ROUND LAB Birch Juice Sunscreen: the hydrating SPF50+ that wins over dry skin

What birch juice brings to a sunscreen formula

Birch sap — harvested from Betula platyphylla trees in Korea during early spring — is a mineral-rich liquid containing xylitol, amino acids, vitamins B and C, and a profile of trace minerals that differ significantly from plain water. In skincare, birch sap acts as a hydrating base that provides more sustained moisturising effect than water-only formulas because of its natural humectant compounds. ROUND LAB has built its signature product line around birch juice, and the Birch Juice Moisturizing Sunscreen SPF 50+ PA++++ 50ml is the SPF product that extends this hydrating base into sun protection territory.

Hydration from a sunscreen: why it matters

Standard chemical sunscreen formulas often feel dehydrating after application because the solvents used to dissolve UV filter compounds have a mild drying effect on the skin surface. This makes many people — particularly those with dry or dehydrated skin — underuse their SPF rather than experience the drying sensation twice daily. ROUND LAB's Birch Juice Sunscreen addresses this directly: the birch sap base provides immediate and sustained hydration that counteracts the typical SPF drying effect, allowing generous, twice-daily application without the uncomfortable aftermath that reduces SPF compliance in dry skin types.

Side-by-side with the Birch Juice Tone-Up Sun Cream

ROUND LAB offers two birch juice sun care products: the Birch Juice Moisturizing Sunscreen (pure moisture focus, no tone modification) and the Birch Juice Moisturizing Tone-Up Sun Cream SPF50+ PA++++ 50ml (moisture plus a subtle brightening, skin-tone-evening effect). The Sunscreen is the right choice for everyday use when skin tone is already even and no brightening is needed. The Tone-Up Sun Cream is the choice for days when uneven tone needs visual correction or for skin actively working on hyperpigmentation where the tone-up effect amplifies the routine's brightening aim. Both can be used by the same person based on the day's skin condition.

Integrating the Dokdo Cleanser for a ROUND LAB morning system

ROUND LAB 1025 Dokdo Cleanser 150ml is named after the mineral-rich deep sea water sourced from 1025 metres below the sea near Dokdo Island. This mineral complex is included in the cleanser base, providing trace elements that support skin barrier function while the cleanser removes overnight buildup. As a morning cleanser, the Dokdo Cleanser prepares a mineralised, barrier-supportive surface for the Birch Juice Sunscreen to work on — a ROUND LAB system where the mineral approach is consistent from cleansing through to SPF.

Layering the Birch Juice Sunscreen under makeup

The ROUND LAB Birch Juice Moisturizing Sunscreen applies transparently and dries to a comfortable finish that is neither greasy nor powdery. This neutral finish makes it compatible with both matte and dewy foundation finishes without creating the cakiness or pilling that some hydrating SPF formulas produce under makeup. For dry skin types wearing foundation, the Birch Juice Sunscreen eliminates the need for a separate primer or moisturizer under makeup — the birch sap hydration and the SPF protection together constitute a sufficient base. A two-minute wait after SPF application before applying makeup ensures the SPF film is set and stable.