How will weight-loss jabs change the food industry?

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Consumers are surrounded by food that is highly conducive to weight gain. No one likes dieting and very few have lasting success. But now weight-loss injections are seen as gamechangers, yielding results that seem miraculous for people who have struggled with their weight.

Around the world, obesity, high blood pressure, and abnormal blood sugar and lipid levels (so-called “metabolic syndrome”) have now been shown to affect 31% of women and 26% of men. The same...