Castor Oil Vs Coconut Oil: Best Natural Oil For Skin

If you have stood in the skincare aisle of a health shop, or scrolled through yet another “one oil to fix everything” post on Pinterest, you have probably wondered whether castor oil or coconut oil actually deserves a place on your shelf.

They get lumped together constantly. Both are natural. Both come in a jar or bottle with a rustic label. Both have devoted fans who swear by them for everything from dry elbows to thinning eyebrows.

But chemically, they are almost opposites. One is thick, sticky and rich in a fatty acid found almost nowhere else in nature. The other is light, fast-absorbing and mostly made of a completely different type of fat that behaves more like a solid than a liquid at room temperature.

Understanding that difference is the whole story here. Once you know what each oil is actually doing on your skin, choosing between them (or using both, for different jobs) becomes much easier.

I’m Patri Hernández, a certified organic skincare formulator and dermocosmetic technician with a background in health coaching. I work with carrier oils like these regularly when formulating natural skincare products, and I pay close attention to how their individual chemistry affects the skin.

This post may contain affiliate links. If you buy through one of them, I may earn a small commission at no extra cost to you. I only recommend products and ingredients I genuinely think are worth considering.

What makes castor oil and coconut oil so different

Both oils are triglycerides, meaning they are made of fatty acids bound to a glycerol backbone. Where they part ways is in which fatty acids dominate.

Castor oil is unusually rich in ricinoleic acid, an unsaturated fatty acid that makes up around 90 percent of its content. This is genuinely rare in the plant world; ricinoleic acid barely appears anywhere else in significant amounts, and it is largely responsible for castor oil’s thick, viscous texture and its slightly humectant, film-forming behaviour on skin.

Here is a detail most people never hear: castor oil is one of the very few vegetable oils that dissolves fully in alcohol. Most plant oils and alcohol simply refuse to mix. Ricinoleic acid’s unusual molecular structure, with an extra hydroxyl group most fatty acids don’t have, is what makes this possible. It is one of the reasons castor oil turns up in so many cosmetic formulations, hairsprays and even some perfumes, well beyond skincare.

Coconut oil, by contrast, is made up mostly of saturated fatty acids, particularly lauric acid. This is what gives it a solid, buttery texture below around 24°C and a texture that melts on contact with warm skin. Saturated fats like this sit differently in the skin’s lipid barrier than the unsaturated fatty acids in castor oil.

One practical consequence of this: coconut oil’s melting point sits right around typical room temperature. This is why a jar of coconut oil can look like a hard white block one day and a clear oil the next, with no change in quality whatsoever. It is simply reacting to the temperature of your bathroom.

That single difference in fatty acid profile explains almost every practical difference between the two oils: texture, absorption speed, comedogenicity, and how each one behaves once it is on your skin.

Something worth knowing: the name “castor oil” has nothing to do with the castor bean plant’s botanical features. It was named as a substitute for castoreum, a musky substance historically taken from beavers (whose genus is Castor) and used in old-world perfumery and medicine. Once castor oil became more available and cheaper, it took over that name entirely.

Ingredient snapshot

• Regular castor oil or Jamaican black castor oil
• Coconut oil, solid at room temperature or coconut oil that stays liquid
• Optional: a few drops of vitamin E oil to help stabilise either oil for longer storage
• A small glass jar if decanting for daily use

Castor oil: what it is genuinely good for

Castor oil is thick, viscous and slow to absorb. On its own, it can feel heavy and slightly tacky, which is exactly why formulators like myself rarely use it at full strength on the face.

A safety fact that surprises a lot of people: the castor bean itself contains ricin, one of the most potent natural toxins known. This sounds alarming, and understandably so, but it is genuinely nothing to worry about in the oil you buy. Ricin is a protein, and the heat used during commercial oil extraction denatures it, meaning it no longer poses a threat in properly processed castor oil. It is a good reminder, though, never to attempt extracting oil from raw castor beans at home.

Where it earns its reputation:

• Humectant-like moisture retention. Ricinoleic acid can help form a light film on the skin’s surface that slows water loss, which is useful for very dry patches, cracked heels, or rough elbows.
• Eyelash and eyebrow conditioning. This is one of castor oil’s most talked-about uses. The evidence here is limited and mostly anecdotal or based on very small studies, but the mechanism is plausible: castor oil can help condition existing hair and reduce breakage along the shaft, which may make lashes and brows appear fuller and shinier over time. It is not shown to grow new hair follicles.
• Anti-inflammatory folk use. Ricinoleic acid has demonstrated some anti-inflammatory activity in laboratory research, which may partly explain its long traditional use for joint discomfort and skin irritation, though this is not the same as clinical proof it treats specific skin conditions.
• Lip and cuticle care. Its thick, film-forming texture makes it genuinely useful for very localised, small-area moisture, which is why you will often find it as the base of natural lip balms.

