In its 2016 Consumer Survey on Dietary Supplements, the Washington, D.C.-based Council for Responsible Nutrition (CRN) found that nearly one fifth of supplement users in the United States take them for skin, hair and nail benefits.

Medi-beauty – Products which tread the fine line between prescription drugs and beauty – is currently valued at £72m in the UK, growing by a healthy 18% year on year (source: IRI). It is forecast to double in value over the next few years.

Nutricosmetics — Digestible nutrients designed to enhance the appearance of hair, skin and nails – are big business. The global market for nutricosmetics, valued at $3.36 billion in 2013 is “projected to reach $7.4 billion by 2020 (source: Global Industry Analysts Inc.)