The best replacement for fasting is starvation.

The best alternatives to fasting are rated as following:
★★★★★  starvation
★★★★  non fasting cholesterol
★★★★  starving
★★★★  juice fasting
★★★★  water fasting
★★★★  dieting
★★★  nonfasting cholesterol
★★  abstinence
★★  npo
★★  cleansing
★★  nonfasting
★★  anorexia
★  non fasting
★  starvation mode
★  feasting
★  non fasting glucose
★  consecration
★  calorie restriction
  6 meals
  cleanse
  sawm
  lent
  ketogenic diet
  saum
  master cleanse

Your alternative for fasting is not listed? Suggest!
Speaking about fasting, one probably shouldn't forget about prayer.

Other search terms related to fasting and their ratings are:
★★★★★ prayer
★★★★ losing muscle
★ enema
muscle loss
prayer is just a diet
You have in mind a companion for fasting and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of fasting in all years. Click on graph for more.
fasting
starvation
non fasting cholesterol