How do BHAs differ from AHAs?

Solubility and action zone. AHAs water-soluble, work at the surface: texture, pigmentation. BHAs oil-soluble, penetrate the pore: acne, blackheads. On combination skin combinable in alternating nights.

Which BHA is best: salicylic acid or LHA?

Depends on tolerance. Salicylic acid faster and more studied but more irritating on sensitive skin. LHA slower, better tolerated, comparable long-term efficacy on comedonal acne. On reactive skin: LHA or combined formulas.

How long does a BHA take to work?

Shine and pores: 1-2 weeks. Blackheads and comedones: 4-6 weeks. Inflammatory acne: 6-12 weeks. Daily consistency matters more than concentration.

Can a BHA be used every day?

Yes, at low concentrations (0.5-2%). Cleansers and toners at 1-2% usually tolerated daily. If tightness appears, space to three times a week and reinforce hydration.

Can a BHA be combined with retinol or niacinamide?

With niacinamide: documented synergistic combination for acne and pores. With retinol: alternating nights to limit irritation. BHA one night + retinol the next works in acne-prone skin with anti-ageing goal.

Can BHAs be used during pregnancy?

Topical salicylic acid at low cosmetic concentrations (≤2%) generally acceptable, check with your gynaecologist particularly on large areas. Peel-grade not recommended. Alternatives: azelaic acid and niacinamide.

BHAs | Salicylic acid and LHA | Farma2Go

Beta-Hydroxy Acids (BHAs)

Pharmacy serums, toners, cleansers and treatments with beta-hydroxy acids (BHAs). A family of oil-soluble acids that penetrate inside the pore and dissolve excess sebum and hardened keratin. The group includes salicylic acid (the most studied), LHA (lipohydroxy acid, a gentler derivative) and capryloyl salicylic acid. Reference actives for acne, blackheads, combination-to-oily skin and enlarged pores.