In general, drug administration during the feeding state is considered safer than that during the fasting state, mostly because the rate of drug administration through the digestive system decreases during feeding
20,55 DELIVERIES IN 48/72H SECURE PAYMENT The L-carnitine in MARNYS L-carnitine + vitamin B5 is formulated with top quality ingredients: L-carnitine Tartrate that provides 66% L-carnitine certified by Drug Master File (DMF) , a document containing complete information on the product, including chemistry, manufacturing, purity, impurity profile, control of the active ingredient (thus guaranteeing quality), safety, stability and purity of the raw material
(2009) L-Carnitine supplementation reduces oxidized LDL cholesterol in patients with diabetes
The thread on tests for PA and B12 deficiency mentions other tests that can help to diagnose PA eg gastrin test and others (link in my other reply) When you were tested for coeliac disease
Role of advanced glycation end products and their receptors in development of diabetic neuropathy
"You should never purchase something you inject in your body without the supervision of a healthcare provider," says LaValle