The global trading order is increasingly bending to Donald Trump’s will. His latest round of tariffs punishes countries that he sees as unfairly cheating America; meanwhile others have scrambled to make deals. It is tempting to think that America is winning from all this, but our leader argues that is deeply misguided.

Our latest Well Informed column looks at collagen supplements. Do they really deliver stronger joints and shinier hair? Your body naturally creates the protein, but age, sun and excess booze seem to slow its production. We propose a few alternatives that might be more effective.