> Instead of taking a multivitamin you can just eat food. Food has vitamins and minerals.
No, it's not enough [1]. Long story short: to provide the needed amount vitamins and minerals you'd have to eat lot more calories than your body needs. So to achieve correct balance between calories and vitamins and minerals, you need to enrich food with supplements.
How do you explain people like myself, who don't take any supplements, don't have any vitamin deficiencies, and are in good health?
The study you linked finds varying decline in vitamin and mineral content of common crops over time, not a study showing that people who don't take multivitamins have vitamin deficiencies. And it has methodological problems highlighted by a followup study [1]: "Comparisons of food composition data published decades apart are not reliable. Over time changes in data sources, crop varieties, geographic origin, ripeness, sample size, sampling methods, laboratory analysis and statistical treatment affect reported nutrient levels."
I can't explain people like yourself. I can't even explain myself why I lack vitamins and minerals. All I can do is congratulate your excellent health and keep taking supplements to maintain my desired levels.
Stop eating so much. Learn how to fast properly and over time you will have tons of energy. No supplements needed. It's shocking how we have been persuaded over time to rely on drugs and supplements to feel normal...tsk tsk.