If this were me I would take thyroid meds first and wait at least 20 minutes, preferably a bit longer before taking Symprove.
Technically the probiotics should indirectly help thyroid med absorption but it is Symproves fillers that you need to be weary of. As a Hashi sufferer I would also show caution with this product that lists 'extract of germinated barley' as its second ingredients after water.
It was rather an expensive trial of 4 months for me, as it didn't do anything for me. Getting my vitamins and minerals and thyroid medication at the correct levels helped enormously.
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