Supplements are recommended only by a nutritional therapist, as part of a consultation — never automatically from a test result.
Practitioner-grade supplements are formulated to be taken with guidance rather than picked off a shelf.
Two products can contain the same amount of magnesium and behave quite differently. Magnesium glycinate is absorbed more readily and is gentler on the stomach than magnesium oxide; methylfolate is the form of folate the body can use directly. That is why you can filter by nutrient form here — not just by which nutrient a product contains, but by which form it is in.
A bigger bottle looks more expensive and is often cheaper to use. Every product here shows what a daily serving costs, worked out from the number of servings in the pack, so two products can be compared without doing the arithmetic yourself.
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