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

Vitamin B1 (Thiamine) vs. Vitamin B7 (Biotin / Vitamin H)

Comparing 2 standards across 10 specifications. 10 key differences identified.

Comparing:
Vitamin B1 (Thiamine)
Vitamin B7 (Biotin / Vitamin H)
Vitamin B1 (Thiamine) →

Vitamin B1 is a water-soluble pyrimidine/thiazole vitamin acting as the Thiamine Pyrophosphate (TPP) coenzyme in pyruvate dehydrogenase, alpha-ketoglutarate dehydrogenase, and transketolase. Adult RDA is 1.2 mg (men) / 1.1 mg (women) (no Upper Limit established).

View full Vitamin B1 (Thiamine) spec sheet →
Vitamin B7 (Biotin / Vitamin H) →

Vitamin B7 is an essential sulfur-containing water-soluble vitamin serving as a prosthetic group for five carboxylase enzymes in gluconeogenesis, lipogenesis, and branched-chain amino acid catabolism. Adequate Intake (AI) is 30 µg/day (no Upper Limit established).

View full Vitamin B7 (Biotin / Vitamin H) spec sheet →

Specification Comparison Table

10 Parameters
Parameter / Spec
Vitamin B1 (Thiamine)
Vitamin B7 (Biotin / Vitamin H)
Nutrient Type
Water-Soluble Thiazole Vitamin Water-Soluble Ureido-Tetrahydrothiophene Vitamin
Tolerable Upper Limit (UL)
None Established (Rapid renal clearance of excess) None Established (No adverse effects recorded)
Chemical Forms
Thiamine Monophosphate, Thiamine Pyrophosphate (TPP / TDP, active coenzyme), Benfotiamine (Lipid-soluble synthetic) D-Biotin (Biologically active isomer), Biocytin (Biotinyl-lysine)
Primary Biological Function
Pyruvate dehydrogenase complex (Links glycolysis to Krebs cycle), Transketolase (Pentose Phosphate Pathway), Myelin neurotransmission Prosthetic group for Pyruvate Carboxylase (Gluconeogenesis), Acetyl-CoA Carboxylase (Fatty acid synthesis), Propionyl-CoA Carboxylase, Histone biotinylation
Deficiency Condition
Beriberi (Wet beriberi: high-output heart failure; Dry beriberi: peripheral neuropathy), Wernicke-Korsakoff syndrome Alopecia (Hair loss), Erythematous scaly periorofacial rash, Brittle nails, Neurological depression / hallucinations
Top Whole Food Sources
Pork Tenderloin, Sunflower Seeds, Nutritional Yeast, Enriched Grains, Black Beans, Flaxseeds Egg Yolk, Beef Liver, Salmon, Pork Chop, Sunflower Seeds, Almonds, Sweet Potatoes
Adult RDA / RDI
1.2 mg / day (Men) / 1.1 mg / day (Women) (+0.3mg during pregnancy) —
Thermolability & Alcohol Interaction
Degraded by alkaline pH and high heat cooking; alcohol blocks intestinal active ThTr-1 transport —
Adult Adequate Intake (AI)
— 30 µg / day (35 µg during lactation)
Raw Egg White (Avidin) Interaction
— Raw egg albumen contains avidin glycoprotein which binds biotin with Kd ~10^-15 M (the strongest non-covalent bond known), completely blocking absorption unless cooked

Other Alternatives to Compare

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