Side-by-Side Comparison
Essential Vitamins & Minerals
Potassium (Elemental K) vs. Vitamin B3 (Niacin / Nicotinic Acid & Nicotinamide)
Comparing 2 standards across 10 specifications. 10 key differences identified.
Comparing:
Potassium (Elemental K)
Vitamin B3 (Niacin / Nicotinic Acid & Nicotinamide)
Potassium is the primary intracellular cation (140 mEq/L intracellular vs 4 mEq/L extracellular), maintaining the cellular resting membrane potential via the Na+/K+-ATPase pump and regulating vascular tone. Adequate Intake (AI) is 3,400 mg (men) / 2,600 mg (women).
Vitamin B3 comprises nicotinic acid and nicotinamide, precursors to NAD+ and NADP+ coenzymes central to over 400 enzymatic cellular reactions and DNA repair by PARP enzymes. Adult RDA is 16 mg NE (men) / 14 mg NE (women), with a Tolerable Upper Limit of 35 mg/day.
Specification Comparison Table
10 Parameters| Parameter / Spec | ||
|---|---|---|
|
Nutrient Type
|
Essential Macromineral / Major Intracellular Electrolyte | Water-Soluble Pyridine Vitamin |
|
Tolerable Upper Limit (UL)
|
None Established (Whole foods; healthy kidneys clear excess; renal impairment requires clinical restriction) | 35 mg / day (Supplemental nicotinic acid; prevents prostaglandin flushing) |
|
Chemical Forms
|
Potassium Citrate, Potassium Chloride (KCl / Salt substitute), Potassium Gluconate | Nicotinamide (Niacinamide), Nicotinic Acid, Nicotinamide Riboside (NR), Nicotinamide Mononucleotide (NMN) |
|
Primary Biological Function
|
Na+/K+-ATPase resting membrane potential (-70mV), Cardiac myocardial repolarization, Endothelial nitric oxide vasodilation (lowers blood pressure), Blunts sodium-induced fluid retention | NAD+/NADH redox electron carrier in glycolysis/TCA cycle, NADP+/NADPH reductive biosynthesis, PARP-1 DNA repair, Sirtuin activation |
|
Deficiency Condition
|
Hypokalemia (Serum K+ < 3.5 mmol/L): Cardiac arrhythmias (U-waves, ventricular tachycardia), Muscle weakness, Ileus, Hypertension | Pellagra ('The 4 Ds': Diarrhea, Dermatitis on sun-exposed skin, Dementia, Death) |
|
Top Whole Food Sources
|
Baked Russet Potato (with skin), Orange Sweet Potato, Spinach, Bananas, Atlantic Salmon, Black Beans, Hass Avocado, Coconut Water | Chicken Breast, Canned Tuna, Salmon, Beef, Turkey, Peanuts, Brown Rice, Shiitake Mushrooms |
|
Adult Adequate Intake (AI)
|
3,400 mg / day (Men) / 2,600 mg / day (Women) (WHO Target: >3,510 mg/day) | — |
|
Dietary Sodium-to-Potassium Ratio
|
Ancestral human ratio was 1:4 (Na:K); modern Western diets average 2:1, significantly contributing to hypertension | — |
|
Adult RDA / RDI
|
— | 16 mg NE / day (Men) / 14 mg NE / day (Women) (NE = Niacin Equivalents) |
|
Tryptophan Biosynthesis Pathway
|
— | 60 mg of dietary amino acid L-tryptophan converts endogenously into 1 mg of niacin (1 NE) |
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