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

Iodine (Elemental I) vs. Vitamin C (L-Ascorbic Acid)

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

Comparing:
Iodine (Elemental I)
Vitamin C (L-Ascorbic Acid)
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 →
Vitamin C (L-Ascorbic Acid) →

Vitamin C is a water-soluble electron donor and antioxidant essential for collagen proline/lysine hydroxylation, non-heme iron absorption, and immune phagocyte function. Adult RDA is 90mg (men) / 75mg (women), with a Tolerable Upper Limit of 2,000mg/day.

View full Vitamin C (L-Ascorbic Acid) spec sheet →

Specification Comparison Table

9 Parameters
Parameter / Spec
Iodine (Elemental I)
Vitamin C (L-Ascorbic Acid)
Nutrient Type
Essential Trace Halogen Element Water-Soluble Vitamin
Adult RDA / RDI
150 µg / day (220 µg pregnancy / 290 µg lactation) 90 mg (Men) / 75 mg (Women) (+35mg for smokers)
Tolerable Upper Limit (UL)
1,100 µg / day (Avoid Wolff-Chaikoff thyroid autoregulatory shutdown) 2,000 mg / day (Avoid osmotic diarrhea)
Chemical Forms
Iodide (I- / Potassium Iodide KI, Potassium Iodate KIO3 in iodized salt), Molecular Iodine L-Ascorbic Acid, Sodium Ascorbate, Calcium Ascorbate
Primary Biological Function
Constituent of Thyroxine (T4, 4 iodine atoms / 65% by weight) and Triiodothyronine (T3, 3 iodine atoms / 59% by weight) Prolyl/Lysyl Hydroxylase cofactor (Collagen), ROS scavenger, Carnitine synthesis
Deficiency Condition
Endemic Goiter (Compensatory thyroid enlargement), Congenital Hypothyroidism / Cretinism (Permanent neurodevelopmental impairment), Maternal miscarriages Scurvy (Collagen breakdown, capillary fragility, impaired wound healing)
Top Whole Food Sources
Kombu Kelp, Nori Seaweed, Atlantic Cod, Eastern Oysters, Iodized Table Salt, Greek Yogurt, Dairy Milk, Eggs Red Bell Pepper, Strawberries, Citrus, Kiwi, Broccoli, Brussels Sprouts
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 —
Thermolability
— Highly heat- and oxygen-sensitive (degrades rapidly with prolonged boiling)

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 D3 (Cholecalciferol) → Compare Iodine (Elemental I) vs. Vitamin E (d-Alpha-Tocopherol) → Compare Iodine (Elemental I) vs. Vitamin K1 (Phylloquinone) → Compare Iodine (Elemental I) vs. Zinc (Elemental Zn) →