STRONGEST Growth Serum for Black Women
★★★★★
Rated 4.3 (7,800+) Reviews
Rennora Extra Strength Hair Growth Serum
Our most potent formula yet. Engineered for the most severe thinning, advanced alopecia, and the cases where the original formula needs more firepower.
2X higher concentration of follicle-activating actives
Built for advanced thinning, traction alopecia & long-stagnant growth
100% drug-free, plant-based. Just stronger.
CHOOSE YOUR PACK
1 Bottle
1 Month Supply
$27.99
$54.99
2 Bottles
2 Month Supply
$49.99
$109.99
$24.99 per bottle
3 Bottles
3 Month Supply
$69.99
$164.99
$23.33 per bottle
4 Bottles
4 Month Supply
$79.99
$219.96
$19.99 per bottle
ONE-TIME PURCHASE
Save 15% With Automatic Refills
Online portal for easy, cancel, or pause. Refills every 28 days.
120-day Moneyback Guarantee
WHAT MAKES IT EXTRA STRENGTH?
We doubled the concentration of every active in our original formula and added 14 additional botanicals: stronger DHT-blockers (saw palmetto extract at 2x potency), deeper-penetrating circulatory compounds, and clinical-grade follicle peptide complexes. Same gentle base. More of every working ingredient.
HOW IS THIS DIFFERENT FROM THE REGULAR SERUM?
The Regular Serum is designed for everyday thinning, edge maintenance, and prevention. Extra Strength is engineered for severe cases - advanced traction alopecia, postpartum loss that won't recover, hormone-driven thinning, hair that has been stagnant for years, or anyone who used the original and wants stronger results.
HOW TO USE EXTRA STRENGTH
Apply 5-7 drops directly to scalp on affected areas (edges, crown, bald spots, thinning areas). Massage gently for 2-3 minutes to stimulate circulation. Use once daily for severe thinning, 4-5 times weekly for moderate cases. No rinsing required. Consistency is key - use for the full 90-120 days.
INGREDIENTS
Soybean, Castor, Grape Seed, Olive, Black Seed, Peppermint, Black Tea, Lemongrass, Chili, Argan, Tea Tree, Amla, Bhringraj, Stinging Nettle, Mustard, Basil, Se… Soybean, Castor, Grape Seed, Olive, Black Seed, Peppermint, Black Tea, Lemongrass, Chili, Argan, Tea Tree, Amla, Bhringraj, Stinging Nettle, Mustard, Basil, Sesame, Rosemary, Sage, Thyme, Aloe, Garlic, Onion, Pygeum, Biotin, Ginkgo Biloba, Neem, Aritha, Calendula, Chamomile, Dandelion, Saw Palmetto, Ginseng, Fenugreek, Ginger, Gotu Kola, Hibiscus, Lavender, Horsetail, Magnolia Champaca, Clove, Khas Khas, Clary Sage, Dampuri, Pulankilangu, Chandramoolika, Curry Leaf, Ranawara, Valampuri.
SHIPPING & RETURNS
Free shipping on all orders over $60. Orders ship from our Atlanta facility within 48 hours. Domestic delivery in 3-5 business days. Not satisfied? We offer a full 120-day money-back guarantee.
"Thanking GOD so far for this amazing product that is bringing my hair in slowly. I've tried everything! I've been dealing with hair loss for the past 6 years from perm damage that caused bad hair loss. My hair is coming back and it's amazing!"
Belinda G.
FIND YOUR FORMULA
which rennora is right for your hair?
REGULAR SERUM
Start with Regular if you have...
No hair loss and just want to maintain healthy hair and prevent future loss
Slow growth or stagnation - but no visible scalp yet
EXTRA STRENGTH
Step up to Extra Strength if you have...
Visible bald spots, advanced traction alopecia, or exposed scalp
Tried the regular formula and want stronger, faster results
Years of stagnant growth - hair that hasn't changed in 2+ years
Hair loss from medication, chemo, hormones, or major illness
Severe postpartum or menopause-driven thinning function.
