Yes, milk thistle had an impact on my symptoms and I feel less reflux if I take it. I have hypersensitive oesophagus, so I don't know if the milk thistle reduces reflux or just reduces sensation of reflux in my case. However, it is supposed to be a mild prokinetic. When it seemed to help I thought I'd cure myself by taking it several times a day (before every meal) but sadly the effect seems limited - 2 capsules does no more than 1 does! However, I do get benefit.
DGL is also helpful.
Marshmallow in tea form is soothing, if you can tolerate teas. Some people say camomile tea is good but it didn't help me personally.
GERD (3 years and counting)
Lifelong stuff: Food allergies/intolerance, eczema, asthma