The researchers cited previous studies that found that 25% of those over 50 suffer from olfactory impairment (loss of sense of smell), with aging being the most common cause. The study also noted that a reduction in sense of smell can have a sever impact on quality of life.
The study exposed participants to four intense odors (rose oil, eucalyptus, citronella, and clove oil) twice a day over the study period. Participants showed a significant improvement in their ability to smell, while a control group showed no change. Good stuff and good support for The 15 Minute Fix: SENSES.
The smell-related exercises in The 15 Minute Fix: SENSES are an effective, easy way to realize the benefit of training your sense of smell. Along with exercises targeting hearing, taste, and touch, you will find a dozen exercises designed to improve your sense of smell. As this study shows though, even on days when you don't have time to engage in a full sensory/olfactory workout, just spending a minute sniffing three or four distinct, non-offensive odors (essential oils, spices, flavor extracts, etc.) a couple of times a day will improve your sense of smell if you do it every day for a few months.
Age well my friends!