They thrive. The rainforest in Panama’s Barro Colorado Nature Monument is the perfect place to study whether some trees are immune to lightning. It’s home to the Smithsonian Tropical Research ...

The immune system encounters common food allergens -- peanuts, tree nuts, milk, eggs and shellfish, among others -- without launching a self-sabotaging immune attack in a process called tolerance.

The reasons for this are unclear. However, we know our cells – including those in the immune system – require good nutrition to function optimally. Plants are packed with vitamins and minerals.