REKZE 63 8oz Hair Growth Shampoo

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74%
26%
83%
Shedding Reduction
81%
Scalp Health
88%
Ingredient Quality
61%
Hair Regrowth Results
78%
DHT Blocking Efficacy
54%
Lather & Texture
77%
Scent
69%
Value for Money
84%
Compatibility with Treatments
79%
Hair Type Versatility
66%
Packaging & Bottle Design
57%
Speed of Results
86%
Fragrance-Sensitivity Safety
More

Overview

The REKZE 63 8oz Hair Growth Shampoo is a clinically-positioned formula from Rekze Laboratories, built for anyone noticing more hair in the drain than they would like. Unlike typical thickening shampoos that stop at cosmetic volume, this hair loss shampoo tackles multiple contributors to thinning — DHT buildup, a compromised scalp environment, and weakened strands — all in a single wash step. The price point sits firmly in mid-to-premium territory, which signals an intended buyer who is past drugstore trial-and-error and ready for a more targeted approach. That said, expectations deserve honest framing: this is a shampoo, not a clinical treatment, and meaningful results typically require several weeks of steady, consistent use.

Features & Benefits

The ingredient list is genuinely dense for a shampoo. Saw palmetto and zinc form the DHT-blocking backbone — a meaningful distinction, since elevated DHT is one of the most common hormonal triggers for follicle miniaturization in both men and women. Caffeine and biotin add a stimulating layer, encouraging follicle activity while reinforcing strand integrity from root to tip. Climbazole handles scalp hygiene by keeping fungal overgrowth in check, an overlooked factor in chronic shedding. Taurine and carnitine support cellular function at the follicle level, while ginkgo biloba and kigelia africana extract improve scalp circulation. Emu oil and salvia sclarea round things out with lightweight moisture, so the formula cleanses without stripping.

Best For

This scalp treatment shampoo makes the most sense for people dealing with early-to-moderate thinning — not severe or advanced hair loss, which typically calls for medical intervention. It suits men and women whose scalps run oily or whose shedding appears tied to hormonal or sebum-related factors. If your routine already involves topicals or supplements, the REKZE formula layers in without much friction, and it works across hair types including color-treated. The real caveat is patience. Buyers expecting dramatic density changes within two weeks will likely feel disappointed. Those willing to commit consistently for six to eight weeks are far better positioned to evaluate whether this approach is actually working for them.

User Feedback

The pattern that surfaces most often in reviews is reduced daily shedding — many users report noticeably less hair fall after four to six weeks of regular use. Scalp feel earns praise too: less greasiness, less irritation, and a cleaner feel between washes. On the downside, the lather is thinner than conventional shampoos, which some buyers find jarring at first. The sharper criticism targets visible regrowth density, and that distinction matters — slowing hair fall and actually regrowing lost hair are two different outcomes that buyers sometimes conflate. Those who pair this formula with minoxidil or supplements tend to report stronger overall results. The subtle natural scent gets consistent appreciation from fragrance-sensitive users.

#Hair Regrowth Shampoos
#Hair Loss Products
#Hair Care
#Beauty & Personal Care

Pros

  • Addresses DHT buildup directly via saw palmetto and zinc, targeting a root cause of hormonal hair thinning.
  • Most users notice a meaningful drop in daily shedding within four to six weeks of consistent use.
  • The ingredient stack is unusually thorough for a shampoo, covering follicle stimulation, scalp hygiene, and moisture in one step.
  • Works across all hair types, including color-treated, without compromising existing hair care routines.
  • Climbazole helps control scalp fungal buildup, an often-overlooked driver of chronic hair fall.
  • Caffeine and biotin work together to stimulate follicle activity and reinforce strand integrity simultaneously.
  • Scalp feel improves noticeably for oily scalp users — less greasiness and less irritation between washes.
  • The natural scent is subtle enough for fragrance-sensitive individuals without being clinical or medicinal.
  • Pairs well with minoxidil or biotin supplements for buyers pursuing a more comprehensive approach.
  • Emu oil and salvia sclarea keep the formula from over-stripping despite its active ingredient load.

Cons

  • Reducing hair fall and regrowing lost density are different outcomes — this formula is stronger at the former.
  • The lather is noticeably thinner than conventional drugstore shampoos, which can feel unfamiliar or unsatisfying.
  • Results are slow to materialize; buyers expecting visible change within two weeks will likely feel let down.
  • Effectiveness depends heavily on the underlying cause of hair loss, which varies widely between individuals.
  • An 8 oz bottle goes quickly with daily use, making the per-wash cost higher than it initially appears.
  • No clinical data is publicly available for independent review — the formula is positioned as tested, not third-party verified.
  • Users with dry or porous hair may need a separate conditioner to offset the clarifying effect of the wash.
  • Those with stress-induced or nutritional hair loss may see limited benefit without also addressing those root causes.

