruelty-free and free from harsh chemicals, making it a clean, effective choice for fine hair that craves volume and shine.

## Description

Shop Hair Care Visit the Store Shop Hair Care Visit the Store Shop Body Care Visit the Store Shop Body Care Shop By Scent Visit the Store Shop By Scent

Review: Does the job! - A couple of weeks ago, I tried Ouai leave-in conditioner, which I liked right away. So I decided to try the Fine Hair Shampoo. Afterwards, my hair was silky-smooth and shiny—much more so than with other shampoos I've tried. Not sure if it thickened up very much, but no biggie. I really like the shampoo, which has a pleasing, delicate scent and produces LOTS of suds. I got the travel size for the initial tryout but will buy the regular size next.
Review: An excellent shampoo - I've just started using Ouai, so I can't comment about long-term use, but my initial reaction is certainly favorable. It smells great, but the scent isn't at all overwhelming during the shampoo or afterwards. The shampoo is expensive, but it takes only a small amount to create really luxurious suds. I haven't noticed that my hair feels thicker, but it is definitely softer and shinier, and frizziness has been tamed.

## Features

- Turn The Volume All The OUAI Up: Is volume just a button on your phone? This thickening shampoo delivers major bounce and lasting volume with a gentle clean that doesn't strip. So you can finally be fine with being fine.
- Stronger Strands, Less Breakage: Biotin reduces breakage, hydrolyzed keratin smooths and adds shine, and chia seed oil thickens and volumizes without weighing hair down. Apply to roots and work through to ends.
- A Clean Formula You Can Feel Good About: Free of sulfates, parabens, phthalates, and gluten. Safe for color-treated, keratin-treated, and chemically-processed hair. No harsh trade-offs for fine hair.
- Pair It For Best Results: Follow with OUAI Fine Conditioner to lock in volume without weight. Layer in OUAI Thickening Spray for extra lift. The full routine will have you feeling fine.
- OUAI Hair, Body & Fragrance: This thickening, volumizing shampoo is made to transport you wherever you go, with a Mercer Street scent featuring notes of Italian lemon, iris, and white musk.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B084BW599K |
| Active Ingredients | Biotin, Chia Seed Oil, Hydrolyzed Keratin |
| Age Range (Description) | Adult |
| Age Range Description | Adult |
| Best Sellers Rank | #1,622 in Beauty & Personal Care ( See Top 100 in Beauty & Personal Care ) #44 in Hair Shampoo |
| Brand | OUAI |
| Brand Name | OUAI |
| Customer Reviews | 4.5 out of 5 stars 4,306 Reviews |
| Hair Type | Fine |
| Item Dimensions | 2.5 x 2.5 x 5.5 inches |
| Item Form | Liquid |
| Item Weight | 0.79 Pounds |
| Liquid Volume | 10 Fluid Ounces |
| Manufacturer | Ouai |
| Manufacturer Part Number | 2532 |
| Material Type Free | Gluten Free, Paraben Free, Phthalate Free, SLS Free, Sodium Laureth Sulfate Free |
| Model Number | 2532 |
| Number of Items | 1 |
| Other Special Features of the Product | Not Tested On Animals |
| Product Benefits | Volumizing |
| Recommended Uses For Product | Split Hair |
| Scent | Mercer Street |
| Scent Name | Mercer Street |
| Suitable Hair Color | All Hair Colors |
| UPC | 815402021269 |
| Unit Count | 10 Fluid Ounces |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** OUAI
- **Hair Type:** Fine
- **Item Form:** Liquid
- **Scent:** Mercer Street

