美國Douglas Laboratories 液體 B12（甲鈷胺） Liquid B12 (Formulated with Methylcobalamin) 30 mL

產品說明
液體 B12 提供 1,000 微克高生物利用度的維生素 B12，並與甲鈷胺一起配製成美味、方便的天然櫻桃味液體。

功能
維生素 B12 對碳水化合物、脂肪和蛋白質的正常代謝至關重要。作為甲基丙二醯輔酶 A 變位酶的輔助因子，維生素 B12 有助於將奇數鏈脂肪酸和支鏈胺基酸轉化為琥珀醯輔酶 A，琥珀醯輔酶 A 是一種常見的檸檬酸循環中間體。維生素 B12 也是核酸 (DNA) 合成、半胱氨酸合成蛋氨酸以及神經系統正常髓鞘合成所必需的。  除了維生素 B6 和葉酸外，還需要足夠的維生素 B12 水平來維持正常的血漿同型半胱胺酸水平。某些人群，包括老年人和嚴格的素食者，經常有維生素 B12 缺乏的風險，這可能是由於飲食攝取量低或吸收受損。

研究表明，甲鈷胺（維生素B12的輔酶形式）可能在體內被更好地利用和更好地保留。其他研究表明，甲鈷胺本身可能在支持神經系統和免疫系統健康方面發揮重要作用。 

建議用法
成人每日服用1滴管（1毫升），或遵醫囑。

DESCRIPTION
Liquid B12 provides 1,000 mcg of highly bioavailable vitamin B12 and formulated with methylcobalamin in a tasty and convenient natural cherry-flavored liquid.

FUNCTIONS
Vitamin B12 is essential for normal metabolism of carbohydrates, fat and protein. As a cofactor for methylmalonyl-CoA mutase enzymes, vitamin B12 helps convert odd chain fatty acids and branched chain amino acids into succinyl-CoA, a common citric acid cycle intermediate. Vitamin B12 is also required for nucleic acid (DNA) synthesis, methionine synthesis from cysteine, and normal myelin synthesis in the nervous system. † Along with vitamin B6 and folic acid, adequate levels of vitamin B12 are required to maintain normal plasma homocysteine levels. Certain populations, including the elderly and strict vegetarians are often at risk for vitamin B12 deficiency, either due to low dietary intake or impaired absorption.

Studies indicate that methylcobalamin, a coenzyme form of B12, may be better utilized and better retained in the body. Other studies indicate that methylcobalamin itself may play important roles in supporting neurological and immune health.

SUGGESTED USE
Adults take 1 dropper (1 ml) daily or as directed by a healthcare professional.