- L-3,5,5
- L-377,202
- L-778,123
- L-alanosine
- L-arginine
- L-arginine / Korean ginseng / Gingko biloba / damiana-based supplement
- L-Asnase
- L-asparaginase
- L-Carnipure L-Carnitine L-Tartrate
- L-carnitine
- L-carnitine L-tartrate
- L-citrulline
- L-glutamic acid
- L-gossypol
- L-leucovorin
- L-leucyl-L-leucine methyl ester
- L-MTP-PE
- L-norgestrel
- L-threo-dihydrosphingosine
- lab-on-a-chip
- labial mucosa
- LaBID
- laboratory study
- laboratory test
- lacrimal gland
- lactase
- lactate dehydrogenase
- lactic acid
- lactic acid dehydrogenase
- lactobacillus
- Lactobacillus acidophilus probiotic
- lactobacillus fermented extract
- Lactobacillus rhamnosus GG
- lactoferrin
- lactose
- lactose intolerance
- laetrile
- LAK cell
- Lamictal
- lamina propria
- lamivudine
- lamotrigine
- Langerhans cell histiocytosis
- lanolin
- Lanoxin
- lanreotide acetate copolymer microparticles
- Lanreotide Autogel
- lanreotide long-acting aqueous gel
- Lantus
- laparoscope