Robuta

https://www.tastingtable.com/2032702/caffeine-content-types-tea/
Nov 27, 2025 - The tea with the least amount of caffeine is rooibos, followed by decaf tea that has a small amount. Matcha green tea and black tea have the most.
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https://pubmed.ncbi.nlm.nih.gov/37444212/
Caffeine is a natural psychoactive substance that belongs to a group of chemical compounds called purine alkaloids. Caffeine is found in various plants such as...
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https://www.highcaffeinecontent.com/
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https://pubmed.ncbi.nlm.nih.gov/17132260/
Caffeine is the most widely consumed drug in the world with coffee representing a major source of intake. Despite widespread availability, various medical...
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