Catalyst brings a mixture of Australian and international stories, from scientific breakthroughs investigating the implications, the ethics, and the politics of the particular issue, to stories about how scientists work in the field.

In this DVD release, the Catalyst team present stories on Weight Management: A weighty issue; The Atkins Diet Part 1 & 2; Exercise pill; Comfort food; Exercise overdose; Low GI diet; Fat and Fit; Dietary supplements; Mediterranean diet; Dr. Norman Swans Cholesterol check; Food coma; and The future of GM foods.