This guide was built to give you a real working knowledge of the nutrients your body needs to function at its best. Spanning more than 80 pages and covering over 70 individual nutrients, From A to Zinc is one of the most comprehensive free nutritional references available anywhere. Every nutrient gets its own dedicated page, with clear information you can actually use, whether you’re addressing a specific deficiency, managing an existing condition, or simply trying to optimize your health.
For each nutrient, you’ll find what it does, what deficiency looks like, the best food and supplemental sources, and optimal dosage ranges drawn from functional and integrative practice rather than the conservative RDA, which was designed to prevent deficiency, not to support optimal health.
What’s in the guide:
- Plain-language overviews of what each nutrient does and why it matters
- Signs and symptoms of deficiency so you can recognize what your body may be telling you
- The best dietary sources for every nutrient covered
- Optimal dosage ranges with preferred supplement forms and bioavailability guidance
- Key contraindications and medication interactions
- Guidance for special populations: pregnancy, children, people on common medications, and those managing chronic conditions
- A dedicated section on building a smarter supplement protocol, because more is not always better
This guide was written by Dr. Kristina Carman, IMA Senior Fellow for Nutritional and Holistic Health, registered nutritional therapist, naturopathic doctor, functional medicine practitioner, and health coach. Kristina’s work is rooted in a straightforward belief: that food, nutrition, and lifestyle are among the most powerful forms of medicine available to us. Her practice is built as a true wellness hub, a place where guidance is friendly, thorough, and accessible to anyone ready to take their health seriously. She brings a whole-person approach to every patient she works with, leaving no stone unturned in the pursuit of lasting, natural health.
Please note: This guide is for educational purposes only and is not a substitute for personalized medical advice. Always consult a qualified healthcare professional before starting new supplements, especially if you are pregnant, breastfeeding, taking medication, or managing a medical condition. For contraindications, please refer to the end of this guide.
