Side-by-Side Comparison
Essential Vitamins & Minerals
Iodine (Elemental I) vs. Magnesium (Elemental Mg)
Comparing 2 standards across 9 specifications. 9 key differences identified.
Comparing:
Iodine (Elemental I)
Magnesium (Elemental Mg)
Iodine is an essential halogen trace element required exclusively as an essential structural component of thyroid hormones thyroxine (T4) and triiodothyronine (T3), regulating metabolic rate, cellular respiration, and fetal neurodevelopment. Adult RDA is 150 µg, with an Upper Limit of 1,100 µg/day.
Magnesium is an essential macromineral required as an enzymatic cofactor in over 300 biochemical reactions including ATP synthesis, DNA replication, and neuromuscular transmission. Adult RDA is 400–420mg (men) / 310–320mg (women).
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
Nutrient Type
|
Essential Trace Halogen Element | Essential Macromineral |
|
Adult RDA / RDI
|
150 µg / day (220 µg pregnancy / 290 µg lactation) | 400 – 420 mg / day (Men) / 310 – 320 mg / day (Women) |
|
Tolerable Upper Limit (UL)
|
1,100 µg / day (Avoid Wolff-Chaikoff thyroid autoregulatory shutdown) | 350 mg / day (From supplemental forms only; no limit on whole foods) |
|
Chemical Forms
|
Iodide (I- / Potassium Iodide KI, Potassium Iodate KIO3 in iodized salt), Molecular Iodine | Magnesium Glycinate (Chelate), Citrate, Malate, Oxide, L-Threonate |
|
Primary Biological Function
|
Constituent of Thyroxine (T4, 4 iodine atoms / 65% by weight) and Triiodothyronine (T3, 3 iodine atoms / 59% by weight) | Mg-ATP complex cofactor (>300 enzymes), NMDA receptor gatekeeper, Protein synthesis, Muscle relaxation |
|
Deficiency Condition
|
Endemic Goiter (Compensatory thyroid enlargement), Congenital Hypothyroidism / Cretinism (Permanent neurodevelopmental impairment), Maternal miscarriages | Muscle cramps, Tremors, Ventricular arrhythmias, Insulin resistance, Insomnia |
|
Top Whole Food Sources
|
Kombu Kelp, Nori Seaweed, Atlantic Cod, Eastern Oysters, Iodized Table Salt, Greek Yogurt, Dairy Milk, Eggs | Pumpkin Seeds, Hemp Hearts, Chia Seeds, Almonds, Spinach, Black Beans, Dark Chocolate |
|
Iodized Salt Public Health Impact
|
Universal salt iodization (45–75 mg KI / kg salt) is hailed as one of the greatest global public health achievements, eradicating cretinism worldwide | — |
|
Cellular Distribution
|
— | 99% intracellular (60% bone, 39% skeletal muscle, <1% serum) |
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