Generations of people across the world have infused all manner of herbs, fruits, roots and leaves in hot water as a healthy drink, with the medicinal properties well-reputed and validated locally, even if not scientifically proven by the powers that be.
Not much has changed really, except in accessibility. Now in the twenty first century, a Frenchmen can sip on a tisane with guarana, a South American herb reputed to support mental performance, whilst a Chinese youngster can relax with a soothing bedtime cup of Chamomile from Egypt.
The breadth of the infusion and herbal tea market is now vast.
Keep discovering.