Frizzy, unruly hair can feel like a full-time battle—especially in humid or dry climates. For anyone tired of spending hours blow-drying and flat-ironing, smoothing treatments like keratin treatments and Brazilian blowouts offer a game-changing solution. But if you’re weighing your options between the two, it can be difficult to know which one is right for your hair type, goals, and lifestyle.
While both treatments aim to smooth the hair, reduce frizz, and add shine, they differ in formulation, application process, results, and longevity. Let’s dive into the key differences between keratin treatments and Brazilian blowouts to help you decide which one is the better choice for you.
What Is a Keratin Treatment?
Keratin treatments are professional hair-smoothing services designed to replenish the natural keratin protein in your hair. Over time, keratin is stripped away due to heat styling, chemical processing, and environmental exposure. These treatments work by coating the hair with a keratin-based formula, sealing it in with heat, and restoring a smoother, shinier appearance.
The result is softer, frizz-free hair that is easier to style. A keratin treatment doesn’t typically straighten the hair completely—it softens curls and waves, but preserves a more natural texture.
Most keratin treatments require a 24- to 72-hour wait before washing or tying your hair, which allows the product to fully settle. The results can last anywhere from two to six months depending on your hair type, the specific formula used, and how well you maintain it.
What Is a Brazilian Blowout?
A Brazilian blowout is another popular smoothing treatment, but it works a bit differently. It uses a proprietary liquid keratin formula to create a protective protein layer around each strand of hair. What makes this treatment unique is its customizability. Depending on the technique and tools your stylist uses, the Brazilian blowout can leave your hair completely straight or simply reduce frizz while maintaining your natural curl or wave pattern.
Another major selling point is the convenience. Brazilian blowouts can be rinsed out and styled immediately after treatment—there’s no waiting period required. You can leave the salon and wash your hair, put it in a ponytail, or style it as you wish, all on the same day.
In terms of longevity, Brazilian blowouts usually last around three to four months. With the right products and minimal washing, you can stretch the results even longer.
How Do the Results Compare?
When it comes to visible results, both treatments dramatically reduce frizz, enhance shine, and make hair more manageable. However, they don’t deliver the exact same look or feel.
A keratin treatment typically results in softer, smoother hair with a natural finish. It’s best for people who want to maintain some body or curl while taming frizz and improving texture. It won’t leave the hair pin-straight, but it will significantly reduce styling time.
On the other hand, a Brazilian blowout tends to offer more dramatic smoothing and can leave hair almost completely straight—if that’s the goal. The stylist has more flexibility in controlling how sleek or voluminous your hair will look. This makes it a better choice for those who want a specific finish, whether that’s straight and glossy or soft and wavy.
Application Process and Time Commitment
Both treatments start with washing the hair using a clarifying shampoo to remove buildup and open the cuticle. From there, the main product is applied and then sealed in using a blow dryer and flat iron.
Keratin treatments usually take longer—often between two to four hours depending on hair length and density. Once complete, you may need to avoid washing, sweating, or tying your hair back for up to three days. This can be a dealbreaker for those with a busy or active lifestyle.
Brazilian blowouts are often quicker, taking about 90 minutes to two hours. They also don’t come with that awkward waiting period—once the treatment is complete, you’re free to go about your routine as usual.
Longevity and Maintenance
Both treatments offer semi-permanent results, but keratin treatments generally last longer, especially on hair that’s dry, porous, or chemically treated. You can expect smoother, more manageable hair for anywhere between two and six months, depending on how often you wash your hair and how well you maintain it.
Brazilian blowouts tend to last around three months, although some people find the results begin to fade slightly sooner. Since the effects are more customizable, they may not last quite as long if a softer finish was chosen during the treatment.
In either case, longevity heavily depends on aftercare. Sulfate-free shampoos and conditioners are a must. Avoiding chlorine, saltwater, and excessive washing can also help extend the life of the treatment.
Hair Type Considerations
Your hair type plays a major role in deciding which treatment is better suited for you.
Keratin treatments are ideal for those with wavy, frizzy, or dry hair who want to smooth their hair without losing too much of its natural volume or curl pattern. If you’re trying to improve texture and manageability while still keeping some movement, this is a great option.
Brazilian blowouts, however, work on virtually all hair types—including thick, curly, coarse, or chemically treated hair. Because the process can be tailored to each client, it’s especially beneficial for those looking for a more defined transformation. If your goal is sleek, polished, and pin-straight hair, the Brazilian blowout may be your best bet.
Safety and Ingredients
Both treatments have faced scrutiny for containing formaldehyde or releasing formaldehyde gas when heated. This chemical is known to be a health concern when inhaled in high concentrations.
Today, many brands offer formaldehyde-free versions, but it’s important to ask your stylist about the specific product being used. Some products use alternative aldehyde-based compounds that can still release irritants when exposed to high heat. Make sure the salon is well-ventilated and that the stylist follows all safety protocols.
If you are pregnant, have respiratory sensitivities, or are concerned about chemical exposure, opt for a certified formaldehyde-free keratin treatment and consult with your stylist in advance.
So, Which One Is Best?
The answer depends on your individual hair goals, texture, and lifestyle.
If you're looking for a treatment that offers long-lasting frizz control while maintaining your natural hair texture, and you don't mind a short waiting period, a keratin treatment may be the better choice. It offers a more natural finish and gradually fades over time without a harsh grow-out line.
If you're someone who wants immediate results, more customization, and the freedom to wash and style your hair right away, the Brazilian blowout is likely the best option. It’s also more flexible in terms of how straight or smooth you want your hair to look.
Final Thoughts
Both keratin treatments and Brazilian blowouts can transform the way your hair looks and feels, saving you time and effort when it comes to daily styling. Ultimately, the best choice comes down to your personal preferences, hair condition, and desired results.
If you’re still unsure which smoothing treatment is right for you, speak to a trusted stylist who can evaluate your hair and recommend the most suitable option. Either way, investing in a high-quality smoothing treatment can be the key to healthier-looking, effortlessly styled hair you’ll love for weeks to come.
