Hi @markwhittles - it’s really interesting you say so! I was just reading a similar conversation in another thread (linking it for you here) where Pamela, our in-house medical herbalist provided a really helpful explanation of why this could be.
Each formulation is actually the exact same dosage of valerian, with the only difference being a flavour change - but as you’ll find she mentions - there are a range of things that could be impacting your sleep, causing a different reaction between each of the plant pods. Sometimes, something as minor as a flavour association even does it. (e.g. mint before bed like brushing your teeth).