For years, soups and bone broths were synonymous with our grandmothers' kitchens, where they would be slow-cooked in pots for hours using cow bones, chicken feet, goat meat or fish. Today, however, this traditional practice has returned as a wellness trend, offering the promise of glowing skin, anti-ageing benefits and improved overall health.

Many people now drink bone broth in the hope of naturally boosting collagen production. But how much of this is backed by science?