# item.guide
Side-by-Side Comparison Essential Vitamins & Minerals

Iodine (Elemental I) vs. Zinc (Elemental Zn)

Comparing 2 standards across 9 specifications. 9 key differences identified.

Comparing:
Iodine (Elemental I)
Zinc (Elemental Zn)
Iodine (Elemental I) →

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.

View full Iodine (Elemental I) spec sheet →
Zinc (Elemental Zn) →

Zinc is an essential trace mineral serving as a structural component in over 2,000 transcription factor 'zinc finger' proteins and catalytic cofactor for 300+ enzymes. Adult RDA is 11mg (men) / 8mg (women), with a Tolerable Upper Limit of 40mg/day.

View full Zinc (Elemental Zn) spec sheet →

Specification Comparison Table

9 Parameters
Parameter / Spec
Iodine (Elemental I)
Zinc (Elemental Zn)
Nutrient Type
Essential Trace Halogen Element Essential Trace Mineral
Adult RDA / RDI
150 µg / day (220 µg pregnancy / 290 µg lactation) 11 mg / day (Men) / 8 mg / day (Women)
Tolerable Upper Limit (UL)
1,100 µg / day (Avoid Wolff-Chaikoff thyroid autoregulatory shutdown) 40 mg / day (Chronic excess induces copper deficiency)
Chemical Forms
Iodide (I- / Potassium Iodide KI, Potassium Iodate KIO3 in iodized salt), Molecular Iodine Zinc Picolinate, Bisglycinate, Gluconate, Sulfate, Oxide
Primary Biological Function
Constituent of Thyroxine (T4, 4 iodine atoms / 65% by weight) and Triiodothyronine (T3, 3 iodine atoms / 59% by weight) Zinc finger DNA transcription factors, Superoxide Dismutase (SOD1), Carbonic anhydrase, Testosterone synthesis, Phagocytosis
Deficiency Condition
Endemic Goiter (Compensatory thyroid enlargement), Congenital Hypothyroidism / Cretinism (Permanent neurodevelopmental impairment), Maternal miscarriages Impaired immunity, Hypogonadism, Delayed wound healing, Alopecia, Loss of taste/smell (Anosmia/Ageusia)
Top Whole Food Sources
Kombu Kelp, Nori Seaweed, Atlantic Cod, Eastern Oysters, Iodized Table Salt, Greek Yogurt, Dairy Milk, Eggs Eastern Oysters, Beef Chuck, Crab, Pumpkin Seeds, Hemp Hearts, Chickpeas
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 —
Copper Balance Warning
— High zinc stimulates intestinal metallothionein which binds copper, risking microcytic anemia if copper is unsupplemented

Other Alternatives to Compare

Compare Iodine (Elemental I) vs. Calcium (Elemental Ca) → Compare Iodine (Elemental I) vs. Iron (Heme & Non-Heme) → Compare Iodine (Elemental I) vs. Magnesium (Elemental Mg) → Compare Iodine (Elemental I) vs. Potassium (Elemental K) → Compare Iodine (Elemental I) vs. Selenium (Elemental Se) → Compare Iodine (Elemental I) vs. Sodium (Elemental Na) → Compare Iodine (Elemental I) vs. Vitamin A (Retinol & Beta-Carotene) → Compare Iodine (Elemental I) vs. Vitamin B1 (Thiamine) → Compare Iodine (Elemental I) vs. Vitamin B12 (Cobalamin) → Compare Iodine (Elemental I) vs. Vitamin B2 (Riboflavin) → Compare Iodine (Elemental I) vs. Vitamin B3 (Niacin / Nicotinic Acid & Nicotinamide) → Compare Iodine (Elemental I) vs. Vitamin B5 (Pantothenic Acid) → Compare Iodine (Elemental I) vs. Vitamin B6 (Pyridoxal 5'-Phosphate / PLP) → Compare Iodine (Elemental I) vs. Vitamin B7 (Biotin / Vitamin H) → Compare Iodine (Elemental I) vs. Vitamin B9 (Folate & Folic Acid) → Compare Iodine (Elemental I) vs. Vitamin C (L-Ascorbic Acid) → Compare Iodine (Elemental I) vs. Vitamin D3 (Cholecalciferol) → Compare Iodine (Elemental I) vs. Vitamin E (d-Alpha-Tocopherol) → Compare Iodine (Elemental I) vs. Vitamin K1 (Phylloquinone) →