Where castor oil struggles:

• It is too heavy and tacky for most people to use as a daily facial moisturiser on its own.
• Its thickness can trap heat and sweat under the skin if layered too generously in warm weather.
• Some people find it genuinely difficult to remove from the skin’s surface without a proper cleanser.

Coconut oil: what it is genuinely good for

Coconut oil is a different creature altogether. It has a lower melting point, spreads easily, and gives an immediate feeling of softness, which is exactly why it became such a popular multi-purpose beauty staple.

Here is one that catches people out: coconut oil is roughly 90 percent saturated fat, which is actually a higher proportion than butter. Butter sits at around 60 to 65 percent saturated fat by comparison. That saturation is exactly why coconut oil is so stable and slow to turn rancid, but it is also part of why it behaves so differently on skin than lighter, more unsaturated oils like grapeseed or sunflower.

Where it earns its reputation:

• Body moisturiser for normal to dry skin. For the arms, legs and body generally, where pores are less numerous and less easily blocked, coconut oil can be a genuinely effective emollient.
• Hair conditioning. Research has shown that coconut oil can penetrate the hair shaft more effectively than some other oils, thanks to its molecular structure, which helps reduce protein loss from repeated washing and styling.
• Antimicrobial properties. Lauric acid, the main fatty acid in coconut oil, has documented antimicrobial activity in laboratory studies against certain bacteria and fungi. This does not mean coconut oil is a treatment for skin infections, but it is one reason it has traditionally been used on minor cuts and irritation in some cultures.
• Makeup removal. Its oil-dissolving properties make it a reasonably effective, gentle way to remove makeup, particularly waterproof formulas.

Where coconut oil struggles:

• This is the important one: coconut oil is highly comedogenic. On the standard comedogenic rating scale used in dermatology and cosmetic science, it typically ranks around a 4 out of 5, meaning it has a strong tendency to clog pores.
• It is a poor choice for the face if you are prone to breakouts, blackheads, or textured, congested skin.
• It offers very little in the way of active skin benefits beyond basic emollience; it is mostly occlusive, sitting on the skin’s surface rather than delivering much else.

How they compare on the comedogenic scale

This scale runs from 0 (won’t clog pores at all) to 5 (highly likely to clog pores). It is worth keeping in mind next time you are choosing a facial oil.

Oil	Comedogenic rating	Best used on
Castor oil	1	Lashes, brows, cuticles, small dry patches
Coconut oil	4	Body, hair (not typically the face)
Jojoba oil	2	Face, most skin types
Grapeseed oil	1	Face, oily or acne-prone skin

Notice that castor oil actually rates quite low on this scale, at around 1 out of 5. Its reputation as “too heavy for the face” is really about texture and tackiness, not pore-clogging. Coconut oil’s problem is the opposite: it feels lovely and light going on, but it is the one more likely to sit in the pore and cause congestion.

So which one actually wins?

Neither, really, because they are not doing the same job. Think of it less as a competition and more as choosing the right tool for the task.

• For facial moisturising, particularly on mature or acne-prone skin, both oils have real limitations. Castor oil is too heavy to use alone; coconut oil is too comedogenic. Lighter carrier oils such as jojoba, squalane, or grapeseed tend to be more appropriate choices for the face.
• For lash and brow conditioning, castor oil is the more evidence-supported choice, applied sparingly with a clean spoolie.
• For body moisturising, coconut oil is generally the more pleasant and practical option for those without body acne, thanks to its faster absorption and lighter finish.
• For hair care, coconut oil has the stronger research backing for actually penetrating the hair shaft, while castor oil works more as a surface conditioner and scalp treatment.
• For very dry, cracked areas like heels, elbows or cuticles, castor oil’s thick, film-forming texture can genuinely outperform coconut oil, which tends to absorb too quickly to provide lasting occlusion in these tougher areas.

