The best replacement for lemon juice is lime juice.

The best alternatives to lemon juice are rated as following:
★★★★★  lime juice
★★★★  lemon extract
★★★★  vinegar
★★★  apple cider vinegar
★★  lemon
★★  lemon zest
★  sun in
★  orange juice
★  vinegar more acidic
★  real lemon
★  fresh lemon
★  lemon juice concentrate
★  lemons
★  acv
★  lemon oil
★  fresh lemon juice
★  fresh
  vinegar ph
  fresh lemons
  vitamin c serum
  citric acid
  squeezed lemon
  bottled lemon juice
  fruit fresh
  lemon peel
  lemon concentrate
  coke more acidic

Your alternative for lemon juice is not listed? Suggest!
Speaking about lemon juice, one probably shouldn't forget about water.

Other search terms related to lemon juice and their ratings are:

★★★★★ water
★★ baking soda
★★ warm water
★★ shrooms
cayenne pepper
hot water
water benefits
olive oil
lemon extract
honey and hot water
apple cider vinegar
warm water benefits
You have in mind a companion for lemon juice and it is not yet here? Propose!

Google Trends

Scale is based on the average worldwide traffic of lemon juice in all years. Click on graph for more.
lemon juice
lime juice
lemon extract