Stress is the number one cause of constricted blood vessels, heart failure.
Tar & other toxins build up & cause constrictions, yes.
Studies show that eCigs (nicotine without the tar & crapiolie) do not constrict, & the veins remain flexible.
Studies show that nicotine actually promotes healthy cells. Smoke kills cells, nicotine multiplies thriving cells.
Studies show that nicotine restores brain damage, cognitive skills, focus, and relieves Alzheimer's, ADHD, Parkinson's, and more.
Until lately, they were always baffled by the smokers paradox. Smokers survived when non smokers died.
Today, they want to delete the nicotine from real cigarettes & are doing their darnedest to ban eCigs and I'm sure the NRT's will be next. They now KNOW it's the smoke & tar that kills, & nicotine is the beneficial life saving aspect.
Most smokers who died from smoking related diseases were in their 70's & 80's. They lived 20 years LONGER than their age groups life expectancy. There is STILL no link between passive smoking and lung cancer. It's environmental & some even swear it's from the cancer laden vaccinations. Smoking is the scapegoat. Smoking is down, cancer is up.
Nicotine is FDA approved. Find various nicotrol and Nicorette studies like http://www.nicorette.co.uk/help-and-support/nicotine-myths. And. http://www.pfizer.com/sites/default/files/products/uspi_nicotrol_inhaler.pdf
And. http://journal.publications.chestnet.org/data/Journals/CHEST/21727/438.pdf. Etc
Restores. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3712985/. And. http://www.ploscollections.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0068517
Cognitive skills http://www.ncbi.nlm.nih.gov/pubmed/11230877
Big Pharma wants to patent a "smart pill". http://www.salon.com/2013/12/29/sciences_obsession_the_search_for_a_smart_pill/
More BP http://www.hsc.unt.edu/news/newsrelease.cfm?ID=1250#.Uvfu53-9KSM
No adverse effects http://www.ecigarette-research.com/web/index.php/research/127-no-adverse-effects
Does not harm lung function http://www.cocktailnerd.com/new-study-reveals-e-cigs-do-not-harm-lung-function/
Cardiac cells http://www.ecigarette-research.com/web/index.php/research/135-evaluation-of-the-cytotoxic
Go through every single one of Dr. Farsalinos research notes. He also has videos at YT. One video actually shows the cells thriving and multiplying.
Ps. Stress, the number one focus of anti's upon nicotine users. http://www.heart.org/HEARTORG/Conditions/HighBloodPressure/PreventionTreatmentofHighBloodPressure/Stress-and-Blood-Pressure_UCM_301883_Article.jsp http://mentalhealth.about.com/library/sci/0502/blheart502.htm http://www.stress-relief-tools.com/long-term-effects-of-stress.html http://natural-health-alternative.blogspot.com/2010/02/migraines-dilationconstriction-of-blood.html
The number one http://www.webmd.com/balance/stress-management/features/how-anger-hurts-your-heart
How to wake up and make stress less harmful. http://new.ted.com/talks/kelly_mcgonigal_how_to_make_stress_your_friend
One video out of many on cardiovascular cells http://youtu.be/clGmu7jeSuY