I'm cutting to the chase as you can go read the whole link and give them the hit.
Smell training involves sniffing four different odors — typically from the categories flowery, fruity, spicy and resinous — twice a day for a period of about four to six months. Often, essential oils of rose, lemon, clove and eucalyptus are used for smell training due to their concentrated scents.
It’s believed that smell training may increase the expression or growth of olfactory receptor neurons, helping to bring back the ability to smell. In a meta-analysis of 13 studies, smell training led to significant positive effects for all olfactory abilities, with researchers noting, “[S]uch training should be considered an addition or alternative to existing smell treatment methods.”
Another meta-analysis found a significant improvement in olfactory discrimination and olfactory identification following smell training. It’s also been suggested that changing the odors used periodically during smell training may increase its success. In addition to essential oils, a range of other odors have also been used with success, including:
Six Natural Options for Anosmia
To help regain your sense of smell, a variety of herbal and therapeutic options are available
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