How to dilute vinegar for fighting lice, what ratios? - briefly
Mix one part apple‑cider vinegar with three to four parts water (approximately a 1:3–1:4 ratio) and apply the solution to the scalp, allowing it to sit for 10–15 minutes before rinsing. This dilution reduces irritation while maintaining sufficient acidity to help loosen louse eggs.
How to dilute vinegar for fighting lice, what ratios? - in detail
Vinegar, typically white distilled or apple cider, can be used as a topical agent against head lice when mixed with water to reduce its acidity and prevent scalp irritation. The effectiveness of the solution depends on the concentration, contact time, and thoroughness of application.
A practical dilution range is 1 part vinegar to 3–4 parts water (approximately 20–25 % vinegar by volume). This ratio maintains enough acetic acid to dissolve the glue that holds nits to hair shafts while remaining gentle enough for most skin types. For sensitive scalps, a milder mixture of 1 part vinegar to 5 parts water (≈15 % vinegar) may be used, though the lice‑killing effect could be slightly reduced.
Recommended preparation steps
- Measure the vinegar and water with a clean container.
- Combine the liquids, stirring gently to ensure uniform distribution.
- Transfer the solution to a spray bottle or a cup for easy application.
Application protocol
- Saturate dry hair and scalp with the diluted mixture, ensuring every strand is coated.
- Cover the hair with a plastic shower cap or cling film for 30 minutes; the occlusion enhances penetration of the acid.
- Rinse thoroughly with lukewarm water, then wash with a regular shampoo to remove residue.
- Repeat the treatment after 7–10 days to target any newly hatched lice.
Safety considerations
- Perform a patch test on a small skin area 24 hours before full application to detect possible irritation.
- Avoid use on broken skin, open wounds, or in children under 6 months; pediatric use should be supervised by a healthcare professional.
- Store the prepared solution in a labeled, sealed container for up to two weeks; discard after this period to prevent bacterial growth.
Additional tips