Dr. Berg is the most knowledgeable nutritionist on youtube. He uses his whiteboard to communicate complex concepts easy. To tell you from my heart he is 95% right on all issues. The 5% is due to me not willing to change to his reasonable recommendations. Of all his supplement i use his “Adrenal and Cortisol Support” formula every morning – it works very well for me. Also, he is generous enough to recommend supplements outside of his product line and every of his recommendation has a small positive impact on my mood, weight and other clinical parameters. I wish he had an office in San Francisco so i can visit him. Also, i very rarely recommend professional services, but Dr. Berg is my hero – i have lost 20 lbs on cetogenic diet and improved my mood Dr. Berg recommended supplements. Watch all of his videos!!!