This is true only if your dentures look unnatural or need re-fitting. Confidence in wearing dentures comes from realizing that you have taken a positive step towards improving your health and appearance. Denture wearers can't eat normally, or even speak properly. While not all denture wearers can eat everything they would like, many have very few restrictions in their diets. So if you develop persistent eating or speech problems at any time, have your dentist check the fit of your dentures as soon as possible.
Good nutrition is just as important for mature adults as it is for younger persons.
Properly fitting dentures may actually encourage you to eat a varied and well-balanced diet that maximizes your oral health. I have to use adhesives to make my dentures fit, or I can't wear them all day. This is a particularly dangerous myth. Dentures are made to fit precisely and usually do not require use of an adhesive for comfort. In an emergency, denture adhesives can be used to keep the dentures stable until you see the dentist, but prolonged use can mask infections and cause bone loss in the jaw.