Round Lab Birch Juice Mild-Up UVLOCK SPF 50

$24.00

What it is: A gentle physical sunscreen formulated with non-nano Zinc Oxide and Birch Tree Sap to provide broad-spectrum SPF 50 protection while hydrating and calming sensitive skin.

Who it's for: All skin types; especially sensitive, dry, and reactive skin.

Key ingredients:

  • Zinc Oxide (Non-Nano): A mineral UV filter that reflects both UVA and UVB rays without penetrating the skin, making it the gentlest sunscreen option for sensitive and reactive skin

  • Birch Tree Sap (Betula Platyphylla Japonica Juice): Rich in minerals and antioxidants, nourishes and hydrates while calming inflammation

  • Glyceryl Glucoside: Promotes aquaporin formation — essentially activating the skin's own moisture channels for deeper, longer-lasting hydration

  • Vita Hyaluronic Acid Complex (Sodium Hyaluronate + Hyaluronic Acid): Layers hydration at the surface and deeper levels for a plump, healthy complexion

How to use: As the final step of your skincare routine, apply a generous amount evenly across the face, spreading it out to create a protective barrier. Reapply as needed throughout the day.

Full ingredient list: Water, Cyclohexasiloxane, Butyloctyl Salicylate, Propanediol, Propylheptyl Caprylate, Isododecane, Caprylyl Methicone, Polyglyceryl-3 Polydimethylsiloxyethyl Dimethicone, Methyl Methacrylate Crosspolymer, Methyl Trimethicone, Disteardimonium Hectorite, Magnesium Sulfate, Triethoxycaprylylsilane, 1,2-Hexanediol, Polyglyceryl-2 Dipolyhydroxystearate, Polymethylsilsesquioxane, Lauryl Polyglyceryl-3 Polydimethylsiloxyethyl Dimethicone, Butylene Glycol, Betula Platyphylla Japonica Juice, Glyceryl Caprylate, Caprylyl Glycol, Ethylhexylglycerin, Artemisia Annua Extract, Anthemis Nobilis Flower Oil, Sodium Hyaluronate, Pinus Sylvestris Leaf Oil, Glycerin, Nelumbo Nucifera Leaf Extract, Cryptomeria Japonica Leaf Extract, Saccharomyces Ferment Filtrate, Tocopherol, Glyceryl Glucoside, Hyaluronic Acid, Ascorbic Acid, Zinc Oxide.

Chemist's Notes:
Reviewed by April Basi, cosmetic chemist
Zinc oxide sitting at the very end of the ingredient list is actually correct for a physical sunscreen — it's an active ingredient listed separately from the base formula, not an indication of low concentration. The non-nano particle size matters here because nano zinc oxide can penetrate skin and raise safety concerns, while non-nano sits on the surface and physically reflects UV — a meaningful distinction for sensitive skin. One thing to note: despite the "fragrance-free" positioning, Anthemis Nobilis Flower Oil (Roman chamomile) and Pinus Sylvestris Leaf Oil are natural fragrant components, so if you're strictly fragrance-sensitive, patch test first.

What it is: A gentle physical sunscreen formulated with non-nano Zinc Oxide and Birch Tree Sap to provide broad-spectrum SPF 50 protection while hydrating and calming sensitive skin.

Who it's for: All skin types; especially sensitive, dry, and reactive skin.

Key ingredients:

  • Zinc Oxide (Non-Nano): A mineral UV filter that reflects both UVA and UVB rays without penetrating the skin, making it the gentlest sunscreen option for sensitive and reactive skin

  • Birch Tree Sap (Betula Platyphylla Japonica Juice): Rich in minerals and antioxidants, nourishes and hydrates while calming inflammation

  • Glyceryl Glucoside: Promotes aquaporin formation — essentially activating the skin's own moisture channels for deeper, longer-lasting hydration

  • Vita Hyaluronic Acid Complex (Sodium Hyaluronate + Hyaluronic Acid): Layers hydration at the surface and deeper levels for a plump, healthy complexion

How to use: As the final step of your skincare routine, apply a generous amount evenly across the face, spreading it out to create a protective barrier. Reapply as needed throughout the day.

Full ingredient list: Water, Cyclohexasiloxane, Butyloctyl Salicylate, Propanediol, Propylheptyl Caprylate, Isododecane, Caprylyl Methicone, Polyglyceryl-3 Polydimethylsiloxyethyl Dimethicone, Methyl Methacrylate Crosspolymer, Methyl Trimethicone, Disteardimonium Hectorite, Magnesium Sulfate, Triethoxycaprylylsilane, 1,2-Hexanediol, Polyglyceryl-2 Dipolyhydroxystearate, Polymethylsilsesquioxane, Lauryl Polyglyceryl-3 Polydimethylsiloxyethyl Dimethicone, Butylene Glycol, Betula Platyphylla Japonica Juice, Glyceryl Caprylate, Caprylyl Glycol, Ethylhexylglycerin, Artemisia Annua Extract, Anthemis Nobilis Flower Oil, Sodium Hyaluronate, Pinus Sylvestris Leaf Oil, Glycerin, Nelumbo Nucifera Leaf Extract, Cryptomeria Japonica Leaf Extract, Saccharomyces Ferment Filtrate, Tocopherol, Glyceryl Glucoside, Hyaluronic Acid, Ascorbic Acid, Zinc Oxide.

Chemist's Notes:
Reviewed by April Basi, cosmetic chemist
Zinc oxide sitting at the very end of the ingredient list is actually correct for a physical sunscreen — it's an active ingredient listed separately from the base formula, not an indication of low concentration. The non-nano particle size matters here because nano zinc oxide can penetrate skin and raise safety concerns, while non-nano sits on the surface and physically reflects UV — a meaningful distinction for sensitive skin. One thing to note: despite the "fragrance-free" positioning, Anthemis Nobilis Flower Oil (Roman chamomile) and Pinus Sylvestris Leaf Oil are natural fragrant components, so if you're strictly fragrance-sensitive, patch test first.