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SupplementScience

Coconut Oil Side Effects & Safety

Reviewed by·PharmD, BCPS

This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer

Safety Profile

Overall safety rating: Safe with Caution

Potential Side Effects

  • GI distress (nausea, diarrhea, cramping) — common when starting, especially at full doses; start with 1 teaspoon and increase gradually over 1-2 weeks
  • LDL cholesterol increase — coconut oil reliably raises LDL by approximately 10-15% in most studies; monitor lipid panels if consuming regularly
  • Weight gain if added to (rather than replacing) existing dietary fat — coconut oil is 120 calories per tablespoon
  • Acne exacerbation — coconut oil is comedogenic (pore-clogging) when applied to facial skin; use on body skin only
  • Allergic reactions — rare coconut allergy exists; distinct from tree nut allergy but possible

Drug & Supplement Interactions

  • Cholesterol-lowering medications (statins) — coconut oil raises LDL, potentially counteracting statin effects; discuss with physician
  • Antidiabetic medications — MCTs can affect blood glucose and insulin sensitivity; monitor blood sugar when combining
  • MCT oil supplements — additive MCT load may cause excessive GI distress; moderate total MCT intake
  • Ketogenic diet medications — coconut oil's ketogenic effects may alter medication requirements for epilepsy patients on controlled ketogenic protocols

Maximum Dose

Do not exceed: 3 tablespoons/day (42g); higher doses significantly increase saturated fat intake and LDL cholesterol; coconut oil should replace — not add to — existing dietary fat

Full Coconut Oil Guide

References

  1. Reger MA, Henderson ST, Hale C, Cholerton B, Baker LD, Watson GS, Hyde K, Chapman D, Craft S (2004). Effects of beta-hydroxybutyrate on cognition in memory-impaired adults. Neurobiology of Aging. DOI PubMed
  2. Cardoso DA, Moreira AS, de Oliveira GM, Raggio Luiz R, Rosa G (2015). A coconut extra virgin oil-rich diet increases HDL cholesterol and decreases waist circumference and body mass in coronary artery disease patients. Nutricion Hospitalaria. DOI PubMed
  3. St-Onge MP, Jones PJ (2002). Physiological effects of medium-chain triglycerides: potential agents in the prevention of obesity. The Journal of Nutrition. DOI PubMed
  4. Lieberman S, Enig MG, Preuss HG (2006). A review of monolaurin and lauric acid: natural virucidal and bactericidal agents. Alternative and Complementary Therapies.
  5. Nevin KG, Rajamohan T (2010). Effect of topical application of virgin coconut oil on skin components and antioxidant status during dermal wound healing in young rats. Skin Pharmacology and Physiology. DOI PubMed
  6. Sacks FM, Lichtenstein AH, Wu JHY, Appel LJ, Creager MA, Kris-Etherton PM, Miller M, Rimm EB, Rudel LL, Robinson JG, Stone NJ, Van Horn LV (2017). Dietary fats and cardiovascular disease: a presidential advisory from the American Heart Association. Circulation. DOI PubMed