NU FS305 Lecture Notes - Lecture 10: Biotin Deficiency, Vitamin B12 Deficiency, Pantothenic Acid
21 Jun 2017
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Document Summary
Not linked together (unlike amino acids or tg) =quantity of component absorbed and utilized from a food. Actual amount convert to bioactivity in the body. : git microbiome extra reserve to synthesis vitamins. Each nutrient is interacting in all different parts of the metabolic pathways. Missing one or too much of one will cause imbalance. Whole range of hormones, thyroids, steroids that regulate. : type; synthetic supplement fortified product (eg. cereal) natural food (eg. fruit) Processes include: heat treatment (steaming, boiling, irradiation, pasteurization) Prolonged heat losses of water soluble vitamins. Storage: freezing, thawing, temperature, moisture, ph, product packaging (vacuum, light (degrades b2), map) : affect absorption, metabolism, and excretion eg. iron and vitamin c. Beneficial dose (rdi) (nutritional role) vs hazardous dose (tul) (allergen/antigen/carcinogen) Tolerable upper intake levels set (interfere with the metabolism of other nutrients) Circulate freely in water-filled parts of the body. Possible to reach toxic levels when consumed from supplements.
