B12 only comes from animal products
In our experience from member comments, no primary care doctor in the UK has access to, or has heard of, this test
Lipolytic refers to the ability to break down fat (lipolysis)
doi:10.7326/0003-4819-143-3-200508020-00006
[1] [6] Severe deficiencies may include symptoms of reduced heart function, suppression of bone marrow, as well as more various severe neurological symptoms possibly including sensory loss, abnormal balance and reflexes, memory and consciousness impairment, smell and taste problems, depression, irritability, confusion, and psychosis