Do any of these contain caffeine?
Yes — yerba maté and guarana do naturally. The rest of the range does not. Amounts are given on the product pages.
Is the range organic?
Much of it is certified organic, and the certification is shown on the individual product page.
Can I take these alongside medication?
Check with your GP or pharmacist first. Botanicals can interact with prescribed medicines, and this is particularly worth doing if you take anything long term.
Capsules or tea — which should I choose?
Capsules give a consistent measured amount and are quicker. Teas are gentler and let you vary the strength. It is preference rather than one being better.