Everything about Eyes
Eyes: all articles — from dosage to timing, explained clearly.
Too much vitamin A: where the limit really is
3,000 µg a day is the upper limit for preformed vitamin A. Why one portion of liver exceeds it many times over and the tablet usually does not.
Taking lutein: fat matters, the time of day barely
Whether lutein reaches the blood is decided by the fat in the meal, not the time of day. What the studies show on fat amount, timing and duration.
Buying eye supplements: label, amount, combination
How to judge an eye supplement: which details are mandatory, why lutein carries no percentage figure, and where the sum of several products gets tight.
Vitamin A and vision: the approved claim
Vitamin A contributes to the maintenance of normal vision is one of six approved claims. What it covers, from what amount it applies, and where it ends.
Lutein and zeaxanthin: origin, sources, evidence
Lutein comes from marigold flowers, zeaxanthin from peppers or synthesis. What foods contain and why lutein esters are not the same as lutein.
Lutein in foods: what one portion delivers
Spinach, kale, egg yolk: what a realistic portion delivers in lutein, what cooking does to it and why fat matters more than the variety.
Zinc and vision: the approved claim and the amount
Zinc contributes to the maintenance of normal vision — the claim applies from 1.5 mg per daily portion. Why more zinc does not make it any stronger.
Vitamin E and the eyes: what may be claimed
Vitamin E carries exactly one approved claim, and it applies to cells in general, not to the eye. What that means for eye supplements.
Eye nutrients: which claims are approved
Four nutrients may be linked to vision in the EU: vitamin A, riboflavin, zinc and DHA. Lutein and zeaxanthin are not among them — both were refused.
Eyes and screen work: what the evidence shows
Tired, dry eyes after eight hours at a monitor are real. What the studies show, which advertising claims the EU rejected and what an employer owes you.