[kaitai]

There are some probiotic blends that focus on lactobacillus that some have found helpful. These can be used externally or internally. See papers like https://www.sciencedirect.com/science/article/pii/S1198743X1... and https://www.ncbi.nlm.nih.gov/pubmed/24299970 for instance. If interested in this, check out the particular types of lactobacillus mentioned in these articles and make sure the product you're purchasing has those, rather than a general lacto blend. It appears that antibiotics should be a short course and probiotics a long course: killing is fast, growing is slower.

The science isn't conclusive but there are ~ zero negative side effects, so it's a good expected value.

[daed]

Yeah I’d neglected to mention that we’d tried some of that as well... but the only available probiotics matching the “correct” lactobacilli strains were in Europe... so we tried a few weeks of them but between their cost and not being certain they’d even survive the long journey to California we didn’t get many doses and as mentioned weren’t confident they’d be active on arrival.