Morus Bombycis Stem Extract: What Is It, Cosmetic Uses, Benefits & Side Effects

Curious about this ingredient? In this article we're explaining exactly what it is and why it's used within cosmetic formulations.
Updated on: July 1, 2025
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We verify all information on this page using publicly available nomenclature standards from The Personal Care Products Council (PCPC), the European Commission's CosIng database and documentation provided directly by ingredient manufacturers. Our analysis is based on technical data from these sources to ensure accuracy and reliability.

What Is Morus Bombycis Stem Extract?

Morus Bombycis Stem Extract comes from the woody stems of the mulberry tree Morus bombycis in the Moraceae family. Those stems are naturally rich in plant compounds such as flavonoids, stilbenes and other polyphenols that help the tree defend itself against stress and microbes. Records show mulberry parts have been valued in East Asian textile dyeing and folk skincare for centuries, which led modern formulators to study the stem for its protective and soothing properties. To obtain the extract, harvested stems are cleaned, dried, milled then steeped in a skin-safe solvent like water or glycerin. The liquid is filtered and concentrated, producing a brownish botanical extract that slots easily into water-based phases of cosmetics. You will spot it in sheet masks, anti-aging serums, brightening essences, lightweight moisturizers, clarifying toners and even scalp tonics where a gentle botanical boost is wanted.

Morus Bombycis Stem Extract’s Cosmetic Benefits/Uses

Formulators choose this multifunctional botanical for several helpful reasons:

  • Antimicrobial – helps keep formulas bacteria balanced and supports blemish-prone or flaky skin by limiting surface microbes
  • Antioxidant – supplies polyphenols that neutralize free radicals which can contribute to dullness and premature lines, aiding in overall skin vitality
  • Astringent – gives a light tightening feel that can reduce the look of enlarged pores and excess oil making it handy in toners and oil-control products
  • Emollient – leaves a soft conditioned finish on skin or hair improving comfort and smoothness without a heavy film

Who Can Use Morus Bombycis Stem Extract

This extract suits most skin types including normal, oily and combination complexions thanks to its lightweight texture and antimicrobial antioxidants. Sensitive skin generally tolerates it well because the polyphenols are calming, though the mild astringency could feel tight on very dry or barrier-compromised skin so those users may want to pair it with a richer moisturizer.

The ingredient is plant derived and free of animal by-products so it aligns with vegan and vegetarian values. No common animal-based processing aids are used during extraction.

Current data shows no specific hazards for pregnant or breastfeeding women when the extract is used topically at cosmetic levels, but this is not medical advice. Expectant or nursing mothers should run any new skincare routine past their doctor to stay on the safe side.

Morus Bombycis Stem Extract is not known to cause photosensitivity and can be used in day or night formulas. It blends smoothly with other common actives and does not interfere with mineral or chemical sunscreens.

Potential Side Effects/Adverse Reactions

Responses to topical Morus Bombycis Stem Extract vary by individual. The following outlines potential side effects that are possible yet unlikely for the average user when the ingredient is formulated correctly.

  • Mild redness or stinging on very sensitive skin
  • Dry or tight feeling if layered with strong exfoliants or alcohol heavy products
  • Allergic contact dermatitis in rare cases of mulberry plant allergy
  • Eye irritation if the product accidentally gets into the eyes

If any of these reactions occur stop using the product and seek advice from a healthcare professional.

Comedogenic Rating

Rating: 0 / 5

Morus Bombycis Stem Extract is almost entirely water soluble and contains virtually no heavy oils or waxes so it has little chance of blocking pores. Its polyphenols are lightweight and rinse clean without leaving an occlusive film which is why formulators place it in toners serums and gels rather than thick creams. This makes it well suited for acne-prone or breakout-prone skin.

Keep in mind that overall product composition matters. If the extract sits in a rich balm or oil-heavy formula the finished product could still clog pores even though the extract itself does not.

Summary

Morus Bombycis Stem Extract delivers four key perks: it suppresses unwanted microbes, sweeps up free radicals, gives a mild pore-tightening feel and leaves skin or hair feeling soft. These benefits come from the plant’s natural flavonoids and other polyphenols which neutralize oxidative stress, disturb bacterial membranes and create a light protective film on the surface.

While not a headliner like vitamin C or niacinamide this mulberry stem extract is quietly gaining traction in sheet masks clarifying toners and lightweight moisturizers because it offers several useful actions without heaviness or fragrance issues.

Current research and cosmetic usage levels rate it as a very safe ingredient with low irritation risk. As with any new skincare it is smart to patch test a fresh product first to be sure your skin agrees.

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