Formulated for experienced acid users, The Strong Acid is our strongest liquid exfoliant, combining the power of alpha-, beta- and polyhydroxy acids (AHAs, BHA and PHA) into one powerful formula.
This next-generation acid toner works hard to smooth skin texture, banish dullness and reduce the appearance of fine lines and wrinkles. Glycoli
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77 ratings
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This Acid has oomph!
Having used the Gentle Acid since it came out I needed a bit more oomph and the Strong Acid certainly does that, I can feel it tingling when using it so really feel it is working. I havent had any rogue spots since using it.
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Nikki · October 26, 2026
The strong acid has stepped the toner game up a notch, which didn't feel possible with the gentle and control acids already standing head and shoulders above most. The SR acids overall are a staple in my skincare wardrobe.
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Winona · October 24, 2026
Brilliant.
A brilliant acid. Results speak for themselves. My skin feels great. Paired with the amplifier this gives a great tingle but no redness. Will buy again!