## Images

![- Fine Hair Shampoo - Biotin Thickening Shampoo for Flat, Thin Hair - Volumizing & Strengthening Keratin & Chia Seed Oil for Women & Men - Lightweight, Color-Safe, Sulfate Free, 10 Oz - Image 1](https://m.media-amazon.com/images/I/511SN3d82fL.jpg)
![- Fine Hair Shampoo - Biotin Thickening Shampoo for Flat, Thin Hair - Volumizing & Strengthening Keratin & Chia Seed Oil for Women & Men - Lightweight, Color-Safe, Sulfate Free, 10 Oz - Image 2](https://m.media-amazon.com/images/I/71RPSH5f96L.jpg)
![- Fine Hair Shampoo - Biotin Thickening Shampoo for Flat, Thin Hair - Volumizing & Strengthening Keratin & Chia Seed Oil for Women & Men - Lightweight, Color-Safe, Sulfate Free, 10 Oz - Image 3](https://m.media-amazon.com/images/I/71HLFnckEGL.jpg)
![- Fine Hair Shampoo - Biotin Thickening Shampoo for Flat, Thin Hair - Volumizing & Strengthening Keratin & Chia Seed Oil for Women & Men - Lightweight, Color-Safe, Sulfate Free, 10 Oz - Image 4](https://m.media-amazon.com/images/I/71TDRMywtjL.jpg)
![- Fine Hair Shampoo - Biotin Thickening Shampoo for Flat, Thin Hair - Volumizing & Strengthening Keratin & Chia Seed Oil for Women & Men - Lightweight, Color-Safe, Sulfate Free, 10 Oz - Image 5](https://m.media-amazon.com/images/I/71yveA3qpnL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Is the fine hair shampoo vegan?**
A: No it will not fade your color.

**Q: What does it smell like?**
A: One of the best smelling shampoos I’ve ever used! Light but still clean and a little floral? The perfect amount of scent.

**Q: Does the thick shampoo add volume?**
A: This is for people with Thick hair! It does Not help to achieve thick hair. It helps to calm the frizz, moisturizes and makes it shiny and sleek and a lovely rose scent.  Do not buy if you want to thickening your hair! This is not for fine/thin or thinning hair. It makes most people with fine/thin or thinning hair overwhelmed by the scent and the amount of conditioning. Usually leaving the hair feeling oily, weighed down and leaving them overwhelmed by the strong scent. I have not tried the fine hair shampoo but I can not recommend using this if your hair isn’t Thick! It works magic on my horse main (I’m Italian) and I have high end, low end and in between and this has given me the best results.

**Q: Can this be used on super fine hair?**
A: Yes, my hair is super fine and curly and I love the shampoo. Just don't like the container opening. Difficult to open due to my arthritis

## Customer Reviews

### ⭐⭐⭐⭐⭐ Does the job!
*by Z***H on April 12, 2026*

A couple of weeks ago, I tried Ouai leave-in conditioner, which I liked right away. So I decided to try the Fine Hair Shampoo. Afterwards, my hair was silky-smooth and shiny—much more so than with other shampoos I've tried. Not sure if it thickened up very much, but no biggie. I really like the shampoo, which has a pleasing, delicate scent and produces LOTS of suds. I got the travel size for the initial tryout but will buy the regular size next.

### ⭐⭐⭐⭐⭐ An excellent shampoo
*by D***P on April 14, 2026*

I've just started using Ouai, so I can't comment about long-term use, but my initial reaction is certainly favorable. It smells great, but the scent isn't at all overwhelming during the shampoo or afterwards. The shampoo is expensive, but it takes only a small amount to create really luxurious suds. I haven't noticed that my hair feels thicker, but it is definitely softer and shinier, and frizziness has been tamed.

### ⭐⭐⭐⭐⭐ Strong, nice, scented thickening for thin flat hair shampoo - works.
*by D***C on April 10, 2026*

It does what it indicates - thickens the strands. A bit drying, but my conditioning spray takes care of it. A very perfumey scent, on the strong side, and stays throughout the day. Clashes with my perfume, but has a unique nice smell on its own. I purchased the smallest size and I’m glad I did. Will use it for travel, and in between washes with my regular shampoo.

## Frequently Bought Together

- OUAI Fine Shampoo - Volumizing Shampoo with Strengthening Keratin, Biotin & Chia Seed Oil for Fine Hair - Delivers Clean, Weightless Body - Paraben, Phthalate & Sulfate Free Hair Care (10 Fl Oz)
- OUAI Fine Hair Conditioner - Volumizing Conditioner for Fine Hair Made with Keratin, Biotin and Chia Seed Oil - Adds Softness, Bounce and Volume - Free from Parabens, Sulfates, and Phthalates (10 Oz)
- OUAI Detox Shampoo - Clarifying Shampoo for Build Up, Dirt, Oil, Product and Hard Water - Apple Cider Vinegar & Keratin for Clean, Refreshed Hair - Sulfate-Free Hair Care (10 oz)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-20*