- You have no items in your shopping cart
- Continue Shopping
Direct Answer
Toothpaste, lemon juice, and baking soda are three of the most common acne hacks, and all three can genuinely damage skin. Your skin’s natural pH is around 5.5. Toothpaste and baking soda sit far above that, and lemon juice sits far below it. Both directions strip or disrupt the acid mantle that’s supposed to be protecting you, which is the opposite of what a breakout needs.
These remedies persist because they’re cheap, already in your bathroom, and sometimes seem to work in the short term. That short-term effect is usually the problem itself, not evidence they’re helping.
Why the pH mismatch actually matters
Baking soda has a pH around 9. Lemon juice sits around 2. Your skin’s acid mantle needs to stay close to 5.5 to function properly and keep acne-causing bacteria in check. Push it too far in either direction and the barrier gets disrupted, oil production often increases in response, and skin becomes more vulnerable, not less.
What each one actually does
Toothpaste contains fluoride, baking soda, and sodium lauryl sulfate, ingredients built for teeth, not skin. It can dry out a pimple temporarily, but often leaves a red, irritated patch behind and does nothing for the oil, dead skin, or bacteria actually causing the breakout. Lemon juice is acidic enough to cause real chemical irritation, and it’s phototoxic: applying it before sun exposure, which in Malaysia is basically all day, can make resulting dark marks significantly worse. Baking soda’s high pH strips protective oils and can trigger rebound oil production as skin tries to compensate.
The other habit worth naming here
Squeezing or popping a pimple belongs on this list too, though it deserves its own full explanation elsewhere. The short version: it pushes bacteria and inflammation deeper rather than out, raising the risk of scarring. (The American Academy of Dermatology has a clear position on this: see their guide to acne treatment and skin care.)
What to actually reach for instead
Salicylic acid and benzoyl peroxide are formulated specifically for acne, at concentrations and pH levels that work with skin instead of against it. They’re not more expensive than raiding your kitchen cabinet, and they’re built to address what’s actually causing the breakout rather than just drying out what’s already visible.
Tired of trial and error with your acne?
Book a 60-minute consultation with Ken — RM30, a real diagnosis, no pitch.
