NHK, the Japanese national broadcaster, has a bunch of programs that highlight small businesses across the country with owner/operators, many of whom who work well beyond the traditional retirement age. It's pretty common to see people in their 70's & 80's running a family business or working at one. These small business owners often have had entire careers elsewhere then come back to the family business for a second career in retirement age. Being the third/fourth/fifth generation owner of a small business is very common in these shows and not one has ever said it's the Omega 3's in their diet keeping them going.