Generally, nutrients from food sources are more efficiently utilized by the body than isolated substances. For instance, fresh fruit and vegetable juice could be used to provide concentrated amounts of particular nutrients, such as vitamins A and C, to the diet. As another example, eating plenty of leafy green vegetables is a healthy option for those wishing to add calcium to the diet.
hello. I have recently started trying to eat better. I am in college and am currently in a nutrition class. everyone swears by coconut oil. but I do not understand. it has an incredibly high amount of saturated fat and hardly any monosaturated and polyunsaturated fats. while olive oil is the opposite. So why do so many people use olive oil? Also, when trying to lose weight is it best to completely cut out carbs even brown rice and whole wheat bread and substitute them for your cauliflower rice for example. also, does it really make a difference in the type of flour you us? I have been using whole wheat flour and cut out all purpose. But I have seen so many other kinds such as almond, buckwheat, coconut.
The need for several essential nutrients increases with age and sickness. This applies, for example, to vitamin C, vitamin D, magnesium, and iron. In 2017 the Norwegian Food Safety Authority proposed to revise the official maximum levels for vitamins and minerals in dietary supplements.  Their proposal introduced four different age categories with separate maximum intakes. Initially, the agencies proposed to revise the daily doses allowed in dietary supplements for folic acid, magnesium, calcium, vitamin C and D. At the same time, maximum rates were temporarily suspended for vitamins A, E, K, thiamine (B1), riboflavin (B2), niacin (B3), pantothenate (B5), pyridoxine (B6), cobalamine (B12), biotin, and for phosphorus, iron, copper, iodine, zinc, manganese, selenium, chromium, molybdenum, sodium, potassium, fluoride, chloride, boron and silicon. The upper limits for some nutrients may be changed in the future. Unfortunately, Norwegian nutrition "experts" will likely continue to limit allowable doses below those freely available in the US and even Sweden.
In addition to diet, exercise and other lifestyle factors can also play an important role in bone health. Smoking and drinking too much alcohol can increase your chances of developing osteoporosis, while weight-bearing exercise (such as walking, dancing, yoga, or lifting weights) can lower your risk. Strength or resistance training—using machines, free weights, elastic bands, or your own body weight—can be especially effective in helping to prevent loss of bone mass as you age.