Let's take a look at some other popular sources of energy:
I AM AN OVER EATER recommends consulting your physician before using any dietary supplements. Caffeine
(Sources: U.S. National Library of Medicine; Mayo Clinic) SOURCES Found in coffee, tea, soft drinks, chocolate, kola nuts and certain medicines PURPOSE Stimulates the central nervous system DOSEAGE Up to 400 mg of caffeine/day appears to be safe for most healthy adults
SIDE EFFECTS Insomnia, nervousness, restlessness, irritability, headaches or dizziness, upset stomach, fast heartbeat or abnormal heart rhythms, dehydration, muscle tremors INTERACTIONS Ciprofloxacin (Cipro) and norfloxacin (Noroxin)
Carnitine (Source: National Institutes of Health, Office of Dietary Supplements) SOURCES Found in animal products like meat, fish, poultry and milk L-carnitine, acetyl-L-carnitine and propionyl-L-carnitine are available over-the-counter as dietary supplements PURPOSE Plays a critical role in energy production DOSAGE Body makes sufficient carnitine to meet the needs of most people Some may be deficient for genetic or medical reasons; please see your physician to determine if you are deficient Healthy children and adults do not need to consume carnitine from food or supplements SIDE EFFECTS At doses of approximately 3 g/day, carnitine supplements can cause nausea, vomiting, abdominal cramps, diarrhea and a “fishy” body odor Rarer side effects include muscle weakness in uremic patients and seizures in those with seizure disorders INTERACTIONS Carnitine interacts with pivalate-conjugated antibiotics such as pivampicillin that are used in the long-term prevention of urinary-tract infections Guarana (Source: U.S. National Library of Medicine; Natural Medicines Comprehensive Database) SOURCES Plant named for the Guarani tribe in the Amazon Other names include Brazilian Cocoa, Cacao Brésilien, Guarana Seed Extract, Guaranine, Paullinia cupana, Paullinia sorbilis and Zoom PURPOSE Contains caffeine as well as theophylline and theobromine, which are chemicals similar to caffeine Effectiveness based on scientific evidence for Guarana is “insufficient evident to rate effectiveness” for anxiety, mental performance, weight loss, malaria, diarrhea, fever, headaches, heart problems, improvement of exercise endurance, improvement of short-term, high-intensity performance and power, increasing blood pressure for people who have low blood pressure, chronic fatigue syndrome (CFS), joint pain, fluid retention and other conditions DOSAGE At this time there is not enough scientific information to determine an appropriate range of doses for guarana Guarana is likely safe for most adults when consumed in amounts commonly found in foods Guarana is possibly safe when taken by mouth in medicinal amounts for a short time Guarana is possibly unsafe when taken by mouth in high doses for a long time Guarana is likely unsafe and even deadly, due to its caffeine content, when taken by mouth of injected in very high doses Doses greater than 250-300 mg daily have been linked to side effects In a typical dose, side effects may include insomnia, nervousness and restlessness, stomach irritation, nausea, vomiting, increased heart rate and blood pressure, rapid breathing, tremors, delirium and diuresis. In a large dose, side effects may include headache, anxiety, agitation, ringing in the ears, pain when urinating, stomach cramps and irregular heartbeat INTERACTIONS Guarana interacts severely with stimulant drugs such as amphetamines, cocaine and ephedrine Guarana interacts moderately with Adenosine (Adenocard); antibiotics (Quinolone antibiotics) such as ciprofloxacin (Cipro), enoxacin (Penetrex), norfloxacin (Chibroxin, Noroxin), sparfloxacin (Zagam), trovafloxacin (Trovan) and grepafloxacin (Raxar); Cimetidine (Tagamet); Clozapine (Clozaril); Dipyridamole (Persantine); Disulfiram (Antabuse); Estrogens; Fluvoxamine (luvox); Litium; medications for asthma (Beta-adrenergic agonists); medications for depression (MAOIs); medications that slow blood clotting (Anticoagulant/Antiplatelet drugs); Nicotine; Pentobarbital (Nembutal); Phenylpropanolamine; Riluzole (Rilutek); Theophylline; Verapamil (Calan, Covera, Isoptin, Verelan) Guarana interacts minimally with alcohol, birth control pills, fluconazole (Diflucan), medications for diabetes, mexiletine (Mexitil), terbinafine (Lamisil), Guarana also interacts with herbs and supplements
Taurine (Source: Mayo Clinic) SOURCES Found naturally in meat, fish and breast milk PURPOSE Supports neurological development and helps regulate the level of water and minerals in the blood Some studies suggest taurine supplementation may improve athletic performance Other studies suggest when combined with caffeine, mental performance is improved DOSAGE Up to 3,000 mg/day of supplemental taurine is generally considered safe SIDE EFFECTS Little is known about the effects of heavy or long-term taurine use
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