A large male might have a mass of 55 grams.
The amount required is on the order of 17 grams a day for a 154-pound man.
For all its size, it didn't mass more than a couple of grams.
The brain was larger, too, with a weight of 800 to 1100 grams.
Just a couple of grams, mind, to get them off to sleep in the evenings.
In Norway the same name was used for a weight of 498.1 grams.
Doses of three grams per day or less for up to eight weeks seem to be safe.
If elevated, this is followed with a test of 100 grams over three hours.
Doses of 40 grams per day seem to produce the best effect.
In China, it has been given a metric value of 50 grams.