What is the best way to: Is there a natural way to repel mosquitoes without using chemical sprays?

Available choices:
[1]. A study in the 1960s showed that mosquitoes think vitamin B1 makes a person stink, and will avoid alighting (and therefore biting ) such a person. Taking extra B1 during mosquito season may make your life a whole lot more pleasant.
[2]. Study shows Vitamins can make you avoidably stinky.
Answer:
[1].