Key Takeaways

• Each serum takes a different approach: Trybello energizes follicles directly, Ouai focuses on adaptogen-powered hydration, and Olaplex targets scalp barrier repair.
• Trybello Hair Helper Spray users often report hair changes within 4 weeks, Ouai has a 90+ day timeline, and Olaplex's softer-hair results appear at 4 weeks.
  
• Trybello is backed by a 120-day growth guarantee, a commitment neither Ouai nor Olaplex currently offers.
• With a formula built around biotin, caffeine, and castor oil, our Trybello Hair Helper Spray nourishes the scalp and actively supports thicker, fuller-looking hair in just 120 days.

Why Choosing the Right Scalp Serum Matters

Hair thinning rarely has a single cause, and the serum you choose should reflect what your scalp actually needs. Some formulas work to hydrate a dry, flaky scalp. Others repair structural damage at the barrier level. And then there are products engineered to wake up sluggish follicles and encourage new visible growth.

The challenge is that many serums blend these goals together in their marketing, making it hard to tell what you're actually paying for. This comparison breaks down three popular options: Trybello Hair Helper Spray, Ouai Scalp Serum, and Olaplex No.0.5 Scalp Longevity Treatment, so you can see how each one works, expected results, and costs.

“Doctor-Approved Natural Spray Rapidly Boosts Growth & Thickness.
Why 100,000+ Women Are Switching to Trybello!"

Join over 100,000 happy customers who've transformed their hair with our doctor-formulated spray in just 12 weeks, rated 4.8/5 by 40,000+ real users.

Proven Natural Ingredients

• • Caffeine Extract – Blocks DHT and boosts blood flow to follicles
• • Biotin – Direct scalp absorption, no pills needed
• • Castor Oil – Soothes inflammation and locks in moisture
• • Rice Water Extract – Strengthens hair and reduces shedding

120-Day Growth Guarantee: No results? 100% money back, no questions asked.

Get Trybello Hair Helper Spray →

Trybello Hair Helper Spray

Trybello Hair Helper Spray uses a botanical blend of biotin, caffeine, and castor oil to support thicker, fuller hair.

Our Trybello Hair Helper Spray was built with one goal in mind: to give your hair the direct follicle-level support it needs to look and feel visibly thicker, fuller, and healthier. We didn't set out to create another generic scalp moisturizer. Instead, we wanted a product that delivers noticeable changes you can actually see in the mirror. Every ingredient we use reflects our commitment to premium, botanical-first formulation.

Key Ingredients

We selected each ingredient in our Trybello formula for its proven role in scalp and hair wellness, creating a botanical blend that works on multiple levels simultaneously.

• Biotin – Applied directly to the scalp for maximum absorption, biotin strengthens hair at the follicle level, helping to reduce breakage and support healthier, more resilient strands over time.
• Caffeine – A natural DHT blocker that also promotes healthy blood circulation to the scalp, caffeine helps energize follicles and extend the active growth phase of the hair cycle.
• Castor Oil – Rich in essential fatty acids, castor oil deeply moisturizes the scalp and helps calm irritation, creating a nourished environment where hair can thrive.
• Rice Water Extract – Long valued for its strand-strengthening properties, rice water extract helps fortify hair from root to tip while reducing everyday shedding.
• Ginger Extract & Angelica Root – These traditional botanicals round out the formula with antioxidant-rich scalp nourishment that supports overall hair vitality.

How It Works

Using Trybello Hair Helper Spray fits seamlessly into any existing routine. Apply 1–2 pumps directly to the scalp in areas where thinning or shedding is most noticeable. Work it in with a gentle massage for a minute or two to help the formula absorb.

From there, you have options: leave it on for at least 30 minutes before washing, let it work overnight, or simply leave it in and go about your day. For the best results, we recommend using it once or twice daily.

Timeline to Results

Based on feedback from our growing community of over 100,000 customers, the typical journey looks like this: within the first 4 weeks, many users notice less hair collecting on their brush and in the shower drain, a sign that shedding is slowing down.

Around the 8-week mark, fine new growth often becomes visible, particularly around the hairline and temples. By weeks 12 to 16, the cumulative effect becomes hard to miss. Users commonly describe hair that is noticeably thicker and fuller, with improved overall vitality.

