What Is Centella Asiatica (Cica)? Its Place in Soothing Care

What centella does: This plant extract, also known as cica, may help soothe the skin, reduce the look of redness, and support moisture and the barrier in dry skin. The clearest data comes not from cosmetic use but from wound and post-laser care studies. Evidence for its use on sensitive skin is more limited. Being plant-based does not mean it is gentle for everyone; contact allergy has been reported, although rarely.

Centella, cica, gotu kola: Names of the same plant

Centella asiatica is a plant that has long been traditionally used in Asia. It is also known as gotu kola. The name "cica" is associated with the Latin word cicatrix, meaning scar, and is used mostly in marketing language. If "cica" is written on the front but the plant name does not appear on the ingredient list, question what the product is based on.

The substances thought to be the source of the effect in products are triterpene saponins. Their amounts in the plant vary greatly depending on where it grows; the total saponin ratio can reach up to 8%.

This last line matters. Two extracts sold under the same name can be very different. This is the biggest reason why it is hard to transfer results from studies to an arbitrary "cica cream."

What does centella do? Evidence map

Laboratory and animal data are positive for fibroblast stimulation, collagen production and reducing inflammation. Human data is in the minority and has mostly been done with special formulations. Below you can see how much information exists in humans.

One review describes clinical studies as clearly sparse and calls for more comprehensive trials. So the word "soothing" is supported to some degree, but calling it a "proven barrier repairer" would be an exaggeration.

Why doesn't the laboratory result show up the same way in a cream?

Most of the studies showing that asiaticoside increases collagen and wound closure were done in animals or in cell culture. For example, in diabetic rats 0,4% asiaticoside accelerated delayed wound healing. Three things make it difficult to carry this result into a face cream:

• The extract is not standard. Most studies do not describe the extract used in detail, and the proportion of components in the plant varies by growing location.
• The ratio is unknown. The 7% extract or standard gel used in clinical studies, and the cream on the shelf, may not contain the same amount of active.
• The target is different. On a burn or open wound the skin's barrier is already damaged. How much passes through into healthy facial skin when applied is a separate question.

Cream or gel? Formula difference

If dry skin and moisture are your goal, texture also seems important. In a cosmetic formula study, the 5% centella extract emulsion gave the most positive result for skin moisture and barrier; an oil-in-water emulsion, not water-in-oil, significantly increased moisture compared with a hydrogel containing the same ratio of extract. Although this is a single small study, the practical meaning is sensible: if you are dry, a cream or lotion form may feel more comfortable than a gel. If you prefer a light gel because of oily skin, that is also reasonable; just keep your moisture expectations low.

Does it really soothe sensitive skin?

Honest answer: it may work for some people, but very few well-controlled studies show it. "Sensitive skin" is itself a definition that varies from person to person. In one person the cause of redness may be a dried-out barrier, in another rosacea, and in another a fragrance allergy. Centella cannot be expected to act the same way on all of these.

Still, there are situations where trying it may be reasonable:

• Tendency to dryness and mild irritation: If you feel tightness after cleansing or a change in weather, it can be considered as part of a soothing moisturizer.
• Skin using actives: For comfort while using actives such as azelaic acid or retinol. There is no direct data showing that centella reduces the irritation of these products.
• Skin with a tired barrier: In a simple cream, together with ceramide. In a small study the two gave similar results; do not expect superiority.
• Oily and acne-prone skin: It can be used as a soothing agent in a light formula; it is not an acne treatment. See the oily skin care article.

If you do not know your skin type, a skin analysis is a good first step. If you are concerned about sensitivity, reducing the number of products for a while, rather than constantly trying new ones, often makes a difference.

What should you read on the label?

• Is the plant name on the list? Names like "Centella Asiatica Extract," "Centella Asiatica Leaf Extract" or "Madecassoside." The "cica" on the front is not enough.
• Where is it in the list? Toward the end, the ratio is probably low. Since the label does not state a percentage, you cannot be certain.
• Pure component or extract? Madecassoside or asiaticoside as a single component says something clearer, but in products applied to the skin the ratio is often not stated.
• Is there fragrance or essential oil? If you are buying it for sensitive skin, heavy fragrance in a product sold as soothing is contradictory.
• Is the alcohol content high? Alcohol at the top of the list can sting sensitive skin.

How to add it to a routine?

1. Try first. On the inner arm or elbow crease, twice a day, for 7-10 days. This is where you will most easily catch the allergy risk with plant extracts.
2. If it is a serum: After cleansing, before moisturizer. If it is a cream: as the final step after cleansing, with sunscreen on top in the morning.
3. One new product at a time: Do not start another active in the same period. If a problem arises, you will not know which one caused it.
4. Give it time to decide: 2-4 weeks is a reasonable starting point for observation; this figure is derived from the general caution rule rather than from studies. If redness increases, stop without waiting.
5. With other actives: It is common to use it together with gentle ingredients such as niacinamide or ceramide. There is limited superiority data specific to these pairings.

Who should be careful?

It is said to be non-toxic at the recommended dose and side effects are rare. However, local allergic reactions and burning have been reported with external use. Among published cases, there was hand and finger eczema after about three months of use, and an itchy, blistering reaction after 20 days of use. In a small patch study, two people with allergic dermatitis reacted both to the centella cream and the placebo cream, so the cause may be the base ingredients. In short, the allergy may come from the extract or from the formula.

• Allergy history: Be careful if you have reacted to plant extracts or many cosmetics.
• Open wounds and burns: The products in clinical studies are controlled medical formulations. Do not apply a cosmetic cica cream to an open wound; consult your doctor or pharmacist for wound care.
• Rosacea and eczema: A cosmetic product does not replace treatment. Ask your doctor before adding a new product.
• Pregnancy and breastfeeding: In a cream study on stretch marks in pregnant women, no harmful effects were reported in mother or baby; but this study's formula contained other ingredients too, and the researchers call for more studies. There is little data specific to breastfeeding. If you plan to use it, consult your doctor first, especially if it will be applied to the chest area.
• Oral use: Centella taken as a supplement is not the subject of this article; do not start without a doctor's recommendation.

How should you adjust your expectations?

If you use it for an anti-aging purpose, do not decide before waiting at least 6 weeks, but for this purpose too, pure centella data is almost nonexistent. If redness is still there after 4-6 weeks, or if every product stings, see a dermatologist. An underlying condition may lie beneath persistent redness, and it cannot be resolved with cosmetics.