Some products are defined by their hero ingredient; this toner is unfortunately defined by its fragrance. Lagom's Cellus Mist Toner is a perfectly pleasant lightweight hydrator, but the most important thing to know about it is the citrus essential-oil blend it's built around — because that's the part that should shape whether and how you use it.
Start with the citrus oils, since they're the defining feature. The toner contains bergamot, lemon, mandarin and sweet orange peel oils, plus lemongrass. Cold-pressed citrus peel oils — bergamot most notoriously — can contain furanocoumarins, compounds that react with UV light on the skin to cause phototoxic reactions: redness, darkening, sometimes burn-like marks on sun-exposed skin. That's a specific, well-documented risk, and it's why dermatologists are wary of citrus essential oils in leave-on daytime products. There are mitigating factors — some cosmetic-grade citrus oils are processed to reduce furanocoumarins, the levels here may be modest, and diligent sunscreen reduces the risk — so it isn't a guaranteed problem for everyone. But it's an avoidable one, and a toner whose main feature is a blend of citrus peel oils is genuinely hard to recommend over a fragrance-free hydrator, particularly for daytime use or for sun-exposed, reactive skin.
The hydration itself is fine but ordinary. The base is a simple humectant blend — hydroxyethyl urea, butylene glycol, propanediol — with panthenol to soothe and green tea (callus culture and leaf extract) for light antioxidant character. It draws in water and leaves a fresh, lightly hydrated feel as a first layer. There's nothing wrong with it, but there's nothing special either: no brightening, anti-aging or barrier treatment, just basic hydration. So you're choosing this toner for the feel and the scent, not for actives.
That combination — simple hydration plus a prominent, photosensitivity-prone citrus fragrance — is what holds it back. It's a poor fit for sensitive, reactive or rosacea-prone skin, which the citrus oils can irritate, and an awkward one for anyone who'd use a toner in the morning. It's also not fungal-acne safe, owing to the citrus and lemongrass oils, though it's vegan in composition.
The practical way to use it, if you do, is at night only, so the citrus oils aren't on your skin in daylight, and always with diligent sunscreen by day regardless. For normal-to-oily skin that simply likes a light, citrus-scented hydrating mist and uses it sensibly, it's serviceable; for everyone else, a fragrance-free hydrating toner does the same hydrating job without the caveat.
In use, it's a light, watery toner that absorbs quickly and smells brightly of citrus, leaving skin fresh and lightly hydrated. The experience is pleasant; the concern is what the scent is made of.
The brand context is Lagom's Cellus hydrating line, and the complete INCI confirms a simple hydrating toner whose defining and limiting feature is the citrus essential-oil blend.
The practical way to handle it, if you choose it, is to keep it to nighttime and never skip daytime sunscreen, because the citrus peel oils are the crux of the matter. Bergamot, lemon and orange oils can carry furanocoumarins that react with UV to cause phototoxic marks, so a toner built around them is simply a poor fit for daytime use, however pleasant the scent. At night the risk is moot, and the hydration — humectants, panthenol and green tea — is perfectly nice, if unremarkable. But that's the deeper point: the hydration here is ordinary, the kind any simple toner provides, while the citrus fragrance adds risk without adding benefit, so for most people a fragrance-free hydrating toner is the smarter, lower-stakes choice that does the same job. Reserve this for resilient, fragrance-loving skin that wants a citrus-scented hydrating layer and is disciplined about SPF. Sensitive, reactive or rosacea-prone skin should avoid it outright, since the citrus-and-lemongrass blend is exactly the kind of fragrance that irritates the skin a hydrating toner is meant to comfort. Judged honestly, it's a fine-feeling but easily-bettered hydrator whose defining citrus scent is also its main liability. For most people, a fragrance-free hydrating toner does the same hydrating job without the citrus-oil liability, which is the honest recommendation here.
The bottom line: a basic, pleasant hydrating mist-toner that's let down by a citrus essential-oil blend carrying photosensitivity concerns — fine for non-sensitive skin that likes the scent and uses it at night with daytime SPF, but hard to recommend over a fragrance-free hydrator for most people. Buy it only if you specifically want a light, citrus-scented hydrating toner and your skin is resilient. Skip it if your skin is sensitive or reactive, if you'd use a toner by day (the citrus oils are a phototoxicity risk), if you want a fragrance-free toner or treatment actives, or if you're managing fungal acne. The hydration is ordinary and the fragrance is the reason for caution.