Yes. Wearing masks for over 20 minutes causes deleterious conditions leading to cancer.

Let's look at the human lung. It is essentially a very sophisticated filtration system that extracts oxygen from which would otherwise be toxic. A mere drop of 1.5% oxygen intake is hazardous to your health. The more time you spend at this level, the more damage occurs to the organs of your body, including the 'auto-pilot' processes, and the brain.

There is no question face masks restrict the flow of oxygen to your lungs. Very quickly moisture from your exhale clogs up the fabric mesh of the mask and the majority of air is pulled in from the edges of the mask. Yet, air is pulled-in through the fabric mesh too along with condensation of moisture that has accumulated there. This condensation increasingly becomes quite literally, a Petri dish of pathogens.

No wonder 85% of the symptomatic wore face masks often or always. It's a recipe for disaster. I could sit in a closed garage with my car running and not get the same adverse effect. It is that bad. The composition of air is listed below:

Nitrogen -- N2 -- 78.084%

Oxygen -- O2 -- 20.9476%

Argon -- Ar -- 0.934%

Carbon Dioxide -- CO2 -- 0.0314%

I have only talked about oxygen depletion and have not talked about carbon dioxide (CO2) build up. When the lungs intake much more CO2 than the body can tolerate, Hypercapnia occurs. This is a build-up of CO2 in the red-blood cells. The deleterious effects of this can not be under estimated. Symptoms of CO2 poisoning are:

• Deeper breathing 
• Twitching of muscles 
• Increased blood pressure 
• Headache 
• Increased pulse rate 
• Loss of judgment 
• Labored breathing 
• Unconsciousness (occurs in under a minute when CO2 concentration rises about 10%) 
• Death 

I'm a scuba diver and recognize the risk of carbon dioxide intoxication and poisoning. It is usually from poor air filtration, not breathing at the normal rate, or simply from having a harder time breathing. It's extremely important to recognize the symptoms early on because the dangers posed soon turns deadly to a scuba diver from disorientation and passing out. Essentially, face masks foster a similar level of danger.

While carbon dioxide can be toxic, it is a normal component of air consisting of 0.0314% of air. The body actually uses carbon dioxide to maintain proper pH levels and to synthesize fatty acids. Ask yourself, how much does your CO2 intake increase by wearing a face mask? 2X? 3X?...10X? The average CO2 in exhale is 4%. If air consists of 0.0314%, the increase of inhaling CO2 wearing a face mask is significant. Long term effects of wearing face masks leads to altering the PH level of your body to being increasingly acidic. The condition from CO2 in the blood stream is called acidosis. All cancers exist with acidosis.

A PH level that is acidic is cancerous, damages your vital organs, including your brain.

Anyone wearing a face mask for more than 20 minutes is already irreparably damaging their organs.