Start
here.
I took part in a study into the effects of nitrates on blood lactate at St Mary's College, and the researcher doing the study was telling me a story about a colleague who was doing a study on compression garments. He found no measurable impact, and was somewhat stumped as to how he should present his findings given the study was funded by a compression garment manufacturer.
There is 'some' evidence that if you 'believe' in the effect, then some small improvements may materialise. But that's placebo.
Ice baths are another widely used spurious recovery method. I actually experimented with this, but was massively pleased when I found no difference. They are bloody awful.
Well structured training, good quality nutrition, and quality rest is what you need, not miracle cures.