Steviol Glycosides/Platycodon Grandiflorus Flower/Root 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: June 30, 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 Steviol Glycosides/Platycodon Grandiflorus Flower/Root Extract?

Steviol Glycosides/Platycodon Grandiflorus Flower/Root Extract is a plant powered blend that joins the sweet leaf compounds of Stevia rebaudiana with the blossoms and roots of Platycodon grandiflorus, better known as balloon flower. The steviol glycosides are small molecules responsible for stevia’s famous sweetness and its natural antioxidant ability. Balloon flower has a long history in East Asian herbal care where its root was valued for soothing and revitalizing skin. In modern cosmetic labs the two plant sources are harvested, dried and finely milled. The balloon flower pieces undergo a gentle water-or-ethanol soak to pull out their active polyphenols, while stevia leaves are steeped in water then filtered and crystallized to isolate high-purity steviol glycosides. The two extracts are blended into a stable fluid or powder that slips easily into skincare formulas.

Because of its plant origin and protective properties this ingredient shows up in a variety of products: sheet masks, anti-aging serums, brightening creams, daily moisturizers, eye treatments and after-sun gels. Formulators like it because it partners well with vitamins and botanical oils while adding a clean label story.

Steviol Glycosides/Platycodon Grandiflorus Flower/Root Extract’s Cosmetic Benefits/Uses

This dual-plant extract mainly serves as an antioxidant in skincare, which brings several perks to a formula. By neutralizing free radicals created by UV rays, pollution and everyday stress, it helps keep the skin’s own proteins and lipids from breaking down too quickly. That protection can soften the look of fine lines, support a more even tone and extend the shelf life of other delicate ingredients in the product itself.

Who Can Use Steviol Glycosides/Platycodon Grandiflorus Flower/Root Extract

This botanical blend is lightweight and non greasy so it suits most skin types including oily, combination, normal and dry. Sensitive skin generally tolerates it well because the extract is free from added fragrance and harsh solvents, though anyone with known allergies to plants in the aster or bellflower families should tread carefully.

The ingredient is plant derived with no animal by-products which makes it acceptable for both vegetarians and vegans. It is also found in formulas that often carry cruelty free claims but you will still want to check the finished product’s certification.

Current safety data does not flag any specific risk for pregnant or breastfeeding women when the extract is used on skin. Still this is not medical advice and anyone expecting or nursing should run any new skincare product past their doctor just to be on the safe side.

The extract is not known to cause photosensitivity so daytime use is fine. Normal sun protection habits should still be followed.

Potential Side Effects/Adverse Reactions

Responses to topical Steviol Glycosides/Platycodon Grandiflorus Flower/Root Extract differ from person to person. The points below list potential side effects yet they remain uncommon when the ingredient is properly formulated and used as directed.

  • Mild redness or transient warmth right after application
  • Itching or stinging in very reactive skin
  • Contact dermatitis for individuals allergic to Asteraceae or Campanulaceae plants
  • Possible interference with leave-on acids or retinoids if layered too quickly, leading to temporary irritation

If you notice any persistent discomfort discontinue use and consult a healthcare professional or dermatologist.

Comedogenic Rating

Rating: 0 / 5. Steviol Glycosides/Platycodon Grandiflorus Flower/Root Extract is water based, contains no heavy oils or waxes and has molecules too large to lodge inside pores, so it is considered non-comedogenic. That makes it suitable for people who are prone to acne or frequent breakouts.

Keep in mind that the overall formula still matters. If the finished product pairs this extract with rich butters or thick occlusives, those other ingredients could influence how pore friendly the product feels on very oily skin.

Summary

Steviol Glycosides/Platycodon Grandiflorus Flower/Root Extract works primarily as an antioxidant, shielding skin lipids and proteins from free radical damage and helping preserve other delicate actives in a formula. By curbing oxidative stress it can soften early signs of aging and promote a more even looking tone.

Although not as famous as green tea or vitamin C, this plant duo is quietly gaining popularity in K-beauty masks, lightweight serums and clean label moisturizers thanks to its gentle profile and vegan sourcing.

Current data shows the ingredient is low risk for most users with minimal reports of irritation or sensitization. As with any new skincare product it is smart to do a small patch test first to check for personal sensitivity before applying more broadly.

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