Trying to figure out if it's the heat and humidity, or my new "stuff". As of yesterday I started taking Tietelbaum's multivitamin (powder), and B-complex, as well as probiotics and digestive enzymes - and NADH. I felt pretty good yesterday. By mid afternoon I had a horrid headache (likely weather related mind you)... and by midnight I felt slightly nauseous. Today I'm even more tired than I have been lately, and have a vaguely nauseous and dizzy feeling. Just kind of icky. Just wondering if it's possible that the herx reaction could happen that fast ? It's been awhile since I've gone through it... like 7 years or so :b Anyone know ? Shannon L.