Ultra-C Serum

AOS Skincare Ultra-C Serum is a brightening vitamin C treatment formulated to improve the appearance of dark spots, hyperpigmentation, uneven skin tone, and visible signs of sun damage. Featuring 10% stabilized tetrahexyldecyl ascorbate, Herbalbright Complex™, kojic acid, vitamin E, and a prebiotic lemon peel bioferment, this lightweight facial serum helps brighten, smooth, and rejuvenate the complexion while supporting a healthy-looking skin barrier.

Step 4: Treat

Benefits

Brightens the appearance of hyperpigmentation and sun spots, helps improve uneven skin tone, supports collagen production, gently exfoliates to smooth rough-looking skin, reduces the appearance of fine lines and wrinkles, and provides antioxidant protection against environmental stressors. Prebiotic lemon peel bioferment helps support a healthy-looking skin microbiome. Balanced at a pH of 5.4 to support the skin’s natural barrier function.

Ideal For

Skin types 3, 4, 5, and 8, as well as skin experiencing dark spots, hyperpigmentation, uneven tone, dullness, rough texture, or visible signs of environmental damage.

How to Use

Shake well before use. Massage 2–3 drops into the face, neck, chest, and backs of hands, or anywhere you want to target visible sun damage. Use once daily, morning or evening, as your first leave-on skincare product. Follow with your favorite moisturizer.

Key Ingredients

10% Tetrahexyldecyl Ascorbate is a stable, oil-soluble form of vitamin C that helps brighten the appearance of skin tone and support a more even-looking complexion. Herbalbright Complex™ combines antioxidant-rich botanicals including Japanese knotweed, licorice, and lemon peel bioferment to help improve the appearance of sun-damaged and uneven-looking skin. Kojic Acid helps gently exfoliate and brighten the appearance of uneven skin tone. Bearberry (Uva ursi) is rich in antioxidants and naturally occurring arbutin, helping improve the appearance of dark spots and dull skin. Lemon Peel Bioferment is a prebiotic ingredient that supports a healthy-looking skin microbiome while helping brighten the appearance of darker spots and dullness. Vitamin E provides antioxidant and conditioning benefits.

Ingredients

Aloe vera gel*, goji berry extract*, tetrahexyldecyl ascorbate 10% (Vitamin C), elderberry fruit extract*, Herbalbright Complex™ (extracts of mallow*, peppermint*, cowslip*, lady’s mantle*, speedwell*, lemon balm*, yarrow*, helichrysum* and bearberry fruit (uva ursi)), rosehip seed oil, evening primrose oil*, kojic acid, vitamin E oil (wheat-free mixed tocopherols), lactobacillus/lemon peel bioferment, ylang ylang essential oil, xanthan gum, essential oils of Roman chamomile*, bergamot, Oregon lavender* and Immortelle (helichrysum)*.

*Certified Organic

Product Details

Ultra-C Serum has a smoother texture and improved stability while maintaining its brightening benefits. Color variations are normal in AOS Skincare’s small-batch products, so the serum may appear slightly lighter or darker than pictured.

Handcrafted in Bend, Oregon.