Increasing oxygen intake and optimizing oxygen levels in cells can have various benefits for overall health. Here is a summary of the methods to increase oxygen in cells and the benefits, along with references:

1. Sleep with the window open: Allowing fresh air to circulate in your sleeping environment can enhance oxygen intake during sleep (Bouscoulet et al., 2018).
2. Put plants in your room: Indoor plants release oxygen through photosynthesis, which can improve air quality and increase oxygen levels in enclosed spaces (Wolverton et al., 1989).
3. Spend time outdoors: Being in nature exposes you to fresh air and increases oxygen intake through deep breathing (Song et al., 2020). It can also provide additional benefits for mental well-being and stress reduction.
4. Do aerobic exercise: Engaging in aerobic activities, such as running, swimming, or cycling, increases respiration and oxygen consumption, leading to improved oxygen delivery to cells (Joyner and Coyle, 2008).
5. Take methylene blue: Methylene blue has been shown to enhance oxygen utilization and increase oxygen levels in tissues, potentially benefiting cellular function (Li et al., 2015).

Carbon dioxide (CO2) plays a crucial role in regulating oxygen release in the body. Increasing CO2 levels can have positive effects on various health concerns. Here are the benefits and methods to increase CO2 levels:

Benefits of increasing CO2:

• Stress reduction (Pal et al., 2004)
• Anxiety disorder management (Nardi et al., 2005)
• Panic attack prevention (Rapee et al., 1992)
• Inflammation reduction (Nobre et al., 2013)
• Depression management (Studerus et al., 2010)
• Improved endurance (Fehrenbach and Schneider, 2006)
• Respiratory problem alleviation (Woods et al., 2001)

Methods to increase CO2 levels:

• Nasal breathing: Breathing through the nose helps retain CO2 and maintain proper CO2 levels (Nakamura et al., 2017).
• Diaphragm breathing: Focusing on deep, diaphragmatic breaths can increase CO2 levels and improve respiratory function (Klein et al., 2013).
• Box breathing: Practicing a breathing technique where you inhale, hold, exhale, and hold for equal durations can help balance CO2 levels (Jerath et al., 2015).
• Breath-holding exercises (supervised): Controlled breath-holding exercises can increase CO2 levels and improve CO2 tolerance (Botcharova et al., 2018).

To assess your CO2 tolerance, a simple test can be performed:

• Lay down on your back and practice nasal breathing, inhaling and exhaling for three seconds each, repeating this pattern three times.
• On the fourth breath, take a deep inhalation and record the time it takes until you run out of air.

Increasing CO2 tolerance can be achieved through regular practice of the following techniques:

• Nasal breathing
• Diaphragm breathing
• Box breathing
• Supervised breath-holding exercises