Price

Trybello Hair Helper Spray is $49.97 (Currently on sale at $39.97) for a 30-day supply. We also offer subscription discounts for those who want to maintain their results with regular deliveries.

Ouai Scalp Serum

Ouai Scalp Serum combines adaptogens, hyaluronic acid, and peptides in a formula designed to hydrate the scalp and support fuller-looking hair. (Image source: Ouai)

Ouai positions its Scalp Serum as a bridge between skincare and hair care. Founded by celebrity hairstylist Jen Atkin, the brand applies the same principles you'd use for a facial serum: hydration, barrier support, and consistent daily application to the scalp. The product is marketed as suitable for all hair types and textures, including oily hair, and is gender inclusive.

Key Ingredients

Ouai's formula is built around adaptogens like Arctic root, Siberian ginseng, and chaga mushroom, which work to promote hydration and a healthy scalp barrier. Hyaluronic acid draws and retains moisture at the scalp level, while acetyl tetrapeptide-3 (a peptide complex) supports the appearance of fuller, thicker, and healthier hair.

How It Works

Ouai's serum is dispensed through a glass pipette for precise, controlled application. The brand recommends applying daily for best results. It's a leave-in formula with no rinsing required, and can be used morning or night on either wet or dry hair.

Timeline to Results

Ouai recommends consistent daily use for at least 90 days to see meaningful changes. In a 16-week expert-grading study of 32 subjects, the brand reported that all participants showed improvement in the appearance of fuller, thicker hair.

Price

The Ouai Scalp Serum retails at $54 for 2 fl oz (60ml). For those ready to commit long-term, Ouai offers a Drop Ouai Every Day Kit, a 90-day supply (3 bottles) at $105 (regularly $162).

Olaplex No.0.5 Scalp Longevity Treatment

Olaplex No.0.5 focuses on strengthening the scalp barrier and protecting against accelerated scalp aging for healthier-looking hair over time. (Image source: Olaplex)

Olaplex is known for its patented bond-building technology, and the No.0.5 Scalp Longevity Treatment is the brand's entry into dedicated scalp care. Rather than targeting hair growth directly, this product focuses on scalp barrier health and anti-aging, creating the foundation for healthier hair over time.

Key Ingredients

The formula is built around Olaplex's proprietary Bond Building Technology, which re-links disulfide bonds within keratin to strengthen the scalp barrier.

This is complemented by an antioxidant-rich blend of lavender and Tazman pepper extracts to protect against free radical damage, along with a Biome Pro-Balancing Blend that helps maintain a healthy scalp microbiome. Ceramides, rice bran oil, and hyaluronic acid round out the formula for added hydration.

How It Works

Part hair with the needle-nose applicator and squeeze gently to apply directly to the scalp. Olaplex recommends 3–4 sections on the crown and back of the head, massaging thoroughly for proper absorption. For best results, use three times a week, though it's gentle enough for daily use.

Timeline to Results

Olaplex states that users can expect a soothed, more hydrated scalp after the first use, with visibly healthier, softer hair appearing after 4 weeks of consistent use. It's worth noting that these results relate to scalp health and hair softness rather than hair density or regrowth.

Price

Olaplex No.0.5 Scalp Longevity Treatment retails for $44. There is no money-back guarantee for growth.

Ouai vs Olaplex vs Trybello Hair Growth Serum: Comparison Table

Why Trybello Hair Helper Spray Stands Out

Where Ouai focuses on creating a hydrated scalp environment, and Olaplex works to slow down scalp aging, our formula goes a step further by actively delivering follicle-stimulating botanicals where they matter most. Biotin, caffeine, and castor oil aren't just trending ingredients. They're backed by research and chosen specifically for their roles in supporting healthier, stronger hair from the root.

And then there's the guarantee. Our 120-Day Complete Growth Guarantee reflects how much we believe in this product's potential. We're a US-based company headquartered in Miami, FL, and every bottle of our Trybello Hair Helper Spray is made with 100% botanical ingredients and is vegan, cruelty-free, and free of hormones, silicones, parabens, and synthetic chemicals.

Our product range extends beyond the spray to include shampoos, conditioners, and lash and brow serums for a complete hair wellness routine.

TRY OUR HAIR HELPER SPRAY NOW →

Frequently Asked Questions (FAQs)