Sometimes it can also be done at a medical center through your gastroenterologist so if you cannot get him to order one of the labs above, ask for GI referral
Some especially rich sources of vitamin B12 include the following: Beef kidney: 1/3 cup (75 g) provides 311% of the recommended dietary intake (RDI) Beef liver: 1/3 cup (75 g) provides 881% of the RDI Canned salmon: 1/3 cup (75 g) provides 61% of the RDI Eggs: 2 large eggs provide 25% of the RDI Ground beef: 1/3 cup (75 g) provides 40% of the RDI Milk: 1 cup (250 ml) provides 20% of the RDI Trout: 1/3 cup (75 g) provides 61% of the RDI Although most insurance is accepted for a vitamin B12 injection, you should contact your insurance company before your visit to confirm coverage and cost
But HPLC and mass spectrometry the tests behind that number were never designed to detect contamination
In freeze-dried form, the compound stays stable for extended periods under proper storage
Methionine-rich foods include: Chicken (dark meat) Turkey Lamb Beef Tuna Pork Grouper Salmon Cysteine-rich foods include: Chicken (dark meat) Lamb Pork Oats Goose Beef Soybeans Buckwheat Additional foods high in sulfur include: Allium vegetables (garlic, leeks, chives, onions, etc.) Cheese, especially cheddar and parmesan Cruciferous vegetables (broccoli, Brussels sprouts, cauliflower, cabbage, kale, etc.) Legumes Dried fruits In addition to food sources, some people may have sulfur in their water, depending on the treatment process and the pipe materials
For research laboratory professionals only