(4 mins) Transcript. Dr Greger's summary: "Yellow plant pigments, such as lutein and zeaxanthin, build up in the back of our eyes to protect our retinas against age-related macular degeneration. Levels of these eyesight–saving nutrients in organic free-range eggs, vegetables, and goji berries are compared."

(1 min) Transcript. Dr Greger's summary: "How to buy goji berries cheaper than raisins." He suggests visiting an Asian store and looking for 'lycium berries'.

(2 mins) Transcript. Dr Greger's summary: "There are some dried fruits even more antioxidant-packed than goji berries."

(5 mins) Transcript. Dr Greger's summary: "The melatonin content in certain plant foods such as almonds, raspberries, and goji berries may explain the improvement in sleep quality associated with tart cherry consumption."