Already tried minoxidil, biotin, or other oils with no results
WEEK BY WEEK
what you'll see, when you'll see it.
Real timelines from women using the Extra Strength formula. No miracle-day-three promises - just the honest map of what changes, in what order, on the way to month four.
DAY 1 → 10
01
Scalp Stops Hurting
The doubled anti-inflammatory load cuts scalp irritation and tenderness faster than the regular formula - usually within the first week.
Day 15 → 30
02
Baby Hairs Along the Edges
Fine baby hairs along thinning edges and exposed crown - up to a week earlier than the regular formula. Your follicles are responding.
Day 31 → 60
03
Crown Starts Closing Up
Bald spots and stubborn thinning patches that have been dormant for years start filling in. People will start asking what changed.
Day 61 → 120
04
The Reset
Hair you didn't think would come back, comes back. Edges restored. Crown filled. Density returned to a place you can style and show off.
whatever caused it, we can wake it back up.
You don't need a diagnosis to know your hair is thinning. Rennora Extra Strength Hair Growth Serum is formulated to work across every common cause of hair loss in Black women - so you can stop researching and start growing.
ADVANCED HAIR LOSS & SEVERE EDGES LOSS
✓ Targets follicles damaged by years of braids, weaves, and tension
✓ Penetrates through fibrotic scarring that blocks regular formulas
✓ Restores hairline density in cases doctors said were permanent
✓ Works on edges that have been thin for years
LONG-STAGNANT CROWN & BALD SPOTS
✓ Wakes follicles that have been dormant for months or years
✓ Formula is more potent tan regular strength
✓ Fills in bald spots from all types of hair loss
✓ Rebuilds density in patches that regular treatments couldn't touch
HORMONAL & MEDICATION-DRIVEN HAIR LOSS
✓ Supports regrowth after chemo, surgery, or major illness
✓ Counteracts hair loss from GLP-1s, thyroid meds, antidepressants
✓ 2X DHT-blocking power for menopause-driven thinning
AGE RELATED DENSITY LOSS AFTER 40
✓ Reverses the gradual thinning that accelerates after 40
✓ Targets follicles weakened by decades of styling, color, and chemical processing
✓ Effective when minoxidil caused irritation or gave no results
Real Sisters · Real Results
their growth. their stories.
INSIDE THE BOTTLE
four jobs. one formula.
Every ingredient in the bottle does one of four jobs. Here's exactly which plants are doing which work.
JOB 01
Calm The Scalp
● Calendula
● Tea Tree
● Chamomile
● Neem
● Lavender
Calms the chronic inflammation that's been suffocating long-dormant follicles
JOB 02
Feed the follicle
● Rosemary Oil
● Peppermint
● Capsicum (Chili)
● Ginkgo Biloba
● Black Seed
Drives blood flow to follicles that have been starving for years.
JOB 03
Stop the shrinking
● Saw Palmetto
● Onion Seed
● Garlic
● Pygeum
● Stinging Nettle
● Fenugreek
DHT is the hormone that shrinks your follicles. These shut it down without drugs.
JOB 04
Wake the dormant
● Bhringraj
● Hibiscus
● Amla
● Gotu Kola
● Biotin
Rare Ayurvedic herbs that signal dormant follicles to restart their growth cycle.
MAXIMUM GROWTH ROUTINE
stronger formula. same routine.
Three minutes, daily, for the full 120-day cycle.
01
Apply directly to scalp
Use the precision dropper to place a few drops directly on your problem areas - edges, crown, thinning spots, or anywhere the scalp is visible.
Works between braids and under weaves
02
Massage for 2-3 minutes
Use your fingertips in small circular motions. This activates blood flow and helps the 38 plant compounds penetrate down to the follicle.
No rinse. No mess. No residue.
03
Repeat daily for 120 days
Morning or night, whichever fits your routine. Consistency is what wakes dormant follicles. Skipping days resets the clock - so make it a habit.
