Cold-pressed castor oil has been a staple in natural beauty rituals for generations. From supporting hair growth and thickening lashes to nourishing the scalp, castor oil is one of the most versatile and effective plant-based oils available.
What Is Castor Oil?
Castor oil is extracted from the seeds of the Ricinus communis plant, native to tropical regions of Africa and Asia. Cold-pressed castor oil — extracted without heat — retains the full spectrum of nutrients and fatty acids that make it so effective for hair and skin care.
Its thick, viscous consistency is a result of its unusually high content of ricinoleic acid, a rare omega-9 fatty acid that makes up approximately 90% of castor oil's composition. This compound is responsible for most of castor oil's hair and scalp benefits.
How Castor Oil Promotes Hair Growth
Castor oil works through several complementary mechanisms to support hair growth:
- Ricinoleic acid and scalp health — Ricinoleic acid has documented anti-inflammatory and antimicrobial properties. It helps reduce scalp inflammation that can impede hair follicle function and contributes to a cleaner, healthier scalp environment.
- Improved circulation — Massaging castor oil into the scalp stimulates blood flow to follicles, delivering nutrients critical to the hair growth cycle.
- Moisture retention — Castor oil is a powerful humectant, helping the hair shaft retain moisture and reducing brittleness and breakage.
- Prostaglandin E2 activity — Ricinoleic acid has been studied for its interaction with prostaglandin E2 receptors in the scalp, which play a role in hair follicle stimulation.
Castor Oil for Lashes and Brows
Castor oil is one of the most popular natural treatments for thinning lashes and brows. Applied nightly with a clean spoolie or cotton swab, it conditions the follicles at the lash and brow line, helping to reduce breakage and support fuller, denser growth over time.
For eyelashes, use only pure, additive-free castor oil and apply carefully to avoid getting it in the eye. Our cold-pressed castor oil is free from additives, making it safe for use on the delicate lash and brow area.
How to Use Castor Oil for Hair
Scalp Treatment
Due to castor oil's thick consistency, mixing it with a lighter carrier oil (like jojoba or sunflower) in a 1:2 ratio makes it easier to work into the scalp. Apply to the scalp, massage for 3–5 minutes, and leave on for at least an hour — or overnight for a deep treatment. Wash out thoroughly.
Hair Mask
Apply castor oil from mid-length to ends on dry or damp hair. Cover with a shower cap for 30–60 minutes. This treatment is especially effective for dry, damaged, or color-treated hair that needs intensive moisture restoration.
Lash and Brow Application
Use a clean spoolie or cotton swab to apply a tiny amount to lashes and brows before bed. Remove in the morning with your usual cleanser. Use consistently for 6–8 weeks to see results.
Which Hair Types Benefit Most?
Castor oil is particularly well-suited for:
- Dry or damaged hair — its deep moisturizing properties restore suppleness and reduce breakage
- Thick or curly hair — can penetrate coarser hair textures effectively
- Thinning hair — supports scalp health and follicle stimulation
- Dry scalp — helps relieve dryness and flaking
Those with fine or oily hair should dilute castor oil well and focus application on the scalp rather than lengths, as its thick texture can weigh fine hair down if overused.
Why Cold-Pressed Matters
Cold-pressed castor oil is produced without heat, which preserves its full nutrient profile — including ricinoleic acid, vitamin E, and omega fatty acids. Heat-extracted or refined castor oil loses many of these beneficial compounds in processing.
Our Plantovika Castor Oil is 100% cold-pressed and free from additives, colorants, or synthetic preservatives. It's available in multiple sizes to suit your routine.
How Long to See Results
- 2–3 weeks: Hair feels more moisturized and manageable. Scalp dryness improves.
- 6–8 weeks: Reduced breakage noticeable. Lashes and brows appear fuller.
- 3–4 months: Improved overall hair density and scalp health with consistent use.
Shop our pure, cold-pressed castor oil for hair, lashes, and brows: