Coconut Oil: Side Effects, Skin and Cholesterol in Detail
The dangers article set the general framework. Here is the detail with numbers: what the cholesterol study exactly shows, and a positive skin trial that nuances the all-comedogenic image of coconut oil.
Our article coconut oil: dangers and precautions already identified this oil's two main limitations: its comedogenic potential in cosmetic use, and its effect on cholesterol in dietary use. This one goes deeper into both mechanisms with precise data from the available studies — and adds an important, often-overlooked nuance: coconut oil has also been the subject of a positive clinical trial on skin.
Cholesterol: what the reference meta-analysis precisely shows
A meta-analysis led by Neelakantan, Seah and van Dam, published in 2020 in the journal Circulation, pooled data from 16 controlled trials comparing coconut oil to other fats (see the study on Google Scholar). The authors report that coconut oil raises LDL cholesterol significantly more than unsaturated vegetable oils (olive, canola, sunflower), while raising it somewhat less than butter. A point often left out of popular summaries: the same meta-analysis also reports a modest rise in HDL cholesterol (the "good" cholesterol) with coconut oil compared with unsaturated oils — without this offsetting the overall unfavorable effect on the lipid profile, the authors explicitly concluding that coconut oil should not be considered a heart-healthy alternative to unsaturated oils.
Dry skin: a positive clinical trial, with nuance
In contrast to the comedone risk on oily skin, a randomized double-blind study by Agero and Verallo-Rowell, published in 2004 in the journal Dermatitis, compared virgin coconut oil to mineral oil as an emollient in people with mild-to-moderate xerosis (dry skin) (see the study on Google Scholar). The authors report a comparable, even slightly greater, improvement in skin hydration with virgin coconut oil compared with mineral oil, a reference dermatological emollient. This positive result doesn't contradict the comedone risk documented elsewhere: it concerns dry skin without an acne-prone tendency, on body areas rather than necessarily the face — two very different contexts from oily skin applied to the face.
How these two mechanisms coexist without contradicting each other
| Skin type | Observed effect | Source |
|---|---|---|
| Dry skin, mild-to-moderate xerosis | Improved hydration, comparable to mineral oil | Agero and Verallo-Rowell, 2004 |
| Oily, acne-prone skin, face | Comedone risk documented by comedogenic classification | Comedogenic classification of fats, dermatological clinical use |
| Regular, substantial dietary use | LDL cholesterol elevation, greater than unsaturated oils | Neelakantan, Seah and van Dam, 2020 |
How to apply this data in practice
- Dry skin, body and hair: coconut oil remains a choice consistent with the available data, including for hydration;
- Oily or acne-prone skin, face: reserve coconut oil for the body and hair, despite its documented benefit for dryness elsewhere;
- Dietary use: treat it in the same range as a saturated fat like butter, to alternate with unsaturated oils rather than use exclusively;
- At-risk cardiovascular profile: factor in the documented LDL elevation before making it a regular, substantial part of your diet.
Precautions
The available data paints a nuanced picture of coconut oil: beneficial for hydrating dry skin, but best limited on acne-prone facial skin and in substantial dietary use given its effect on LDL cholesterol. For the full set of precautions and at-risk populations, see our article coconut oil: dangers, and for general guidance, our safety and precautions guide.
Your questions about coconut oil
Does coconut oil really raise cholesterol?
A 2020 meta-analysis of 16 controlled trials shows it raises LDL cholesterol more than an unsaturated vegetable oil, while also modestly raising HDL. The authors conclude it should not be considered a heart-healthy alternative to unsaturated oils.
Is coconut oil really good for dry skin?
A 2004 clinical trial shows an improvement in hydration comparable, even slightly superior, to mineral oil in people with dry skin. This benefit applies to dry, non-acne-prone skin, not oily skin applied to the face.
How do the comedone risk and the hydration benefit fit together?
The two effects don't concern the same skin type: beneficial for hydrating dry skin, coconut oil can promote comedones on oily or acne-prone skin, particularly on the face where sebaceous-gland density is higher.
Can you use coconut oil on the body if it causes problems on the face?
Yes, that is exactly the logic that follows from the available data: reserve coconut oil for the body and hair with acne-prone skin, where the documented hydration benefit remains relevant without the comedone risk specific to the face.
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