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Most adults do best with 1 Brazil nut on days they eat them, since selenium can pile up fast and the nut-to-nut range is wide.

One serving of bread is usually 1 slice (about 1 ounce/28 g), or the amount that counts as 1 ounce-equivalent of grains.

Most adults feel best with 2–4 slices’ worth of bread per day, adjusted for calorie needs and whether the bread is whole grain or refined.

In healthy adults, total brain volume often drops around 0.2–0.5% per year after midlife, with faster loss in later decades.

Across a normal day, many brain networks stay active, and scans show no “90% unused” reserve sitting idle.

The adult brain uses about 20% of resting energy—around 20 watts—across most of the day.

Your brain runs all day: most regions stay active, and it burns about one-fifth of your body’s resting energy.

In the U.S., one drink of straight bourbon is usually a 1.5-fl-oz (44 mL) pour of 80-proof (40% ABV) bourbon.

Too much bourbon is the point where your thinking, balance, or breathing changes, or you can’t track what you drank or when.

People activate all parts of the brain over a day; scans show shifting hotspots, not unused zones.