Common mistakes to avoid

• Using coconut oil as a facial moisturiser if you are acne-prone. This is one of the most common skincare mistakes I see. Its high comedogenic rating makes it a frequent, overlooked cause of ongoing breakouts.
• Applying castor oil undiluted to large areas of the face. Its thickness can feel suffocating and may leave a greasy residue that attracts dust and debris throughout the day.
• Assuming “natural” means “suitable for every skin type.” Both oils are entirely natural, and both can still cause problems for the wrong skin type or the wrong area of the body. Natural is not automatically synonymous with gentle or non-comedogenic.
• Expecting either oil to regrow hair. Neither is scientifically shown to stimulate new hair follicle growth. What limited evidence exists relates to conditioning and reducing breakage of existing hair, not growing new hair.
• Skipping the patch test. Both oils are generally well tolerated, but sensitivities and allergic reactions are always possible with any botanical ingredient.
• Storing coconut oil next to the hob or a sunny windowsill. It doesn’t just melt, it can oxidise faster in warmth and light, shortening its shelf life noticeably compared to a cool, dark cupboard.

Safety considerations

Always patch test any new oil on a small area of skin, such as the inner forearm, and wait 24 to 48 hours before wider use.

• Castor oil, particularly Jamaican black castor oil, can occasionally cause contact dermatitis in sensitive individuals.
• Coconut oil is a tree nut derivative and should be avoided by anyone with a coconut or tree nut allergy.
• Neither oil should be used near the eyes without care; if using castor oil on lashes, apply carefully with a clean applicator to avoid it running into the eye itself.
• If you are pregnant or breastfeeding, topical use of either oil is generally considered low risk, but check with your midwife or doctor if you have any specific concerns, particularly regarding castor oil, which has a separate and unrelated traditional use in labour induction when taken orally.
• Both oils can oxidise over time. Adding a few drops of vitamin E oil can help slow this process and extend shelf life when stored in a cool, dark place.

How often to use them

There is no universal rule here, and it depends entirely on the application.

• Castor oil for lashes or brows: nightly is generally fine for most people, using a very small amount.
• Castor oil for very dry patches: as needed, ideally at night so it has time to absorb without feeling greasy under clothing or makeup.
• Coconut oil for the body: daily use after showering is common practice, while skin is still slightly damp.
• Coconut oil for hair: once or twice a week as a pre-wash treatment tends to work better than daily use, which can lead to buildup.

Frequently asked questions

Can I mix castor oil and coconut oil together?

Yes, and many DIY body butter and hair mask recipes do exactly this, blending coconut oil’s lighter texture with castor oil’s occlusive properties. Just avoid this combination on acne-prone facial skin, since it inherits both oils’ drawbacks in that context.

Is castor oil or coconut oil better for wrinkles?

Neither has strong clinical evidence for reducing wrinkles specifically. Their moisturising properties can temporarily plump the look of fine lines by improving surface hydration, but this is a cosmetic effect rather than a structural change to the skin.

Which oil is better for sensitive skin?

This varies person to person, but as a general rule, castor oil’s occlusive, protective quality can be soothing for compromised or very dry sensitive skin, while coconut oil’s fatty acid profile occasionally triggers reactions in those with fragrance or nut sensitivities. Always patch test first.

Does coconut oil clog pores on everyone?

Not necessarily everyone, but its comedogenic rating means the risk is considerably higher than with non-comedogenic oils. Genetics, skin type, and existing pore congestion all play a role in individual tolerance.

Can I use either oil as a carrier oil for essential oils?

Yes, both work as carrier oils for diluting essential oils, though coconut oil’s faster absorption often makes it the more practical choice for leave-on applications, while castor oil’s thickness suits products meant to sit on the skin’s surface for longer, such as balms.

Bringing it together

Castor oil and coconut oil are both genuinely useful natural oils, but they are not interchangeable, and treating them as such is where most people go wrong.

Castor oil earns its place for targeted, occlusive jobs: lashes, brows, cuticles and stubborn dry patches. Coconut oil earns its place for body moisture and hair conditioning, where its lighter texture and antimicrobial fatty acids can genuinely shine.

The face is where both oils need the most caution, and where lighter, less comedogenic alternatives are usually the smarter choice. Knowing the difference between a heavy, film-forming oil and a comedogenic, fast-melting one is the sort of detail that separates a skincare routine that works from one that quietly causes more breakouts than it solves.

For more on getting the basics of a routine right before adding specialty oils, my simple natural face routine breaks down exactly where oils fit in and where they don’t.

Love, Patri xx