Grow Back Thicker, Fuller, and Stronger Hair with SRN-5™ Peptide Scalp Serum
For Thinning That Biotin And Oils Couldn't Fix
Five biomimetic peptides, Baicapil™ botanical complex, and Saw Palmetto in one drug-free nightly formula — engineered for thinning triggered by weight loss, hormonal shifts, or aging.
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5 Biomimetic Peptides + Baicapil™ — featuring an active complex clinically shown to reduce the appearance of shedding by up to 60% in ingredient trials
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100% drug-free — zero minoxidil, zero dependency, pet-safe
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One dropper, once nightly, 30 seconds — no grease, no rinse
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90-Day Money Back Guarantee
Try SRN-5™ for up to 90 days. If you don't love it, email us with your order number for a full refund. You keep the bottles. (First order only.)
SRN-5™ Peptide Scalp Serum - 30ml
Customer Reviews
See what our customers are saying about SRN-5™ Peptide Scalp Serum
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Elena R. , 42 Verified Buyer"Two months in. Shedding has noticeably slowed down and my part line looks less exposed. SRN is the only thing that helped me regain my hair back! This is nothing like the minoxidil I used to dread applying. These peptides are amazing."
SRN-5™ Peptide Scalp Serum - 30ml
$69.95
Purchased February 28, 2026
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Amanda R. , 35 Verified Buyer"Pulling my hair into a ponytail started showing bare scalp at my temples, but my doctor insisted my labs were 'fine.' I began dabbing Serrane along my hairline every night, it absorbs immediately without any residue. Within two months, those sparse corners filled in with visible new baby hairs. I can finally wear my hair back again without hiding under a hat :D."
SRN-5™ Peptide Scalp Serum - 30ml
$69.95
Purchased April 24, 2026
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David M. , 34 Verified Buyer"Started this when my hair began thinning three months into my weight loss journey. Wasn't expecting much but by week six my shower drain told a different story. On my second bottle of SRN-5 now."
SRN-5™ Peptide Scalp Serum - 30ml
$69.95
Purchased September 14, 2026
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Tom C. , 39 Verified Buyer"After dropping 25 lbs, my crown started thinning fast. I refused to touch minoxidil because of the dependency and irritation. Serrane takes 20 seconds at night, absorbs like water, and at the 90-day mark my barber actually noticed the new density."
SRN-5™ Peptide Scalp Serum - 30ml
$69.95
Purchased March 14, 2026
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Claire V. , 28 Verified Buyer"Months of severe work burnout triggered shedding so bad I dreaded washing my hair. My doctor shrugged, said my bloodwork was completely normal, and offered zero real help. Serrane stopped the shedding in under six weeks—it absorbs in twenty seconds without greasiness, and my hairline is finally filling back in."
SRN-5™ Peptide Scalp Serum - 30ml
$69.95
Purchased January 5, 2026
Effortless 3-Step Root Protocol
Part & Expose
Section hair where thinning, shedding, or scalp visibility is most noticeable — typically along the center part, receding temples, or crown. Apply directly to a dry or towel-damp scalp before sleep.
Apply SRN-5™ Complex
Fill one pipette dropper and release drops directly onto the exposed scalp areas. The water-light aqueous formula distributes weightlessly across the root bed without clinging to or flattening hair strands.
Massage & Leave In
Massage gently with your fingertips for 20–30 seconds to assist absorption. Dries completely clear in under 60 seconds with zero grease, zero stickiness, and zero pillow transfer — no rinsing required
Here's How We're Different
See how our product stacks up against the competition.
Clinically Studied Actives
Four targeted components, in the order you'll notice them.
Baicapil™ — the studied complex
Targeted botanical defense against excess shedding.
Scutellaria baicalensis root, soy germ, and wheat germ. Shown in active ingredient trials to reduce visible shedding by up to 60% by shielding roots from localized hormonal stress.
Five biomimetic peptides
Cellular root signaling without drug dependency.
The part of the formula the name comes from. Five bio-identical peptides that signal fuller, anchored-looking roots.
Saw Palmetto & botanical soothers
For scalp comfort — the 'doesn't feel tight by midday' part.
Targeted plant sterols to calm the root bed and clear surface tension. Keeps the scalp balanced and quiet — zero tightness, zero flaking, and zero late-afternoon itch.
The biomimetic base (pH 5.22)
Water-weight, zero grease, zero residue.
Purified water and clean humectants buffered to match your scalp’s acid mantle. Zero alcohol, zero silicones, no heavy oils. Dries invisible in 60 seconds.
The Nightly Ritual Behind Fuller-Looking Roots.
60 seconds before bed. Zero grease. Real customer results.
EXPERIENCE SRN-5™-
BAICAPIL™ COMPLEX
Shedding DefenseBAICAPIL™ COMPLEX
Shedding DefenseClinically shown to reduce visible shedding by up to 60% by shielding vulnerable roots against localized stress.
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5-BIOMIMETIC PEPTIDES
Root Anchorage5-BIOMIMETIC PEPTIDES
Root AnchorageBio-identical signaling peptides engineered to support fuller, anchored-looking roots without drug dependency or initial shedding.
