Crithmum Maritimum Extract
Sea fennel extract – a coastal Apiaceae plant. Contains flavonoids, coumarins, vitamin C. Marketed as a 'natural retinol analog,' but no clinical RCTs support this. Antioxidant activity confirmed in vitro. Possible allergen risk (Apiaceae family).
Evidence by route
Topical application
In vitro antioxidant activity. 'Natural retinol' marketing claims are not supported by independent RCTs. Contact reactions possible due to Apiaceae family origin.
- CIR Cosmetic Ingredient Review safety assessment.
How to read tiers A–F
- CWeak evidence. In vitro data, open-label studies, or expert consensus
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Moderate
- Pregnancy
- Caution
- Suitable for
- Normal, Dry, Combination, Oily
- Use with caution
- Sensitive
About this ingredient
Crithmum Maritimum Extract (sea fennel) is derived from a coastal Apiaceae plant growing on the rocky shores of the Mediterranean and Atlantic. In Italy and Greece it's used in cooking as 'sea dill'. Composition. Flavonoids (rutin, hesperidin), phenolic acids (chlorogenic, caffeic), coumarins, essential oils, vitamin C, minerals. Manufacturers market the extract as a 'natural retinol analog' due to its ability to activate signaling pathways linked to keratinocyte differentiation. Mechanism. In vitro the extract stimulates aquaporin-3 and filaggrin expression – barrier function markers (Plainfossé 2020). Antioxidant activity is confirmed in standard DPPH tests. Direct comparison with retinol for skin remodeling potency has not been done. Where applied. Mid-range and premium anti-aging serums and creams, ampoules and masks. In Spain – Apivita Wine Elixir, Klorane, niche Mediterranean brands (Toskani, Skeyndor) and as a 'natural retinol alternative' marketing claim in Mediterranean cosmetics. Evidence base. No human RCTs directly confirming a retinol-like effect. Main data are in vitro and on 3D skin models. Claims of a 'natural retinol alternative' are marketing without clinical confirmation. Safety and controversies. Allergic reactions possible in patients with hay fever and Apiaceae allergy (celery, carrot, fennel) – cross-sensitization. High coumarin concentrations can cause phototoxic reactions, but this is rare at cosmetic concentrations. Pregnancy and lactation – with caution. Coumarins and phototoxic components are not recommended in pregnancy as a precautionary measure. No direct evidence of harm, but safety data are insufficient. Best suited to: mature non-sensitive skin without Apiaceae allergy. Not for rosacea, perioral dermatitis, sensitive skin, or pregnancy.
Frequently asked questions
Is Crithmum Maritimum Extract safe during pregnancy?
Crithmum Maritimum Extract should be used with caution during pregnancy. Consulting a dermatologist or OB-GYN is advisable.
What skin types is Crithmum Maritimum Extract for?
Crithmum Maritimum Extract suits: normal, dry, combination, oily. Use with caution in: sensitive.
What is Crithmum Maritimum Extract and what does it do in cosmetics?
Sea fennel extract – a coastal Apiaceae plant.
What's the INCI name for Crithmum Maritimum Extract?
The INCI name is Crithmum Maritimum Extract. It may also appear as: Sea Fennel Extract, Rock Samphire Extract.
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