everything which begins new life and is fully natural is healthy:
eggs, nuts, seeds, caviar, fruits - notice that many of these foods are high in zinc. if you ejaculate too often, your zinc deposits will fall (semen contains lots of zinc). so diet alone is not enough, its a whole lifestyle that matters!
raw milk and raw meats are good too, and has been eaten for millenia.
fermented foods: natto, hard cheeses (both highest in vitamin K2 or "activator X", works in synergy with vit A, D, E ), kefir, sauerkraut.
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other critical factors are:
1) sunshine. there is literally zero UVB in countries: UK, Denmark, North Germany, Norway, Sweden, Finland, Poland, Lithuania, Latvia, Estonia, Belgium. The white population there is weak both in fertility and health and will shrink very rapidly. Check the streets of London if you dont believe me.
2) barefoot contact with Earth. There are people who never touch earth 99.9% of the time. usually, they are sick or not optimally healthy.
3) emotional state. if you love money instead of life itself or chase material things, your body will respond negatively sooner or later. guaranteed.
4) sleep quality. again, without sunshine in the day, your pineal gland won't produce enough hormones at night. steve jobs was a perfect example: he wanted to work whole nights in front of the screens and such habit ruins the glands. esp. bright screens during the night totally destroy the pineal gland activity.
5) physical activity. get your ass out of the 3C - couch, chair, car!!! or your butt and cojones will get smaller.
human body is a giant, immensly complex chemical and electrical structure.
diet is just a small part. it wont help you if you lead so called modern ipad, iphone, iTV lifestyle.