I also found reports linking gelatin with appetite suppression, but not to glycine per se. Glycine is, however, reported to curb cravings for sugar. Japanese scientists have been on the forefront of glycine research, and have discovered that glycine is very useful for those individuals who have trouble staying asleep.
Three strategies that will help you find the main idea are to 1) look for general versus specific ideas; 2) use the topic (the general subject of a section) to lead you to the main idea; 3) use key wordsâverbal clues that lead you to a main idea.
1. Take a quick overview of the article by reading  the title  the abstract  the introduction  the subheadings  the conclusion 2. Read the article without taking notes in order to gain an overall idea of its aim and main idea. 3. Read the article again analytically and make notes of main ideas and main topic.  Highlight important ideas.  Make brief notes in the margin or on paper.