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SAW PALMETTO
Follicular ProtectionSAW PALMETTO
Follicular ProtectionPlant sterols that shield follicles from surface buildup and tension, keeping the scalp balanced, quiet, and calm.
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BIOMIMETIC AQUEOUS BASE
Seamless AbsorptionBIOMIMETIC AQUEOUS BASE
Seamless AbsorptionSkin-identical pH 5.22 aqueous vehicle. Absorbs clear in under 60 seconds with zero oils, stickiness, or pillow residue.
They Felt the Shift. You Will Too.
"I can finally sleep with my cats without worrying."
"I needed serious defense against seasonal shedding, but standard topical minoxidil was completely out of the question because even microscopic residue is fatal to cats. SRN-5 gave me peace of mind. It absorbs instantly like water, leaves zero residue on my silk pillows, and my shower drain stopped clogging after week six."
"My hairline and temples don't look transparent anymore."
"A few months postpartum, my shedding was out of control and heavy rosemary oils just left my fine hair looking limp and greasy. SRN-5 dries completely invisible in 30 seconds before bed. By week eight, the sparse areas around my temples look visibly fuller and my morning brush isn't full of loose hair."
"Stabilized the shedding without a drug dependency."
"Down 38 lbs on a GLP-1 and the sudden diffuse shedding was terrifying. I refused to start a lifetime pharmaceutical routine just to manage a temporary metabolic drop. Two months on SRN-5 and the shed is back to normal baseline. My part line doesn't look exposed under direct overhead lights anymore."
"Doesn't ruin my styling or leave a greasy film."
"Most topical scalp serums make your roots look like you haven't showered in three days. This genuinely absorbs like water. I apply it every night, and by morning there's zero buildup or scalp itch. On my second bottle now and my barber noted the crown feels considerably denser under his comb."
You got questions, we got answers
Find answers to common questions about our products and services.
No. Unlike heavy carrier oils that coat hair strands and leave a sticky film, SRN-5™ is a 100% aqueous, water-weight peptide solution. It absorbs directly into the scalp surface in under 60 seconds, drying completely invisible. Your roots stay clean, weightless, and voluminous — zero residue, zero pillow transfer.
Zero minoxidil, zero synthetic hormones, and zero drug dependencies. Because SRN-5™ utilizes biomimetic signaling peptides and botanical actives rather than synthetic vasodilation, it supports the appearance of fuller, anchored-looking roots without triggering the traumatic 3- to 4-week shedding phase common with pharmaceutical treatments.
Human hair operates on a biological renewal cycle of 60 to 90 days. Most users observe noticeably less shedding in the shower drain and hairbrush by weeks 4 to 6. Visible improvements in density and a tighter-looking part line become pronounced between days 60 and 90. Daily consistency is key.
Yes it is safe. Prescription topical treatments like minoxidil are notoriously toxic to felines and canines, even in microscopic dried residues. SRN-5™ is completely drug-free and pet-safe — meaning zero risk if your pets sleep on your pillows or brush against your hair.
Yes. Sudden caloric deficits, metabolic changes, or intense lifestyle stressors frequently push follicles into premature resting phases (telogen effluvium). SRN-5™ delivers direct peptide nutrition to the scalp environment to help stabilize the appearance of sudden diffuse shedding while your body recalibrates.
No. The rich cognac-amber hue is completely natural, derived from the concentrated botanical extracts in the formula — zero artificial colorants or dyes. Because the solution is aqueous and fully water-soluble, it applies clear on the skin and will not discolor, tint, or alter the tone of bleached, silver, or color-treated hair.
SRN-5™ does not create chemical dependence. If you miss an evening, simply resume your protocol the next night. If you discontinue use entirely, your hair returns to its natural biological baseline over time — without the rapid rebound shedding associated with discontinuing pharmaceutical treatments.
Baicapil™ is a patented, clinically studied botanical complex combining Scutellaria baicalensis root, wheat germ extract, and soybean germ extract. In active ingredient trials, it demonstrated up to a 60% reduction in the appearance of hair shedding by supporting follicle vitality and counteracting environmental scalp stressors.
Yes. SRN-5™ is water-based with zero heavy silicones or pore-clogging carrier oils, making it an ideal companion to scalp stimulation routines. If using a gentle cosmetic roller (0.25mm), apply after your session. If using deeper clinical needles (0.5mm+), allow 12 to 24 hours for the skin barrier to calm before applying the serum.
The wheat and soybean germ derivatives in SRN-5™ are purified cosmetic fractions within the Baicapil™ complex. They are topically applied cosmetic actives, not dietary ingredients. However, if you have diagnosed topical allergies to wheat or soy proteins, we always recommend conducting a 24-hour patch test on your inner forearm before applying to the scalp.
Hair cycles take time to respond. We want you to give SRN-5™ a genuine trial. If you don't love how it feels or haven't seen a difference after consistent use, email support@serranelabs.com within 90 days of delivery. We will refund your purchase price in full. You don't have to pack up bottles or pay for return shipping—you keep the product. This guarantee applies to your first order.
We fulfill and dispatch all orders domestically from Colorado within 1–2 business days. Complimentary Standard Ground shipping delivers in 3–5 business days, while Expedited Priority arrives in 1–3 business days. An automated tracking link will be emailed to you the moment your package is scanned by the carrier.