So Much Things About Food supplements You Should Know

Ideally, a healthy and varied diet would provide your body with all the nutrients it needs. In some cases, however, food is grown in depleted soils or artificially under lights in hothouses. For example, selenium content in soils is varied and regional. New Zealand soils are quite low in selenium, as are parts of Australia, South Africa and North America, but it is important as an antioxidant and in supporting Vitamin E in your body. Antioxidants are certain minerals and vitamins, which are found in food sources. There are now many substances available from both natural and synthetic sources. Many (and certainly not all) of them can mimic the properties of natural antioxidants. A good rule of thumb is to see if the ingredients included in an antioxidant supplement are part of the natural human diet. If they are not, for example, if they come from tree bark, then do you thin) it would be appropriate to add them to the human food chain? Some studies suggest not. But, remember, one dose of antioxidants will not give you a healthy, youthful body fore\ They must be continually replaced in your diet to keep pace with free radical production. a diet laden with fresh, unprocessed wholefoods is essential.

Vitamin and Mineral Supplements

Many people today take vitamin products. There is no doubt that many offer nutritior insurance. However, studies have shown that some supplements are poorly digested and ix through the body without much benefit. We have both taken supplements over the years f all sorts of reasons. Often we relied on health professionals or pharmacy assistants to advi us as to which supplements we should take and how often. We placed our health in the han of people we didn’t even know and who may have had little idea what our bodies neede By educating yourself and continuing to learn about supplements you will, over time, mal more sophisticated decisions about which ones to take and how to optimise your diet wil quality supplements. The responsibility lies in your hands.

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Measures to alleviate jet lag

 Certain food constituents seem to have effects on rhythm adjustment. A high carbohydrate low protein meal, facilitating brain uptake of tryptophan and its conversion to serotonin, may induce drowsiness and sleep. On the other hand, a high protein low carbohydrate meal, which enhances tyrosine uptake and convertsion to noradrenaline, increases levels of arousal. Moreover, programmed use of theophylline and caffeine can speed rhythm readaptation and help to raise arousal levels in the morning. However, although studies on military personnel consuming such diets reported reduced sleep disturbance and less subjective feelings of fatigue in the days immediately after a transmeridian flight compared with controls, a clear link between diet and jet lag has not been formally established. Two studies have investigated the effects of light treatment on sleep patterns after flights. In the former, 19 subjects returning to the United States from Oriental or South Pacific localities (advance shifts of 6.5 to 10 hours) were instructed to expose themselves to either bright white light (2000 lux) or dim red light (<100 lux) for 2 or 3 hours on awakening in the morning for 3 days.” No differences were found between the group means for any sleep measure, but exposure to bright light early in the morning appeared to facilitate the consolidation of sleep into a single night-time episode.In the latter, four subjects were polysomnographically recorded before and after a flight from Tokyo to San Francisco (8 hour advance).” In San Francisco, the subjects were requested to go bed at 2300 hours and wake up by 1000 hours and were exposed for 3 consecutive days to either bright ( > 3000 lux) or dim ( <500 lux) light for 3 hours starting at 1100 hours (0300 hours Tokyo time). The bright light treatment seemed to be effective in accelerating circadian re-entrainment.However, the sparse number of field studies and the small sample population considered do not yet allow a clear judgment on the beneficial effect of bright light treatment for jet lag.61 In fact, the Consensus Report for Light Treatment for Sleep Disorders concluded that “much remains to be learned before procedures can be developed that are at once effective, reliable, and practical. For this to happen, optimal combinations of several light exposure parameters must be first defined and tailored to specific flight situations”.

Possible Mechanisms for Suppression of Testosterone Concentrations with Long Term Exercise

In female athletes menstrual disturbances have been found in association with lower bone density particularly at trabecular sites.Furthermore, stress fractures seem to be more common in women with amenorrhoea or oligomenorrhoea with a relative risk that is between two to four times greater than that of their eumenorrhoeic counterparts. There are few studies investigating the relation of testosterone levels to bone density and stress fracture risk in young male athletes. A recent case report described the clinical features of a 29-year-old male distance runner who presented with a pelvic stress fracture, greatly decreased bone density and symptomatic hypogonadotropic hypogonadism." Using this case as an index, the authors hypothesised that exercise– induced hypogonadotropic hypogonadism could be identified in male athletes by the presence of one or more specific risk factors which included the presence of sexual dysfunction, a history of fracture, and the initiation of endurance exercise before age 18 Years.

They compared concentrations of free testosterone and luteinising hormone in 15 male runners with one or more of the above risk factors and 13 runners with none of the risk factors. Only one of the runners in the first group was identified as having primary hypogonadism and there was no significant difference between groups for hormone concentrations. Bone density, however, was not measured in these runners and correlated with testosterone concentrations. From a clinical perspective, it is important to clarify that although some male athletes do present With reduced testosterone concentrations, these concentrations are generally still within the normal range for adult men. Therefore, detrimental effects on bone density may not be as dramatic as those described for women with athletic amenorrhoea in whom oestradiol concentrations are well below normal.