A brand linked to a mainland beauty blogger’s social media account has been exposed for making false claims about the “anti-ageing” ingredients in one of its products, prompting the blogger to offer a huge refund.

Rooibos tea and the sweetener stevia were originally discovered by indigenous peoples. Now they are among a long list of biological resources that bring profit to international corporations. Biopiracy, or scientific colonialism, is the term for when big c...