Citrus Medica Limonum


Fragrance Synthetic and Natural

No known benefits

Citrus Medica Limonum at a glance

  • Plant, AKA lemon, that contains irritating extracts and oils
  • Contains volatile fragrant compounds
  • Its juices and oils can cause photosensitivity
  • Highly acidic and can disrupt skin’s barrier

Citrus Medica Limonum description

_Citrus medica limonium_ is more commonly known as lemon. It is a potent skin sensitizer. The juice from lemon is often touted as being a natural option for brightening skin. The truth is that lemon juice is highly acidic (has a very low pH of 2) and exceedingly sensitising to skin. Lemon juice applied to skin can cause photosensitivty on exposure to sunlight, which is due to a volatile fragrance chemical known as limonene, which is abundant in lemon juice. Lemon, whether in juice or oil form, is a must to avoid in cosmetics.

Citrus Medica Limonum references

  • Food Science and Human Wellness, July 2022, pages 753-764
  • International Journal of Toxicology, December 2021, pages 5S-38S
  • European Journal of Medicinal Plants, 2013, pages 1-9

Peer-reviewed, substantiated scientific research is used to assess ingredients in this dictionary. Regulations regarding constraints, permitted concentration levels and availability vary by country and region.

Ingredient ratings


Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.


Necessary to improve a formula's texture, stability, or penetration.


Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.


There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.


May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.


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Not rated

We have not yet rated this ingredient because we have not had a chance to review the research on it.