Vitamin D is a fat soluble vitamin. Absorbs best when taken with higher-fat foods.
Once absorbed into the body, it's stored in fatty tissues and liver. The body can use these stores for future use.
Few more to the list...
MAST = Masteron
IM = Intramuscular
PIP = Post Injection Pain
LETRO = Lertozole
PRAMI = Pramipexole
ADEX = Arimidex
VAR = Anavar
HCG = Human Chorionic Gonadrotropin
SDROL = Superdrol
NPP = Nandrolone Phenylpropionate
MENT = Methylnortestosterone Acetate (Trestolone)
LE = Law Enforcement
UGL = Under Ground Lab
CIM = Cash in Mail
NATTY = Natural (WTF you doing here ?)