The best replacement for lipids is carbohydrates.

The best alternatives to lipids are rated as following:
★★★★★  carbohydrates
★★★  proteins
★★★  fats
★★  fatty acids
★  cholesterol
★  unsaturated lipids
  carbohydrates store more energy
  phospholipids
  bad lipids
  carbs
  polysaccharides
  lipoproteins
  nucleic acids
  low density lipids
  triglycerides

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

Other search terms related to lipids and their ratings are:
★★★★★ tpn
★ sudan iv
nmr
You have in mind a companion for lipids and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of lipids in all years. Click on graph for more.
lipids
carbohydrates
proteins