advanced nutrition 2

Thiamin

B1

Riboflavin

B2

Niacin

B3

Thiamin RDA

male- 1.2 mg/d & female- 1.1mg/d

Riboflavin RDA

male- 1.3mg/d & female- 1.1mg/d

Niacin RDA

male- 16mg/d & female- 14mg/d

Vit B6 RDA

1.3mg

Iodine RDA

150 ug/d

Thiamin UL

NO UL

Riboflavin UL

No UL

Niacin UL

35 mg/d

Vit B6 UL

100mg

Iodine UL

1100ug/d

Thiamin dietary sources

Meat (pork), green veggies (peas, asparagus, okra), whole/enriched/fortified grains, legumes, yeast, wheat germ

Riboflavin dietary sources

green veggies, whole/enriched grains, milk/dairy, legumes. light sensitive!

Niacin dietary sources

Meat (fish), enriched grain products, cereals, legumes, coffee + tea

Vitamin B6 dietary sources

meat/fish/poultry, starchy veggies, non-citrus fruit (bananas), nuts, cereals

Iodine dietary sources

seafood, seaweed, iodized salt, milk (iodophores used on utters), bread (dough conditioners)

thiamin toxicity

NONE!

riboflavin toxicity

NONE!

niacin toxicity

flushing, hepatotoxicity, itchy skin, heart burn, nausea, liver damage

Vitamin B6 toxicity

sensory + peripheral neuropathy, unsteady gate, parethesia, impaired tendon reflexes

Iodine toxicity

Increase TSH, hypothyroidism risk, Grave’s Disease, thyroid adenomas/thyroiditis, weight loss, increase heat production, tachycardia, muscular tremor, irritability, nervousness, exophthalmos.

how is most thiamin transported

in RBCs as TPP

how is riboflavin transported

bound to albumin or globulins

most flavoproteins are

 

oxidizing agents (accept pair of e- + 2H+

2 structures of niacin

Nicotinamide + Nicotinic Acid

population at risk for niacin

malabsorptive disorders, corn based diet, sorghum based diet

thyroid hormone synthesis, iodide is transported ___ into thyroid cells via ___

actively, Na+

how is niacin transported

primarily as nicotinamide in the blood

how is B6 transported

albumin

how is iodine transported

binding proteins, tight binding, slow turnover