UpNature Organic Castor Oil Lash & Brow Serum (2 oz)
🔥 #57 in Lash & Brow Serums · New Budget-friendly, gentle castor oil conditioning serum.
UpNature Organic Castor Oil Lash & Brow Serum (2 oz)
UpNature 2.3
#57
in Lash & Brow Serums
$7.68 →
As of Jul 13, 2026
AI-estimated. See how we score. How we score Affiliate link — we may earn a commission
01 / Spec
Top features
Active TypeOrganic castor oil (conditioning)
Key ActivesCold-pressed castor oil, natural moisturizers
ForLashes and brows
UpNature Lash Serum is a 100% USDA organic, cold-pressed castor oil formulation marketed for eyelash and eyebrow growth support. It operates as a conditioning serum rather than a peptide-driven or prostaglandin-analog formula, relying on castor oil's traditional reputation for moisturizing and nourishing hair follicles. The product comes in a 2 fl oz glass bottle with a mascara-tube applicator for precise application to lashes and brows. It is cruelty-free, sustainably sourced, and suitable for all skin types. Results are gradual and depend on daily, consistent use; the formula is gentler and prostaglandin-free, making it a lower-risk option for users seeking mild conditioning rather than aggressive growth acceleration. Best suited for those prioritizing organic ingredients and scalp/brow hydration over rapid visible lengthening.
02 / Signals
Why it's hot
Affordable organic castor oil with solid value-for-money and low irritation risk.
- Value for money 89
- Review rating & velocity 56
- Community sentiment 60
- Brand reputation 52
- Search heat 47
- Est. return & defect rate 84
03 / Verdict
Pros & cons
Pros
- 100% USDA organic, cold-pressed castor oil
- Affordable at ~$3.84–$5 per fluid ounce
- Prostaglandin-free and gentle for sensitive eyes
- Multipurpose: eyelashes, eyebrows, scalp, and skin
- Includes convenient mascara-tube applicator
- Cruelty-free and sustainably sourced
Cons
- Castor oil alone slower than peptide or prostaglandin serums
- Results highly variable and require daily consistency
- Limited clinical evidence for lash-specific growth
- No active peptides or biotin blend
- Can feel heavy or oily if over-applied
- Minimal online review volume compared to category leaders
Active TypeOrganic castor oil (conditioning)
Key ActivesCold-pressed castor oil, natural moisturizers
ForLashes and brows
Size2 fl oz (59 mL)
Price Per Month~$7.68–$9.99 (Prime/Standard)
ApplicatorMascara-tube wand
FragranceUnscented
Cruelty Free VeganCruelty-free, vegan
Prostaglandin FreeYes
05 / Your take
How was UpNature Organic Castor Oil Lash & Brow Serum (2 oz)?
Share your own experience to help other shoppers. Takes under a minute.
Thanks for your feedback!
Collected privately to sharpen our research — never published, and it doesn't affect rankings.
05 / Compare
Compare the best alternative
One useful head-to-head in Lash & Brow Serums, with the rows most likely to separate the contenders.
Open full comparison → 
GrandeLASH-MD Lash Enhancing Serum 1mL
Regrowth Efficacy
Gradual softening; mild growth over 12+ weeks Fuller lashes in 6–8 weeks Most regrowth
Cost per Month
$3.84–$5 per fl oz; excellent monthly cost $36/month (~$1.20/day)
Peptide Potency
Castor oil + natural conditioning Multi-peptide + biotin, panthenol, castor oil
06 / Rivals
Compare with
07 / Variations
Other options
08 / Browse
More in Lash & Brow Serums
GrandeLASH-MD Lash Enhancing Serum 1mL
Lash & Brow Serums
#1 of 40
As of Jul 13, 2026 
Grande Cosmetics GrandeBROW Brow Enhancing Serum 3 mL
Lash & Brow Serums
#2 of 40
As of Jul 13, 2026 
GrandeBROW 2-in-1 Tinted Brow Gel + Peptide Serum, Light (0.12 fl oz)
Lash & Brow Serums
#3 of 40
As of Jul 13, 2026 
BABE ORIGINAL Renewing Lash Serum – 3mL Peptide Lash Enhancer
Lash & Brow Serums
#4 of 40
As of Jul 13, 2026 
Babe Lash Original Serum — 1mL Peptide Lash & Brow Conditioner
Lash & Brow Serums
#5 of 40
As of Jul 13, 2026 
Kate Blanc Organic Castor Oil for Hair & Scalp 2oz
Lash & Brow Serums
#6 of 40
As of Jul 13, 2026 09 / Explore
