Ingredient Category  ·  Evidence-led  ·  16 in catalogue  ·  Reviewed 2026-07-17

Botanicals

Botanicals are plant-derived actives, and they range from genuinely well-studied (centella, green tea, licorice) to mostly marketing. The category is where hype concentrates, so it is also where honest evidence-flagging matters most. Many are excellent soothing antioxidants; few are the miracle their packaging implies.

What botanicals are, and when to reach for them

The strongest botanicals tend to be anti-inflammatory antioxidants. Centella asiatica supports barrier repair and calming; green tea (EGCG) is a well-studied antioxidant; licorice root helps fade pigment. Newer soothing actives like ectoin, beta-glucan and heartleaf have growing support for sensitive skin.

This group also includes microbiome ingredients — pre-, pro- and postbiotics, and ferment filtrates like galactomyces — an active research area where enthusiasm currently outpaces hard clinical proof. We include them because they are legitimate and interesting, while being clear that "emerging" means the jury is still out.

The botanicals in our catalogue

Every botanical we cover, with what it does and the concerns it is most often used for. Each name links to its full glossary entry.

IngredientWhat it isMost used for
Centella AsiaticaOne of the most clinically validated plant-based actives.Redness, Aging
Green Tea ExtractRich in catechins, primarily EGCG — a potent free-radical scavenger, anti-inflammatory, and mild androgen receptor inhibitor relevant to sebum reduction.Aging, Acne, Oiliness
ResveratrolA polyphenol from grape skin, red wine and blueberries.Aging, Redness
Licorice Root ExtractA well-studied plant-derived brightener.Pigmentation, Redness, Dullness
Rosehip Seed OilCold-pressed oil rich in linoleic acid (36–45%), alpha-linolenic acid (19–30%) and naturally occurring trace retinoic acid.Aging, Pigmentation, Dryness
Aloe VeraContains polysaccharides, glycoproteins, aloesin, anthraquinones and minerals with proven wound-healing, anti-inflammatory, moisturising and mild brightening properties.Redness, Dryness, Pigmentation
Neem ExtractAyurvedic botanical with potent antibacterial, antifungal and anti-inflammatory properties.Acne, Oiliness, Redness
Turmeric ExtractCurcumin is a potent anti-inflammatory, antioxidant and tyrosinase-inhibiting brightener.Redness, Pigmentation, Acne
EctoinA natural extremolyte produced by extremophilic bacteria to protect cellular structures from environmental stress.Redness, Aging, Dryness
Colloidal OatmealFDA-approved as an OTC skin protectant.Redness, Dryness
SulforaphaneAn isothiocyanate from broccoli and broccoli sprouts, and a potent activator of NRF2, which switches on the body's own antioxidant and protective enzymes.Aging, Redness
Beta-GlucanA polysaccharide drawn from oats, barley, yeast, mushrooms or algae.Dryness, Redness, Aging
Galactomyces Ferment FiltrateThe filtered liquid left after culturing the yeast Galactomyces — the fermentation active popularised by Japanese essences.Dullness, Texture, Pigmentation
Heartleaf ExtractAn extract of Houttuynia cordata, a herb long used in East Asian medicine and now a staple of Korean "cica-adjacent" soothing products.Redness, Acne
PostbioticsThe beneficial by-products of microbial fermentation — and the inactivated microbes themselves — used to support the skin's microbiome without the instability of live bacteria.Redness, Dryness
PrebioticsNon-living ingredients — typically sugars, oligosaccharides and polyols — that act as selective food for the beneficial microbes on your skin, helping a balanced microbiome flourish.Redness, Dryness

What they are best for

Across the catalogue, the botanicals here are most often used for these concerns — each links to its evidence-led concern hub with a full routine:

Redness (13), Aging (7), Dryness (7), Pigmentation (5), Acne (4), Oiliness (2), Dullness (2), Texture (1).

Pairs and avoid, at a glance

These commonly pair well with: Niacinamide, Centella Asiatica, Hyaluronic Acid, Vitamin C, Panthenol, Ceramides. Pairing is about getting more from a routine without adding irritation — humectants, barrier lipids and niacinamide are frequent partners here.

Nothing in this category carries a hard "avoid combining" flag in our catalogue — these are generally cooperative actives. Always introduce one new product at a time regardless.

