2. 柳橙：降低焦慮，能夠在壓力下保持冷靜，可能是因為其香味可減少應激激素。
3. 肉桂：改善警覺性，例如:讓司機們更加集中，減少車禍機率。
4. 薰衣草：促進放鬆，緩解經前綜合症，因其香味引發人體的休息和消化反應，也能減少焦慮、失眠和偏頭痛。
5. 迷迭香：增強腦力，提高體能、速度和準確性，也能降低疲勞。
6. 薄荷：呼吸薄荷淡香水能降低體內皮質醇(應激激素)，也能減少疲勞和對巧克力的渴望。
Sage
Best for: Blood-Pressure Reduction.
In a July 2013 study, women who smelled clary sage experienced reduced blood pressure and breathing rates; they were also able to relax during a stressful medical exam. Bonus perks: Helps amp up memory and attention
Peppermint
Best for: Stress Relief
Research shows that breathing in eau de peppermint can decrease the body's levels of cortisol, a stress hormone.
Orange
Best for: Decreasing Anxiety
A study found that people who sniffed it before a stressful test were able to stay calm under pressure, sans anxiety spikes, possibly because the scent can help slash stress hormones.
Bonus perk: Elevates mood.
Rosemary
Best for: Enhancing Brainpower
Breathing it in can improve speed and accuracy during demanding mental tasks, per a 2012 study. Other research found its scent left people feeling refreshed and mentally stimulated.
Bonus perks: Boosts energy and lowers fatigue.
Cinnamon
Best for: Improving Focus
It may stoke the area of the brain that governs alertness. For example, research found that drivers were more focused and less flustered after breathing in cinnamon-oil scents.
Bonus perks: Increases concentration and reduces frustration.
Lavender
Best for: Relaxation; Relieving PMS
The scent can trigger the body's "rest and digest" response, promoting relaxation. A 2013 study found that it also eases pre-period symptoms such as mental confusion and depression.
Bonus perks: Decreases anxiety, insomnia and migraine pain.