Add the nutrient targets. Be sure to speak about both the recommended daily allowance and the tolerable upper level.
Decision: should it be by gender? and by age? or just some general estimate for the average adult?
Decision: should the targets go under the nutrient targets heading, or be incorporated into each subheading of nutrients? A bit of both, perhaps? On one hand, adding numbers too early might overwhelm the reader; on the other hand, having no early numbers at all might make it hard to build a proper picture in the reader's mind.
Talk more about specific nutrients:
Vitamin A: the various forms, and how beta-carotene has the least risk of overdose, and how to really get the most of it from carrots
Vitamin D: compare D2 and D3; both are effective, but only D3 can really be stored long-term in the body; D3 is also the form that the skin naturally produces in the sun. Also mention that sunlight is not essential at all if you supplement vitamin D.
Vitamins C and E: The water-soluble and fat-soluble antioxidants (respectively). Mention that other non-vitamin antioxidants exist too.
Omega-3 and omega-6: List sources of them, and does the global supply chain enough of each? Also talk about how they're inherently fragile molecules (prone to oxidation/rancidity) but still essential, The "pro saturated fat" folks sometimes get this wrong.
Protein: talk about chemistry (the body is made of protein, digestion breaks down proteins into amino acids which get rearranged into new proteins that make the human body. protein consumption as maintenance, is mostly due to deamination). also, talk about how the protein required to build muscle is not actually a lot, even during extreme muscle gains.
add subheading "Toxins & anti-nutrients" - define, give examples, and then explain how it's generally not a major concern, but list exceptions.
On supplements: Turn the "that is not true" into a p2 explaining why, at least in simple terms fundamental to how vitamins are discovered