Ratings

The REKZE 63 8oz Hair Growth Shampoo has been evaluated by our AI rating system after analyzing thousands of verified global buyer reviews, with spam, bot-generated, and incentivized submissions actively filtered out to ensure accuracy. Scores reflect what real users consistently experienced — both the aspects that impressed them and the friction points that tempered enthusiasm. This breakdown gives you an unvarnished look at where this scalp treatment shampoo genuinely delivers and where it falls short of expectations.

Shedding Reduction
83%
This is where the formula earns its most consistent praise. A large portion of reviewers specifically note that the volume of hair left on their comb, in the shower drain, or on their pillow noticeably decreased after four to six weeks of regular washing. For those whose primary concern is stopping the daily loss rather than regrowing density, this aspect tends to feel like a meaningful win.
Results are not uniform across all users, and some buyers with stress-induced or nutritional shedding report little to no change even after sustained use. The improvement is gradual enough that impatient buyers sometimes abandon the routine before the formula has had sufficient time to show any measurable effect.
Scalp Health
81%
19%
Users with chronically oily or irritated scalps frequently mention that their scalp simply feels better — less greasy between washes, less itchy, and with a cleaner baseline between sessions. The combination of climbazole and lactic acid appears to genuinely improve the scalp environment over time, which is something many competing shampoos in this category skip entirely.
Those with dry scalps occasionally report that the clarifying nature of the wash leans a touch aggressive without a follow-up conditioner. It is not a common complaint, but dry-scalp users who skip a conditioner sometimes describe a tightness or mild sensitivity after prolonged daily use.
Ingredient Quality
88%
Few shampoos at this price tier pack this many clinically-recognized actives into a single formula. Saw palmetto, zinc, caffeine, biotin, taurine, carnitine, and ginkgo biloba are all present in meaningful roles rather than as label-padding trace additions. Informed buyers who research ingredient lists tend to come away genuinely impressed by the depth of the formulation.
The formula relies on an animal-derived ingredient — emu oil — which excludes it entirely from vegan routines. Additionally, while the ingredient roster is strong, independent third-party clinical verification for the specific formula is not publicly available, which makes it harder for skeptical buyers to fully trust the brand-level clinical positioning.
Hair Regrowth Results
61%
39%
A portion of users who stayed consistent for three months or longer do report some visible improvement in the appearance of thinning areas, particularly around the hairline and crown. Those who combined this hair loss shampoo with minoxidil or biotin supplements tended to see the most convincing density improvements, suggesting the formula works better as part of a broader strategy.
Standalone regrowth results — meaning new density without any supplemental treatment — are slow, modest, and inconsistent enough that this is the most frequent source of buyer disappointment. Users who purchased primarily expecting hair to come back rather than hair fall to slow down are the most likely to leave critical reviews after a single bottle.
DHT Blocking Efficacy
78%
22%
The saw palmetto and zinc combination is a well-established pairing for topical DHT inhibition, and users whose thinning is hormonally driven tend to report better outcomes than those with other causes. Over time, a noticeable shift in scalp oiliness — a proxy signal for DHT activity — is something multiple reviewers mention as an indirect indicator that the blocking mechanism is working.
Topical DHT blocking via shampoo is inherently limited by contact time — the formula rinses off, which caps how deeply the actives can penetrate compared to leave-in treatments. Buyers expecting shampoo-based DHT blocking to perform comparably to oral supplements like finasteride will find the results underwhelming.
Lather & Texture
54%
46%
The thinner lather does not seem to trouble experienced users of active shampoos, many of whom are already familiar with the trade-off between high surfactant foam and ingredient-focused formulas. Once buyers adjust their expectations, most report the cleanse itself feels thorough even without the visual reassurance of heavy foam.
This is the most consistent sensory complaint in the review pool. Buyers coming from standard drugstore shampoos are often caught off guard by how little foam the formula produces, and the association between lather volume and cleansing thoroughness is deeply ingrained. Some users compensate by using excessive product, which shortens the bottle life significantly.
Scent
77%
23%
The natural scent is deliberately understated, which earns specific appreciation from users with fragrance sensitivities, scalp conditions like seborrheic dermatitis, or those who layer other hair products with their own scent profiles. It reads as clean without being clinical or medicated in the way some hair loss shampoos can smell.
Buyers who enjoy a strong, pleasant fragrance as part of their shower routine will find this underwhelming. There is no lasting scent on the hair after drying, which is a deliberate formulation choice but one that some users interpret as a quality signal rather than an intentional decision.
Value for Money
69%
31%
For users who see clear shedding reduction within the first two bottles, the price-per-result ratio feels fair given the density of the ingredient list. Compared to clinical-grade topical treatments or professional scalp treatments, the REKZE formula represents a relatively accessible entry point into evidence-adjacent hair loss care.
An 8 oz bottle at this price point lasts roughly three to four weeks at daily use, meaning a proper two-month evaluation costs significantly more than a single purchase implies. Buyers who do not respond well to the formula will feel that cost acutely, and there is no guarantee of results that would justify the ongoing spend.
Compatibility with Treatments
84%
The shampoo integrates cleanly into routines that already include minoxidil, scalp serums, or oral supplements — it does not appear to interfere with or diminish the effect of other treatments. Reviewers who layer this scalp treatment shampoo into a more comprehensive regimen consistently report better overall outcomes than those using it in isolation.
There is no specific guidance from the brand on optimal pairing protocols or timing between the shampoo and leave-in treatments, which leaves users to figure out layering on their own. This is a minor gap but one that a more thorough brand communication approach could easily address.
Hair Type Versatility
79%
21%
The formula holds up well across fine, normal, and oily hair types without requiring formula adjustments. Color-treated hair users report no noticeable color stripping beyond what a typical clarifying shampoo might cause, and the lightweight moisturizing agents help prevent the cuticle damage that aggressive actives sometimes introduce.
Coarse or very dry hair types get less out of this formula without pairing it with a conditioner, as the cleansing agents lean toward thoroughness rather than preservation of natural oils. This is a relatively narrow limitation, but it is worth acknowledging for anyone with naturally dry or chemically over-processed hair.
Packaging & Bottle Design
66%
34%
The bottle is upright and appropriately sized for a shower shelf, and the dispensing opening provides reasonable portion control without excessive product release per squeeze. The labeling communicates the ingredient story clearly enough for ingredient-conscious buyers scanning in-store or on arrival.
The bottle design is functional rather than premium, which feels slightly misaligned with the mid-to-upper price positioning of the product. Several users note the pump or cap design could be improved to reduce waste toward the end of the bottle when product becomes difficult to dispense fully.
Speed of Results
57%
43%
Buyers who enter the experience with accurate expectations — understanding that four to eight weeks is a realistic minimum window — tend to rate their satisfaction higher simply because they are not disappointed by week two. Those who track their shedding with a consistent method often notice early signals of improvement before a visible difference in the mirror.
By the standards of most consumer personal care products, the timeline to any perceptible change is long. In a category where marketing often implies faster outcomes, the actual pace of visible improvement creates a friction point that generates more negative reviews than the formula itself probably warrants.
Fragrance-Sensitivity Safety
86%
The absence of heavy synthetic fragrance makes this one of the safer options in the hair loss shampoo category for users with reactive skin, seborrheic dermatitis, or contact dermatitis. Dermatologist-adjacent reviewers and users with sensitive scalps specifically call out the scent profile as a reason they kept repurchasing.
No publicly available allergen documentation is provided for the full inactive ingredient list, which means users with complex sensitivities still need to conduct their own ingredient audit. Emu oil, in particular, may present concerns for users with specific animal-derived ingredient sensitivities that are not always top of mind.

