A well-defined vitamin C serum with a credible gentle-brightening profile, but not a fragrance-free option. It is a stronger fit for users who want a softer vitamin C format and can tolerate citrus aroma ingredients than for very reactive or fragrance-avoidant skin.
Scored for skin — based on what its ingredients contribute.
What it may help with
Whether it can help visible signs of aging — fine lines, wrinkles, loss of firmness, or photoaging.
Whether it can help uneven tone, dark spots, melasma-like discoloration, or post-inflammatory hyperpigmentation — including brightening and tyrosinase-inhibiting ingredients.
Whether the ingredient helps increase the skin’s water content — humectants that attract water, ingredients that reduce water loss, or ones that make skin feel less dry.
From Simmondsia Chinensis (Jojoba) Seed Oil, Tocopheryl Acetate
Whether it can improve smoothness and surface texture — roughness, flaking, clogged pores, or unevenness. Exfoliating acids, retinoids, and smoothing moisturizers may score here.
From Tetrahexyldecyl Ascorbate, Simmondsia Chinensis (Jojoba) Seed Oil, Cyclohexasiloxane, Tocopheryl Acetate
Whether it can calm the skin — linked to less redness, irritation, discomfort, or visible reactivity.
From Simmondsia Chinensis (Jojoba) Seed Oil, Tetrahexyldecyl Ascorbate
Things to watch
Whether it can make skin more sensitive to sunlight, raising the risk of sunburn or UV-related irritation. Relevant for some exfoliating acids, retinoids, and certain plant-derived ingredients.
Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.
Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.
Whether it may worsen breakouts — clogging pores, feeling heavy on acne-prone skin, or triggering comedones in some users.
From Tocopheryl Acetate
Whether it has meaningful potential to be absorbed into the body at levels that may matter biologically. Most cosmetic ingredients score low unless there is known concern or high exposure.
NEUTRAL · 3
CAUTION · 5
An oil-based vitamin C serum from Medik8, identified by manufacturer pages as C-Tetra with 7% tetrahexyldecyl ascorbate. The formula looks effective for gentle brightening and antioxidant support, but it also includes citrus oil and multiple fragrance allergens, so sensitivity is a real consideration. Evidence came from Medik8 product pages and the full ingredient list on the brand site.
Summarised from public reviews across the web — subjective experience, not our formula assessment.
Users commonly describe the serum as gentle, cosmetically elegant, and effective for glow, while some report citrus scent sensitivity or irritation from the fragrance components.
Aggregated from publicly available reviews. SpottyLabs does not sell this product.
Spotty Labs