One bottle lasts ~30 days
The most common mistake: Women quit at day 30 because they don't see "miracle" results overnight. Your follicles need the full 90-120 day cycle to wake up, repair, and grow new strands. That's why we built the guarantee around 120 days - it gives the biology time to work.
HONEST COMPARISON
if your hair loss is severe, you need the proper tool.
Targets the inflammation causing dormancy
Active ingredients
Drug-free, plant-based
Ships in 48 hours from Atlanta
120-day money-back guarantee
Black-owned, independently operated
EXTRA STRENGTH
✓ Yes
49
✓ Yes
✓ Yes
✓ Yes
✓ Yes
Other products
✗ Only moisturizes
1 - 5
Often relies on chemicals
2 - 8 weeks common
Don't believe in their product
Often acquired by big companies and watered down
try every drop. every day. for 120 days.
If our most potent formula doesn't deliver visible, real growth on hair you thought was gone for good, email us and we send your money back.
— Tonya Astor
Founder · Rennora Beauty · Atlanta, GA
Questions Answered
the most common questions before buying.
What if I've tried everything and nothing has worked?
Most of our customers tell us they had tried everything before Rennora - I get it. The reason those failed is they only moisturized the strand or they weren't made to solve the four causes of black women's hair loss. Your follicles are still alive - they're just inflamed and dormant. Rennora is the only formula targeting the inflammation at the root. And if it doesn't work for you, the 120-day guarantee means you don't lose a dollar trying.
Do I need Extra Strength, or is the Regular serum enough?
If your scalp is visible through the hair, if you have actual bald patches, if you've been dealing with this for 18+ months without improvement, or if you've tried other products without results - go straight to Extra Strength. If you're maintaining or have mild thinning, the regular formula is the right starting point. Most women come to Extra Strength after trying the regular and wanting stronger results, which is exactly why we built it.
Will Extra Strength irritate my scalp because it's stronger?
The actives are concentrated - but the base is the same gentle, plant-based, drug-free oil. Most women tolerate it the same as the original. If you have a known sensitive scalp, do a patch test on day one, and start every-other-day for the first week. The formula is sulfate-free, paraben-free, fragrance-free, and safe for color-treated and chemically processed hair.
How fast will I see results with Extra Strength?
Most women report early signs - reduced shedding, calmer scalp, fine baby hairs - within the first 3-6 weeks. The deeper transformation (filled-in edges, regrown crown, restored bald spots) shows up between weeks 6-16. Hair growth is biology, not magic. Severe cases need the full 120 days to fully turn around.
Can I use it with the regular Rennora serum or other products?
Don't layer Extra Strength with the Regular - you'd be doubling up unnecessarily. You can absolutely use it alongside your normal shampoo, conditioner, leave-ins, and styling products. Apply Extra Strength to dry or damp scalp, then style as usual.
Is this a subscription? Will I be auto-charged?
We don't enroll you in anything you didn't ask for. There are no hidden charges, no auto-renewals.
Is it safe to use with braids, weaves, or color-treated hair?
Yes. The serum is designed to be applied directly to the scalp - between braids, under weaves, or on natural hair. It's drug-free, sulfate-free, paraben-free, and gentle enough for daily use on color-treated and chemically processed hair.
How fast does it ship?
We ship from our Atlanta facility within 48 hours of your order, often same day. Tracking is emailed the moment your package leaves the warehouse. Most US orders arrive in 3 to 5 business days.
How do I get my money back if it doesn't work?
Email support@rennorabeauty.com within 120 days of receiving your order. You don't need to return anything. We refund the full purchase price to the same card you used. Real refunds, real fast. We're a small Atlanta team, not a faceless conglomerate.
Your Hair Is Waiting
wake your follicles up.
300,000+ women have made the choice. The 120-day guarantee means the risk is on us, not you.
Free shipping from Atlanta · 120-day money-back