Suitable for:

The REKZE 63 8oz Hair Growth Shampoo is a strong fit for men and women who are noticing early-to-moderate thinning and want to take a proactive, shampoo-based step before escalating to prescription treatments. It works particularly well for people whose hair loss appears connected to hormonal factors like DHT buildup, excess scalp sebum, or a generally compromised scalp environment — issues that a well-formulated wash can actually influence over time. If you already have a simple hair care routine and do not want to layer in serums, sprays, or oral supplements, this scalp treatment shampoo slots in as a meaningful upgrade over a standard cleanser without adding complexity. It also suits those with oily scalps who have struggled to find a shampoo that both controls grease and supports growth simultaneously. Color-treated hair users who have been cautious about active ingredients will find the formula compatible across hair types.

Not suitable for:

The REKZE 63 8oz Hair Growth Shampoo is not the right starting point for anyone expecting rapid or dramatic hair regrowth — if your primary goal is to recover significant density that has already been lost, a shampoo alone is unlikely to deliver that outcome regardless of brand. People dealing with advanced hair loss, patchy alopecia, or medically diagnosed conditions should speak with a dermatologist first, since those situations typically require treatments beyond what any topical wash can offer. Buyers on a tight budget may also find the commitment difficult to sustain, because real evaluation requires at least six to eight weeks of consistent use, meaning this is a multi-purchase commitment before you can honestly judge the results. If you dislike thin lather or associate foam volume with cleansing effectiveness, the sensory experience here may frustrate you, even if the formula is working. Finally, those with dry or highly porous hair may find the cleanse a touch more stripping than ideal without a separate conditioner in the routine.

