Glycero-Phosphates with or without the Formates. When you feel unable to work and physically run down a change and a good tonic is the most rational course. Huxley's “Ner-Vigor” Tonic supplies those mineral substances which when absorbed change the condition of the blood creating new life and new vigor. Physicians throughout the World continue to prescribe this as one of the … [Read more...] about Huxley’s Ner-Vigor Tonic