11/4/13 Lecture 24 Lecture 25 on Moodle 11/6Red Bull claims to “give you wings” because of ingredients like B-vitamins and Taurine, Caffeine = 80 mg (Coke = 35)In Sydney Summer Olympics (2000):>1400 of 2700 athletes were taking multivitamin supplements in the 3 days before competing(Also using a lot of asthma medication, anti-inflammatories, etc)Vitamins and minerals contain no energy, but they play key in production of energyVitamins and minerals = micronutrientsUnlike CHO, PRO, fat (and water), gram tons of grams neededMilligrams (grains of sault) or micrograms, 1 g = paperclip; are needed Minerals are elements, e.g. sodium, iron, phosphorus Vitamins: 2 types:Water- soluble vitamins, and fat-soluble vitamins, (A, D, E, K)Fat soluble vitamins are stored in liver, Stored for weeks/months, toxic in very large quantities Water-Soluble vitamins: there’s B vitamins, and vitamin CWater-soluble vitamins NOT stored in large quantities, Must be eaten regularly Vitamin C is stored in the liver, but it is limited, can go 2-3 months without eating it B-vitamins:Thiamine (b1), Riboflavin (b2), niacin (B3), pyridoxine (b6), biotin, pantothenic acid energy productionfolate (B9), cyanocobalamin (b12 red blood cell productionThiamine: coenzyme forms acetyl CoAPantothenic acid is part of acetyl CoANiacin and riboflavin are coenzymes critical for oxidative energy production. Vitamin B deficiency: Lethargy, fatigue, intolerance to exerciseKids: failure to growBeri-beri (Singhalese) means “I can’t, I can’t”Key points so far.1. B-vitamins contains no energy but critical to produce energy2. Oxidative production of ATP needs all of the B-vitamins 3. Deficiencies in ANY B-vitamins problem with energy production4. Fatigue is major symptomMore B-vitamins if you are an athlete? Should RDA for B-vitamins be “scaled” to energy intake?Someone expending 4000 kcal/day does this person need more B-vitamins?Couch potato 2000 kcal No, demonstrated need for more B-vitamins E.g. (car oil and gas) recycledWill they harm you? Probably not Energy Drinks: 5-hr energy, Red Bull, etc. contain a lot of B-vitamins Is this why they
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