
A3 Lemon Lightening Serum for Hair Brightening & Sun-Kissed Highlights 50ml/1.69 oz
The 50ml bottle, which is the size to buy once you know the serum works on your hair rather than the size to start with.
A3's lemon serum is a gradual brightener. Real lemon extract, applied and left in, lifting warmth into blonde, light brown and naturally fair hair over repeated use rather than in one dramatic session. The gradual part is the safeguard, since you can look at your hair each week and stop when the tone is right. That is not an option with a box lightener. Where it earns its place is on grown-out highlights: roots aside, the mid-lengths and ends of highlighted hair go dull and slightly muddy after a few months, and a brightening serum refreshes them without another salon appointment.
Hair is left soft and shiny rather than dry, which is the difference between a formulated serum and the lemon-juice-and-sunshine version. Use it on the lengths, keep it off the scalp, and give it time.
Aqua (Water), Glycerin, Citrus Limon (Lemon) Fruit Extract, Chamomilla Recutita (Matricaria) Flower Extract, Panthenol, Hydrolyzed Wheat Protein, Citric Acid, PEG-40 Hydrogenated Castor Oil, Fragrance (Parfum), Benzyl Alcohol, Dehydroacetic Acid, Limonene, Citral
- 24-hour delivery
- Every brand we carry ships within 24 hours, not just the hero lines. Order before 2pm and it leaves the same working day.
- Free over £40
- UK delivery is free on orders over £40. Below that it is a flat rate, shown at checkout before you pay.
- Tracking
- You get a tracking link by email the moment it is picked up.
- 30 days
- Send anything unopened back within 30 days for a full refund. No explanation needed.
- Opened it and it is wrong for your hair?
- Tell us what happened. Curl products are hard to judge from a photo, and we would rather swap it than have you stuck with it.
- We price match
- Find it cheaper somewhere else and we will match the price.
Application tips
A weekly session beats a daily one.
Split the hair into four, apply through the lengths of each and leave it in rather than rinsing it out. Avoid the scalp and the root area. Check the tone in daylight the following day, then wait a week before the next round, which is long enough to judge whether you want another shade off it.
Results
Faded highlights come back up. The greyish cast that light hair picks up after a few months clears, and the mid-lengths look closer to the day they were done. Blonde reads brighter and less yellow; light brown warms up. Shine improves alongside it because the hair is left conditioned rather than roughed up.
Composition
- Lemon Extract
- Brightens light and mid tones gradually, a shade at a time
Full ingredients list
Aqua (Water), Glycerin, Citrus Limon (Lemon) Fruit Extract, Chamomilla Recutita (Matricaria) Flower Extract, Panthenol, Hydrolyzed Wheat Protein, Citric Acid, PEG-40 Hydrogenated Castor Oil, Fragrance (Parfum), Benzyl Alcohol, Dehydroacetic Acid, Limonene, Citral