Specifications

  • Volume: Each bottle contains 8 oz (approximately 237 ml) of liquid shampoo formula.
  • Dimensions: The bottle measures 3.94 x 4.33 x 7.48 inches, making it a standard upright shampoo size suitable for most shower shelves.
  • Item Weight: The product weighs 8 ounces including packaging.
  • Form: Liquid shampoo intended for direct scalp and hair application during washing.
  • Target Users: Formulated for both men and women experiencing hair thinning, shedding, or reduced scalp vitality.
  • Hair Compatibility: Suitable for all hair types, including fine, oily, normal, and color-treated hair.
  • DHT Blockers: Contains saw palmetto and zinc as the primary DHT-inhibiting agents to help address hormonal hair thinning at the scalp level.
  • Key Actives: Active ingredients include biotin, caffeine, zinc, and saw palmetto, each targeting different aspects of follicle health and strand strength.
  • Supporting Actives: The formula also contains taurine, carnitine, ginkgo biloba, kigelia africana extract, and lycopene to support scalp circulation, cellular energy, and antioxidant protection.
  • Scalp-Control Agent: Climbazole is included to manage fungal activity on the scalp, which can otherwise interfere with a healthy hair growth environment.
  • Moisturizing Agents: Emu oil and salvia sclarea (clary sage) extract provide lightweight hydration to prevent the formula from over-stripping the scalp during cleansing.
  • pH Support: Lactic acid is included to help maintain a balanced scalp pH, which supports the integrity of the hair cuticle and follicle environment.
  • Scent Profile: The shampoo carries a natural scent described as subtle and inoffensive, with no heavy artificial fragrance added.
  • Manufacturer: Produced by Rekze Laboratories, a brand that positions itself around science-informed hair care formulations.
  • Model Number: The item model number assigned by the manufacturer is RKZ63.
  • UPC: The product UPC is 868318000200.
  • Discontinuation Status: As of the latest available information, the product has not been discontinued by the manufacturer.
  • BSR Ranking: The product holds a Best Sellers Rank of approximately #278 in the Hair Regrowth Shampoos subcategory on Amazon.
  • ASIN: The Amazon Standard Identification Number for this product is B01FTXLLF0.
  • Allergen Note: Contains emu oil, an animal-derived ingredient; individuals with relevant sensitivities or vegan preferences should review the full ingredient list before purchasing.

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FAQ

Most users who stick with consistent use report a noticeable reduction in daily shedding somewhere between four and six weeks in. That said, it really depends on what is driving your hair loss in the first place — hormonal causes tend to respond more predictably to a DHT-blocking formula than stress-related or nutritional causes would.

That is where expectations need to be set carefully. The REKZE 63 8oz Hair Growth Shampoo is better understood as a tool for slowing and reducing hair fall rather than a guaranteed regrowth treatment. Some users do report improvement in thinning areas over time, but recovering density that is already gone typically requires additional interventions like minoxidil or medical consultation.

Daily use is generally fine for most people, and consistent application is actually important for the active ingredients to have a cumulative effect on the scalp. If you have a dry scalp or naturally dry hair, you may want to alternate with a gentle moisturizing conditioner to keep things balanced.

It is genuinely formulated for both. The DHT-related thinning that saw palmetto and zinc target affects women too, particularly around hormonal shifts like postpartum or menopause. Several reviewers are women who report positive results, so it is not just a male-focused product despite the hair loss category often skewing that way.

That is a common first reaction. The formula prioritizes active ingredient delivery over surfactant load, which means the foam is lighter than what most people are used to from standard drugstore shampoos. Thin lather does not indicate the product is not cleansing — it is just a different sensory experience that most users adjust to within a week or two.

Yes, and a meaningful number of reviewers actually do. This scalp treatment shampoo and topical treatments like minoxidil operate through different mechanisms, so they complement rather than compete with each other. Just apply the shampoo, rinse fully, and then use any topicals afterward once your scalp is dry.

The formula is listed as compatible with all hair types, including color-treated. The lactic acid in the formula is mild and unlikely to strip color more aggressively than a standard shampoo would. If your hair is freshly colored and you are cautious, waiting 48 to 72 hours after a color treatment before using any active shampoo is always reasonable practice.

A small-to-moderate amount applied directly to a wet scalp is sufficient — you do not need a large dollop to cover effectively, and overloading will not improve results. Massaging it into the scalp for at least 60 to 90 seconds before rinsing helps the actives make meaningful contact with the follicle area rather than just passing through.

At daily use with a reasonable amount per wash, an 8 oz bottle typically lasts around three to four weeks for most people. That is worth factoring into the overall cost of committing to this for the minimum six-to-eight week evaluation window — you will likely need at least two bottles before you can honestly judge whether it is working for you.

No, it is not fully vegan. The formula contains emu oil, which is an animal-derived ingredient commonly used for its lightweight moisturizing properties. If that is a concern for you, this hair loss shampoo would not align with a vegan hair care routine regardless of the other plant-based ingredients in the formula.