(More water kept in the bloodstream = more blood volume.)[ref] Angiotensin system and POTS: For some people, the renin-angiotensin-aldosterone system is involved in POTS
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One decision addressed Vape Nation Ltds television ad for KiK electronic cigarettes in which a man tells a group of friends gathered at an outdoor restaurant that he used to smoke normal cigarettes but after quitting he started smoking e-cigarettes and now prefers them. The ASA determined that the ad was irresponsible because the mans statement could encourage non-smokers to take up using e-cigarettes. Also in December, the ASA banned an ad for Must Have Ltds VIP Electronic Cigarettes that it found indirectly promoted the use of tobacco products because it created a strong association with traditional tobacco smoking and presented it in a sultry and glamorous way. Earlier in the year the authority banned Vapourlites Ltd from running ads that claimed e-cigarettes were a harm reduction alternative to smoking unless the company could substantiate it with robust evidence. Consumers file class-actions While the FDA hasnt taken action against any e-cigarette companies for advertising claims, at least two are facing class-action lawsuits

However, further studies could elucidate new mechanisms, perhaps involving components of tobacco smoke or vaping, possibly enabling development of novel preventative or treatment measures
Delnevo CD, Pevzner ES, Hrywna M, Lewis MJ