The loss of ability to absorb vitamin B 12 (B 12) is the most common cause of adult B 12 deficiency. Impaired absorption of vitamin B 12 may be due to a loss of intrinsic factor or to a number of other conditions that decrease production of gastric acid, which also plays a part in the absorption of B 12 from foods.
One of the best natural insect repellent is Lemon Balm. If you insist to go for organic route, Lemon Balm which contains high Citronellal contents is able to repel insects such as mosquitoes, flies, ants and etc. However, Lemon Balm does not deter butterflies or bees.
The Mosquito Plant. The Lemon-scented Geranium is also commonly known as the Mosquito Plant. This particular member of the Germanium family is known to repel mosquitoes and replace them with a hint of lemon. If you know a good deal when you see one, try out a lemon scented germanium to get rid of those pesky insects.