Not directly answering your question but if you're looking to increase your gut microbiome diversity then look to all the fermented (non-alcoholic) drinks and foods - Kombucha, kefir, kimchi, sauerkraut, proper sourdough (ideally stoneground wholemeal, definitely not supermarket stuff). Eating mostly whole [plant] foods has been shown to help with this too.
Sorry to everyone else, if I wasn't clear. It needs to not be anything like yogurt, milk or cream in terms of consistency or taste. Like the way an apple is not like custard. My OH doesn't like creamy things.
Not directly answering your question but if you're looking to increase your gut microbiome diversity then look to all the fermented (non-alcoholic) drinks and foods - Kombucha, kefir, kimchi, sauerkraut, proper sourdough (ideally stoneground wholemeal, definitely not supermarket stuff). Eating mostly whole [plant] foods has been shown to help with this too.