Phaseolus Trilobus Seed 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 Phaseolus Trilobus Seed Extract?

Phaseolus Trilobus Seed Extract comes from the small yellow bean of the Phaseolus trilobus plant, a legume that has grown in Asia and parts of Africa for centuries. The seed is naturally rich in proteins, amino acids, sugars, vitamins and gentle polyphenols, all of which can help bind water and soften skin. Traditional cultures valued the bean as a food source; modern cosmetic labs noticed its high moisture holding capacity and began testing it on skin in the late twentieth century. To make the extract, the cleaned and dried seeds are milled into a fine powder, then soaked in a mix of water or glycerin to pull out the water-soluble compounds. The slurry is filtered, concentrated and preserved, yielding a clear to pale amber liquid that blends easily into skincare formulas. You will usually find Phaseolus Trilobus Seed Extract in hydrating toners, soothing sheet masks, daily moisturizers, anti aging emulsions, lightweight serums and after-sun gels where a boost of soft moisture is desired.

Phaseolus Trilobus Seed Extract’s Cosmetic Benefits/Uses

In topical products this bean extract offers two key functions that translate into noticeable skin benefits

  • Humectant – draws water from the environment and the deeper layers of the skin to the surface, helping to keep skin plump hydrated and comfortable throughout the day. This can reduce the appearance of fine lines caused by dryness and enhance the glide of a formula during application
  • Skin Conditioning – deposits a thin film of natural proteins and sugars that smooth rough patches improve softness and support a healthy skin barrier making the complexion look fresher and feel more supple

Who Can Use Phaseolus Trilobus Seed Extract

This gentle bean extract tends to suit every skin type, from dry and mature to oily and sensitive, because it is light non greasy and focused on hydration rather than heavy oils. Those with a known allergy to legumes should proceed carefully since the source plant is in the same family. The ingredient is entirely plant derived with no animal by-products, making it appropriate for vegans and vegetarians. Current research shows no hormonal activity so it is generally regarded as safe for pregnant or breastfeeding women, yet this is not medical advice and anyone expecting or nursing should discuss new skincare items with a healthcare professional first. Phaseolus Trilobus Seed Extract does not increase photosensitivity so daytime use poses no extra sun risk. It also plays well with common actives like niacinamide or hyaluronic acid and does not interfere with makeup wear.

Potential Side Effects/Adverse Reactions

Responses to topical Phaseolus Trilobus Seed Extract vary by individual. The effects listed below are possible but uncommon when products are formulated correctly.

  • Local redness or mild stinging in very sensitive skin
  • Itchiness or hives in people allergic to beans peanuts or other legumes
  • Transient tight feeling if the formula pairs the extract with high levels of alcohol
  • Rare cases of contact dermatitis marked by swelling or flaking

If any of these issues appear discontinue use and consult a healthcare professional for guidance

Comedogenic Rating

Rating: 0 / 5

Phaseolus Trilobus Seed Extract is a water based, oil free humectant that does not leave waxy or occlusive residues on the skin. Because it is composed mainly of small molecular weight sugars, amino acids and peptides it is quickly absorbed or rinsed away and therefore has virtually no pore clogging potential. This makes it a safe choice for those who struggle with blackheads, whiteheads or cystic flare ups. Only if a finished formula combines the extract with heavy oils or butters could the overall product become comedogenic.

Summary

Phaseolus Trilobus Seed Extract acts as a humectant and skin conditioning agent by pulling water into the upper layers of the skin then laying down a micro-thin veil of natural proteins and sugars that smooth rough texture and reinforce the barrier. Although it is not yet a headline ingredient like hyaluronic acid or niacinamide it is quietly gaining traction in hydrating toners, sheet masks and light lotions thanks to its plant origin and gentle profile. Safety data rate it as low risk with minimal irritation potential but as with any new skincare ingredient it is smart to patch test a product first just to be sure your skin agrees.

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