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…but a gene result alone does not choose the form or amount. Food sources Eggs; dairy; liver; orange and dark-green vegetables containing provitamin A carotenoids. Supplement forms Retinyl palmitate, retinyl acetate and beta-carotene. What t…

…cy and absorption concerns require clinical interpretation. Food sources Fish; meat; eggs; dairy; foods fortified with B12. Unfortified plant foods are not reliable sources. Supplement forms Cyanocobalamin, methylcobalamin, hydroxocobalamin…

…be assumed to eliminate the risks of excessive B6 exposure. Food sources Chickpeas; fish; poultry; potatoes; bananas; fortified cereals. Supplement forms Pyridoxine hydrochloride and pyridoxal-5-phosphate (P5P). A question to bring to your …

…oduct is being considered and distinguish it from K2 forms. Food sources Leafy greens; broccoli; Brussels sprouts. Supplement forms Phylloquinone, also called phytonadione. What to track and reassess Coordinate any vitamin K change with the…

A carotenoid found in foods and in the retina. Also called: Zeaxanthin What it does A carotenoid found in foods and in the retina. How supplementation is approached Zeaxanthin is a plant pigment found in the eye and often paired with lutein…

…for the effects of prolonged high intake on copper balance. Food sources Oysters; meat; poultry; beans; pumpkin seeds; fortified cereals. Supplement forms Zinc gluconate, citrate and sulfate are examples. A question to bring to your visit H…

NAT2 encodes N-acetyltransferase 2, which helps process certain drugs and other compounds. Combinations of variants can influence acetylation status; one SNP usually does not tell the entire story.

…together Dr. Purser’s panel connects IL-4 with allergic and food-reaction contexts and discusses vitamin D as part of that picture. The helpful distinction is between confirmed allergy, a reproducible food-associated symptom and a genetic a…

Ever remember something I said in a video but have no idea which video it was? We’ve been working on that. Introducing **Purser Wellness Explore** a new home for my teaching, organized so you can find the subjects that matter to you. MTH

Explore HFE, H63D, rs1799945, C282Y, hereditary hemochromatosis, iron overload, ferritin, transferrin saturation, and monitoring and phlebotomy.

Explore HbA1c, red blood cell turnover, hemoglobin variants, blood loss, hypoglycemia, and factors that may affect a low A1C result.

What if your constant sugar cravings are not simply a willpower problem? You wake up tired. You reach for sugar or quick carbohydrates. You feel better for a little while. Then the crash hits and you are searching for energy all over ag