SUNNYSIDE 15% Vitamin C Brightening Day Serum

Name: Sunnyside 15% Vitamin C Brightening Day Serum
Brand: IDF
SKU: HFG1010
Price: 79.00 USD
Availability: InStock

The situation: Uneven.

active-tolerant skin · hyperpigmentation · dull skin | seasonal shift · dry & dehydrated · fine lines & wrinkles

15% Vitamin C that stays stable long enough to actually work.

$79.00

Free shipping on orders $75+

Most Vitamin C serums oxidize before they reach their potential. Sunnyside uses two oil-soluble, highly stable derivatives — Tetrahexyldecyl Ascorbate and 3-O-Ethyl-L-Ascorbic Acid — at a combined 15% concentration, formulated to stay potent from first pump to last. Visibly improves the appearance of dark spots and uneven skin tone.

What it feels like

Balanced serum consistency — not runny, not heavy. Presses smoothly into skin. Leaves skin feeling hydrated, soft, and visibly luminous within minutes.

Top benefits

— 15% stable Vitamin C (Tetrahexyldecyl Ascorbate + 3-O-Ethyl-L-Ascorbic Acid) visibly improve the appearance of dark spots, loss of firmness, and free radical damage
— 3% Tranexamic Acid visibly improve the appearance of dark spots and uneven pigmentation
— 2% Niacinamide minimize the appearance of pores, oiliness, and visible irritability
— 2% MossCellTec improve skin resilience and moisture retention

Aloe Barbadensis Leaf Juice, 3-O-Ethyl Ascorbic Acid, Caprylic/Capric Triglyceride, Simmondsia Chinensis (Jojoba) Seed Oil, Tetrahexyldecyl Ascorbate, Tranexamic Acid, Caprylyl Caprylate/Caprate, Glycerin, Niacinamide, Isomalt, Vitis Vinifera (Grape) Seed Oil, Glyceryl Stearate, Cetearyl Glucoside, Glutathione, Tremella Fuciformis Sporocarp Extract, Inonotus Obliquus (Mushroom) Extract, Sodium PCA, Tocopherol, Water (Aqua) (Eau), Citric Acid, Cetyl Alcohol, Phytol, Benzyl Alcohol, Hydroxyethylcellulose, Dehydroacetic Acid, Benzoic Acid, Sorbic Acid, Maltodextrin, Disodium Phosphate, Polysorbate 60, Sodium Phosphate

AM: On clean, dry skin, gently press 1–2 pumps onto face, neck, and chest, avoiding the eye area. Allow to absorb before the next step.

AM Routine: Utopia → Galilee → Sunnyside → Owel → Grand → SPF

Note on pump residue: A small amount may dry in the nozzle between uses. Dispense gently for the first pump of each session.

Pore Confession: Sunnyside is your AM active. Moonbeam is your PM active. They work the same skin renewal pathway from opposite directions — Vitamin C protecting and brightening by day, retinaldehyde renewing overnight. Use both consistently for compounded results.

Skin appears more luminous and hydrated immediately after application.

A good skincare routine requires dedication (that's on you) – With consistent use, complexion appears visibly brighter and more even.

Build Your Skin Strategy

Sunnyside is your AM active. Moonbeam is your PM active. Together they cover the full 24-hour renewal cycle. In the AM, Sunnyside sits after Galilee to amplify antioxidant defense before Vitamin C is applied.

MOONBEAM

Retinaldehyde Age-Defying Serum

Age-Defying Retinaldehyde Night Serum

$79.00

GALILEE

Antioxidant Dewy Drop

Hydrating Hyaluronic Acid + Antioxidant Dewy Drop Serum

$54.00

Fragrance Free

Cruelty Free

Nourishing

Non Drying

Non-Foaming

Sunnyside 15% Vitamin C Brightening Day Serum

$79.00

Understanding Vitamin C Derivatives

Despite traditional Vitamin C's (aka Ascorbic Acid) notorious instability in cosmetic formulations, derivatives like Tetrahexyldecyl Ascorbate and 3-O-Ethyl-L-Ascorbic Acid rise above to deliver maximum results without the shortened shelf life or oxidative risks. These oil-soluble derivatives don't just boast enhanced stability to preserve their efficacy, their superior skin penetration capabilities optimize the absorption and delivery of vitamin C's high-performance benefits like brightening, antioxidant defense, and the stimulation of collagen synthesis while remaining gentle enough for sensitive skin types.

Our key ingredients

15% Vitamin C Combo

(Tetrahexyldecyl Ascorbate + 3-O-Ethyl-L-Ascorbic Acid): Two highly stable, oil-soluble Vitamin C forms chosen for penetration depth and oxidative stability. Target dark spots, sagging, and free radical-related skin damage.
3% Tranexamic Acid

Visibly improve the appearance of dark spots and UV-induced pigmentation.
2% Niacinamide

Vitamin B3 that helps diminish the look of enlarged pores, excess oiliness, and visible irritability.
2% MossCellTec

Active extracted from biotechnologically-produced moss. Improves skin resilience, moisture retention, and antioxidant defense.