Hi - It depends upon the mushroom and quantity. Here's the list I have;
White (reg grocery store mushrooms) - 1/2 cup = 130mg
Cremini/Baby Portobello - 1 medium = 65mg
Portobello - 1 medium = 410mg
Porcini - 1/2 cup = 280mg
Morel - 1/2 cup = 200mg
Maitake - 1/2 cup = 160mg
Enoki - 1/2 cup = 135mg
Oyster - 1 medium = 80 mg
Shitake - 1/2 cup = 60mg
Wood Ear - 1/2 cup = 20mg
This is the book I am using is:
Dr. Richter's Fresh Produce Guide
Author: Dr. Henry Richter
ISBN# 0-9703139-0-X
It is printed by:
Try-Foods International, Inc.
207 Semoran Commerce Place
Apopka, Florida 32703
Orders: 1-800-421-8871
This book had been a life saver for me. Hope it helps.
Lulu