>but their effect is usually caused by the synergy that exists between them
It's simple result from the fact that least available essential nutrient is the most important for health outcomes.
If you have a rain barrel full of holes, only fixing the lowest hole changes the water level. Fixing all other holes starts to have an effect after you have fixed the lowest one.
It's simple result from the fact that least available essential nutrient is the most important for health outcomes.
If you have a rain barrel full of holes, only fixing the lowest hole changes the water level. Fixing all other holes starts to have an effect after you have fixed the lowest one.