Common questions

Are natural or botanical ingredients better for skin?

Not inherently. "Natural" is a marketing term, not a measure of safety or efficacy — some botanicals are potent and well-evidenced, others do little, and a few are common irritants (essential oils, for instance). What matters is the specific ingredient and the evidence behind it, not whether it came from a plant.

Which botanical ingredient has the best evidence?

Centella asiatica and green tea (EGCG) are among the best-supported for soothing and antioxidant benefits, and licorice root has reasonable evidence for brightening. These have real clinical backing, whereas many trendier extracts are supported mainly by lab or in-vitro data rather than results on actual skin.

Do microbiome skincare ingredients (pre/pro/postbiotics) work?

It is a genuinely promising but still-emerging area. There is early evidence that supporting the skin microbiome can help barrier function and calm reactive skin, but the clinical proof is thinner than the marketing suggests. Reasonable to try for sensitivity; too soon to treat as established.

Are botanical extracts safe for sensitive skin?

Often, but not always. Soothing botanicals like centella, oat and beta-glucan are excellent for sensitivity, while fragrant plant extracts and essential oils are among the more common triggers. Read for the specific extract, patch test, and be wary of products that lean on "botanical" as a selling point without naming what is doing the work.

Why you can trust this page: Skin Stacker is independent. No ads, no affiliate links, no paid placement, no product to sell. Every ingredient here is rated on the evidence alone — which is the whole point.

Explore other categories

Browse the rest of the ingredient library: Acids, Retinoids, Vitamins — or see the full ingredient categories index.

References

  1. Bylka W et al. (2014). Centella asiatica in dermatology: an overview. Phytother Res
  2. Zheng XQ et al. (2024). Green Tea Catechins and Skin Health. Antioxidants (Basel)
  3. Ratz-Łyko A, Arct J (2019). Resveratrol as an active ingredient for cosmetic and dermatological applications: a review. J Cosmet Laser Ther
  4. Hollinger JC et al. (2018). Are Natural Ingredients Effective in the Management of Hyperpigmentation? A Systematic Review. J Clin Aesthet Dermatol
  5. Oargă Porumb DP et al. (2024). Unveiling the mechanisms for the development of rosehip-based dermatological products: an updated review. Front Pharmacol
  6. Surjushe A et al. (2008). Aloe vera: a short review. Indian J Dermatol
  7. Alzohairy MA (2016). Therapeutics Role of Azadirachta indica (Neem) and Their Active Constituents in Diseases Prevention and Treatment. Evid Based Complement Alternat Med
  8. Vaughn AR et al. (2016). Effects of Turmeric (Curcuma longa) on Skin Health: A Systematic Review of the Clinical Evidence. Phytother Res
  9. Kauth M, Trusova OV (2022). Topical Ectoine Application in Children and Adults to Treat Inflammatory Diseases Associated with an Impaired Skin Barrier: A Systematic Review. Dermatol Ther (Heidelb)
  10. Ilnytska O et al. (2016). Colloidal Oatmeal (Avena Sativa) Improves Skin Barrier Through Multi-Therapy Activity. J Drugs Dermatol
  11. Talalay P et al. (2007). Sulforaphane mobilizes cellular defenses that protect skin against damage by UV radiation. Proc Natl Acad Sci U S A
  12. PubMed — β-Glucan extracts for skin health
  13. Miyamoto K et al. (2023). Significant Reversal of Facial Wrinkle, Pigmented Spot and Roughness by Daily Application of Galactomyces Ferment Filtrate-Containing Skin Products for 12 Months-An 11-Year Longitudinal Skin Aging Rejuvenation Study. J Clin Med
  14. Rafiq S et al. (2022). Pharmacological Effects of Houttuynia cordata Thunb (H. cordata): A Comprehensive Review. Pharmaceuticals (Basel)
  15. Prajapati SK et al. (2025). Microbiome and Postbiotics in Skin Health. Biomedicines
  16. Han JH, Kim HS (2024). Skin Deep: The Potential of Microbiome Cosmetics. J Microbiol

Written and reviewed by JoAnn, editor of Skin Stacker — see our methodology and editorial standards.
Reviewed / last updated: 2026-07-17. For informational purposes only — not a substitute for medical advice.