Homemade Oral Rehydration Solution (経口補水液)

Base (500ml)

• Water: 500ml
• Sugar: 20g
• Salt: 1.5g

Mix until fully dissolved. Make fresh, drink same day.

Variations

Lemon or lime juice

• Lemon or lime juice: 15ml (大さじ1)
• Sugar: 20g (unchanged)
• Salt: 1.5g (unchanged)

Honey (replaces sugar — do not add on top)

• Honey: 24g (~17ml)
• Salt: 1.5g
• Omit the white sugar entirely

Orange juice (100% juice)

• Orange juice: 30ml (大さじ2)
• Sugar: 17g (reduced from 20g)
• Salt: 1.5g
• Water: 470ml (reduced to hold total volume at 500ml)

Apple juice (100% juice)

• Apple juice: 30ml (大さじ2)
• Sugar: 16.5g (reduced from 20g)
• Salt: 1.5g
• Water: 470ml (reduced to hold total volume at 500ml)

Umeboshi (crushed, traditional salt-cured, ~8g/1 piece)

• Umeboshi: 1 piece, crushed
• Sugar: 20g (unchanged)
• Salt: omit — the umeboshi supplies ~1.5g on its own
• Water: 500ml

If using a mild/honey-pickled umeboshi instead: add back ~0.9g salt, and check the label for added sugar.

Notes

• A ripe banana (~420mg potassium) alongside this solution reasonably covers the potassium gap.