Sooryehan Fermented

Fermentation in skin care is a microbial process that transforms raw ingredients into more bioactive forms. For Sooryehan's traditional Korean herbal ingredients - roots, plants, and botanicals drawn from the Korean medicine canon - fermentation serves two specific functions: it breaks large molecular compounds into smaller fragments that penetrate the skin barrier more readily, and it generates new bioactive secondary metabolites during the fermentation process that are not present in the raw unfermented ingredient.

This is not the same as simple extraction or dilution. A fermented herbal extract has a different chemical composition and biological activity than a heat or solvent extract of the same herb. The Hyobidam Fermented line's naming convention (Fermented Sap, Fermented Cream, Fermented Sunscreen) indicates that every product in the line uses these fermented extracts rather than conventional herbal extract formats. This is why Sooryehan's fermented products typically command a premium price relative to the brand's non-fermented lines.

The Hyobidam Fermented Cleansing Foam 160ml is the first step in the Hyobidam Fermented routine. Including fermented actives in a cleanser is an unusual approach - most cleansing products focus purely on removing impurities and don't carry treatment actives because the rinse-off contact time is brief. Sooryehan includes fermented herbal extracts here on the principle that even the short contact window of a cleanser delivers some benefit if the active compounds are in a highly absorbable fermented form.

At 160ml it's a standard foam cleanser size. Use it as a daily morning and evening cleanser, lathering on damp skin and rinsing thoroughly. The foam format tends to suit normal to slightly oily skin; dry skin types may prefer to use the Cleansing Foam only in the evening and a gentler oil or milk cleanser in the morning to avoid stripping the natural lipid barrier at the first step of a hydration-focused routine.

The Hyobidam Fermented Sap 150ml is the toner step in the Hyobidam Fermented routine. "Sap" in Korean skin care naming (수액, suaek) refers to a lightweight water-like liquid - in this case, the fermented herbal active formula delivered in a water-weight texture that absorbs fully without residue. It's applied after cleansing to start the active ingredient absorption process.

At 150ml it's the standard size for a Korean toner step. The Fermented Sap can be applied with a cotton pad to sweep across the face or pressed directly with the hands using the layering technique. Given the fermented active content, applying in two or three thin layers (the multi-layer technique) drives more of the fermented compounds into the skin at this early step before the subsequent products add their own layers. The Sap is the lightest product in the Hyobidam Fermented sequence and delivers the foundational dose of fermented actives that the subsequent products build on.

The Hyobidam Fermented Latex 150ml is the emulsion step - a mid-weight product between the toner and cream, with a consistency described as latex-like (heavier than a water-based toner but lighter and more flowing than a cream). "Latex" here refers to the texture: a plant latex-inspired, slightly viscous emulsion that delivers both water-soluble and lipid-phase ingredients from the fermented herbal complex.

Applied after the Fermented Sap toner and before the Fermented Cream, the Latex Emulsion builds up the hydration and active ingredient layers gradually. It's formulated to seal part of what the toner delivered while also contributing its own fermented active dose. At 150ml it's a generous size that lasts several months with daily use. The Latex's texture makes it suitable as a standalone moisturizer for normal skin or as an intermediate step for dry skin that benefits from the full three-layer moisture build of Sap, Latex, and Cream together.

The Hyobidam Fermented Jin Essence 45ml is the most concentrated active product in the Hyobidam Fermented line, applied between the toner and the cream for an intensive fermented active dose. "Jin" indicates a premium or intensified version of the Hyobidam essence formula - higher active concentration and typically a more complete ginsenoside or herbal complex than the standard line essences.

At 45ml the Jin Essence is sized for targeted use - it's not a first-buy product for most users but rather an add-on after you've established the Sap toner and Latex emulsion as the foundation. Apply a small amount (three to four drops) after the Fermented Sap and before the Latex or Cream, pressing into skin rather than wiping, and allow 30 seconds to absorb before the next step. Used this way, the Jin Essence adds the highest active dose in the routine at the step where skin absorption is still at its peak.

The Hyobidam Fermented Cream 50ml is the final sealing step in the Hyobidam Fermented routine. It's a rich moisturizer that locks in all the preceding active layers while contributing its own dose of fermented herbal compounds. The texture is denser than the Latex Emulsion, designed to create a semi-occlusive layer that holds the moisture delivered by the Sap and Latex steps in place throughout the day or overnight.

The Fermented Eye Cream 25ml is the targeted complement to the Cream, formulated specifically for the thinner and more sensitive skin around the eye area. Apply the Eye Cream at the same step as the face cream, using a smaller amount tapped gently around the orbital bone with the ring finger. The 25ml size lasts two to four months with daily use at the standard pea-per-eye amount. The Cream and Eye Cream together are available as a combo set with the Liquid Essence in the Hyobidam Fermented line's combined selection format on Skinsli.

The Hyobidam Fermented Sunscreen is available in 60ml and 100ml. It's the final step in the Hyobidam Fermented morning routine and is Sooryehan's application of the fermentation technology to sun protection. The formula combines UV filters with fermented herbal botanical actives, making it a dual-function product: it protects from UV damage while continuing to deliver the fermented herbal benefits during the sun-exposure hours when antioxidant support is most relevant.

The 60ml is the smaller and more practical option for regular daily use at a single-face amount; the 100ml is the value size for daily users or sharing. At the SPF-compliant quarter-teaspoon full-face dose, the 60ml lasts about four months. The Fermented Sunscreen's inclusion in the line means you can run the complete Hyobidam Fermented routine from cleanser to SPF within a single product family.

Morning routine: 1) Hyobidam Fermented Cleansing Foam 160ml (cleanse, rinse); 2) Hyobidam Fermented Sap 150ml (toner, 2-3 layers); 3) Hyobidam Fermented Jin Essence 45ml if included (press into skin); 4) Hyobidam Fermented Latex 150ml (emulsion); 5) Hyobidam Fermented Eye Cream 25ml (around eye area); 6) Hyobidam Fermented Cream 50ml (face); 7) Hyobidam Fermented Sunscreen 60ml or 100ml (sun protection, final step).

Evening routine: same steps 1-6, skip sunscreen; you can apply the Cream in a slightly more generous layer at night since you don't need to layer SPF over it. The full seven-product morning routine is more complete than most users will run daily; a practical core routine of Sap + Latex + Cream (or Sap + Jin Essence + Cream) covers the active fermented delivery without all seven steps. Add each additional product incrementally as you confirm the formulas work for your skin.