Almonds enhance problem-solving skills, improve memory and increase attention, while walnuts speed up processing of information, boost levels of serotonin and decrease stress levels.

It has the ability to slow respiratory rates and decrease stress response in labour.

Roses, lavender and jasmine all have scents that lower anxiety while pine trees decrease stress levels.

These changes decrease stress on the heart by decreasing systemic resistance and increasing cardiac output, which decrease preload and afterload.

Studies have found that meditation significantly decreases stress related cortisol secretion which protects neurons against stress and stimulates the production of new neurons.