Ursa Major Brighten Up Vitamin C Serum, 1 fl oz

A brightening serum built around two stable forms of vitamin C that stay potent from the first use to the last drop — unlike traditional L-Ascorbic Acid, which oxidizes quickly and can irritate at the concentrations needed to be effective. Lightweight, oil-serum texture that absorbs quickly and works as a standalone layer or under moisturizer. Natural rose and citrus scent from real plant oils — not synthetic fragrance.

Why people use it

• Visibly brightens dull skin and reduces the appearance of dark spots and uneven tone with consistent daily use
• Two stable vitamin C forms stay potent throughout the bottle's life — most vitamin C serums oxidize before you finish them; these don't
• Gentle enough for sensitive skin — no pH-lowering acids, no tingling, no peeling, no photosensitivity concern
• Works morning and night — unlike L-Ascorbic Acid formulas, this doesn't require strict AM-only use
• Lightweight featherweight texture works alone for oily/combination skin, or layered under moisturizer for dry skin

A note on vitamin C forms. Traditional L-Ascorbic Acid is the most clinically studied form of topical vitamin C, but it requires a pH below 3.5 (which can cause irritation), oxidizes rapidly, and can destabilize during shipping and storage. This serum uses Tetrahexyldecyl Ascorbate (an oil-soluble, pH-independent form that stays stable and penetrates without irritation) and Ascorbyl Glucoside (a water-soluble form that converts to ascorbic acid on the skin). The trade-off: gentler and more stable than high-percentage L-Ascorbic Acid formulas, with a milder brightening curve. Appropriate for people who've experienced irritation from traditional vitamin C serums.

What's inside

• Helianthus Annuus (Sunflower) Seed Oil — the oil-first base; a lightweight, non-comedogenic emollient high in linoleic acid; provides the featherweight texture while delivering the oil-soluble vitamin C form to the skin
• Tetrahexyldecyl Ascorbate — a highly stable, oil-soluble vitamin C ester; pH-independent (no irritation), well-absorbed through the skin's lipid barrier, strong antioxidant and brightening activity
• Ascorbyl Glucoside — a water-soluble vitamin C derivative that converts to active ascorbic acid on the skin; adds a second vitamin C pathway alongside the oil-soluble form
• Populus Tremuloides (Aspen) Bark Extract — a natural source of salicin and polyphenols; supports gentle skin texture refinement and antioxidant protection
• Rosa Canina (Rosehip) Seed Extract — naturally rich in Vitamin A precursors (beta-carotene), Vitamin C, and linoleic acid; supports the appearance of a more even skin tone
• Leontopodium Alpinum (Edelweiss) Meristem Cell Culture — the same alpine plant stem cell extract found in other Ursa Major formulas; potent antioxidant support against environmental stressors
• Bisabolol — a calming compound from chamomile; helps reduce visible redness
• Rosa Damascena (Rose) Flower Oil + Citrus Aurantium Dulcis (Orange) Peel Oil — two organic essential oils that are the source of the fresh rose-citrus scent; natural, not synthetic, but present enough that fragrance-sensitive skin should patch test

Good to know

• 1 fl oz / 30ml pump bottle
• Apply 1-2 pumps to clean, dry skin before moisturizer; use morning and/or night
• Pairs naturally with SPF in the morning — the vitamin C antioxidants work synergistically with UV protection
• Natural scent from rose and orange essential oils — not fragrance-free; patch test if highly fragrance-sensitive; contains Limonene (from orange peel)
• Does not cause photosensitivity — unlike some L-Ascorbic Acid formulas, this is safe for use before sun exposure when paired with SPF
• B Corp certified, Plastic Negative, paraben-free, silicone-free, sulfate-free, cruelty-free, vegan

Full ingredient list Helianthus Annuus (Sunflower) Seed Oil*, Glycerin, Tetrahexyldecyl Ascorbate, Populus Tremuloides (Aspen) Bark Extract, Ascorbyl Glucoside, Coco-Glucoside, Coconut Alcohol, Butyrospermum Parkii (Shea) Butter*, Aloe Barbadensis (Aloe Vera) Leaf Juice Powder*, Rosa Canina (Rosehip) Seed Extract*, Leontopodium Alpinum (Edelweiss) Meristem Cell Culture, Hydrogenated Lecithin, Rosa Damascena (Rose) Flower Oil*, Citrus Aurantium Dulcis (Orange) Peel Oil*, Rosmarinus Officinalis (Rosemary) Leaf Extract*, Bisabolol*, Sodium Anisate, Glyceryl Caprylate, Sclerotium Gum, Xanthan Gum, Arginine (*Certified Organic)