✨ A brightening antioxidant serum built around stabilized Magnesium Ascorbyl Phosphate — the pH-stable vitamin C ester that delivers tone-evening and free-radical defense without the irritation risk of free-acid L-Ascorbic Acid.
That formulation choice matters in practice. Sensitive, reactive, and post-procedure skin tolerates it where a conventional vitamin C wouldn't land, and it layers cleanly alongside peptides or retinoids — no conflict, no reformulation of the home-care stack. Sodium Hyaluronate at a functional concentration and Panthenol (Provitamin B5) round out the formula: genuine hydration, visible plumping of dehydration-related fine lines, and a calming effect on redness that makes it serviceable across dull, mature, hyperpigmented, and sensitized presentations alike.
For estheticians treating uneven tone, post-summer skin, or clients stepping up from basic hydration into a results-driven daily routine, this serum bridges the service table and the retail shelf in one appointment.
A natural fit for practices building brightening protocols around clients who need results without compromise.
Magnesium Ascorbyl Phosphate - known as Stabilized Vitamin C: A water-soluble, phosphorylated ester form of vitamin C that is significantly more stable than free ascorbic acid and does not require a low-pH vehicle to remain active. On the skin surface, it converts to ascorbic acid and functions as a potent antioxidant — neutralizing free radicals generated by UV exposure and environmental stressors. It also inhibits melanin formation by interfering with the tyrosinase enzyme pathway, visibly brightening uneven skin tone and reducing the appearance of dark spots. Compared to L-Ascorbic Acid, it is well tolerated by sensitive skin and suitable for use across all skin types, including reactive and post-procedure skin.
Sodium Hyaluronate - known as Hyaluronic Acid Salt: The sodium salt of hyaluronic acid, a naturally occurring humectant capable of drawing and retaining water at the skin surface. At the molecular weights typically used in topical serums, it forms a hydrating film on the outermost layers of the skin, improving suppleness and reducing the appearance of fine lines associated with dehydration. In this formula it occupies INCI position 4 — a formulation-relevant concentration — making it a functional hydration active rather than a trace label ingredient. Its presence directly supports the serum's positioning for dehydrated, sensitive, and mature skin types.
Panthenol - known as Provitamin B5: A stable precursor to pantothenic acid (vitamin B5) that is readily absorbed into the skin surface, where it converts to pantothenic acid and exerts humectant and conditioning effects. It attracts and binds moisture, improving skin flexibility and smoothness, while also helping to calm the appearance of redness and irritation. These properties make it especially valuable in formulas designed for sensitive, reactive, or compromised skin — and in post-procedure protocols where the skin barrier may need support. Its dual role as both a hydrating and soothing agent complements the vitamin C and hyaluronic acid actives in this formula.
- Cleanse the client's face thoroughly and pat dry.
- Dispense a small amount of serum onto fingertips.
- Apply evenly to the client's face and neck using gentle upward strokes, working from the center outward.
- Allow the serum to absorb fully before applying additional products.
- Use morning and evening as part of the daily skincare protocol.
- Instruct the client to avoid contact with the eye area during application.
Protocol fit and retail opportunity
This serum layers well after a toning step and before moisturizer or SPF in a professional facial protocol. Its pH-stable vitamin C form means it does not conflict with peptide-based or retinoid-based products the way free-acid L-Ascorbic Acid can — a useful selling point when building a multi-product home-care regimen for sensitive or mature clients.
The 15 mL retail size and 29 mL professional size allow for easy in-service demonstration and same-appointment retail conversion. For clients with hyperpigmentation concerns or dull, post-summer skin, introducing the serum during the facial service creates a natural transition into a daily brightening home-care routine.
Suplery is not affiliated with, endorsed by, or an authorized distributor of Circadia. Product information is provided for comparison purposes under nominative fair use.
