Fujin Tea is a specific item of Foods in the world of Elite Dangerous. Rare goods increase in value the further you travel from their point of purchase.
A range of infusions from indigenous plants and herbs that produce highly effective medicines rivalling or exceeding the best synthetics. Ill-informed combinations have been known to be instantly fatal.
— In-game description
You must provide 50 units of Fujin Tea to gain access to Broo Tarquin's services.
All the supply can be bought, provided you have enough cargo space. As usual, rare goods are limited, therefore supplies are low, ranging from 60 to 120, average.