That is a complicated question with no one single answer. But a good start is "More than the current government RDI"
Many Vitamin D researchers are recommending that adults take a MINIMUM of 2000 IU's per day and are petitioning the government to take action immediately!
But the 'Best' answer, is that you should get your Vitamin D levels checked and keep your blood levels within the "Optimum Range" as outlined by several different researchers and studies- with the main consensus being between about 50-80 ng/ml.
This blood level seems to be the optimum for good health and has been shown over and over again to have no ill effects.
5,000g
Spinach Contains no Vitamin D but, Milk does
Because children have a smaller reccomended daily allowence than adults, also they could fall ill, sometimes anyway!?! :) xxWater soluble vitamins such as Vitamin C are safe to overdose on as the kidneys can regulate their concentration with ease. Fat soluble vitamins such as Vitamin A and Vitamin D can be dangerous to overdose on.
That is true you do need vitamin D in your daily intake
Good Vitamin D SourcesVitamin D drops are a liquid form of vitamin D that can be used to administer a dose to infants, or that can be used for adults who might have difficulty swallowing solid pills or other supplements. Sometimes, the drops are preferred over pills because there is a higher concentration of vitamin D in the liquid. Vitamin D is very important to the body for the proper absorption of calcium. With too much or too little vitamin D, calcium does not behave properly and can result in low bone density in adults and a condition called rickets in infants. Calcium cannot properly be processed without vitamin D, so both are important to the health of the body.Vitamin D is one of the more unique vitamins. For most individuals, the largest source of vitamin D is the sun. Exposure to direct sunlight for just 15 to 30 minutes each day is enough to provide someone with the recommended daily allowance of vitamin D. Food based sources of vitamin D are rare, with oily fish like salmon and swordfish being the main providers. Processed foods are often fortified with vitamin D, as is seen with milk products so that the calcium in the milk can be properly absorbed by the body.There are certain situations where vitamin D drops might be necessary to supplement the vitamins gained from food and sunlight, or to prevent a serious deficiency. Individuals who live in extreme northern regions where there is limited sunlight each day might need a supplement. Similarly, those who do not regularly go into the sun each day could need to use drops. As a person grows older, the daily recommended allowance of vitamin D increases to help combat conditions like osteoporosis and decreased efficiency in the chemical conversion processes. In all of these instances, supplements like vitamin D drops can be used to compensate for low vitamin D levels.One concern about using vitamin D drops is the concentration of the vitamin in the liquid. Usually, only a single drop is required to exceed the daily recommended allowance of the vitamin. Taking too much vitamin D can lead to absorption of excess calcium into the bloodstream. Over time this excess calcium can cause calcification in the veins and arteries, possibly leading to critical problems like arrhythmia or stroke.
The body stores Vitamin D in tissue and can store 60 or even 90 days worth. A daily dose of 600 IU is recommended. Vitamin D is a fat-soluble vitamin so it is stored in fat tissue.
It is for overall good health and strong bones. It helps prevent osteoperosis but if taken in vitamin form can be overdosed so only take the recommended daily amount and not more.
How much your aloud. The RDA or recommended daily allowance, refers to the amount of the particular substance you should take in a 24 hour period. For instance, the recommended daily intake of vitamin C, is 60 mg. This means, that the average adults intake of vitamin C each 24 hours should be 60 mg.. Depending on the most recent research, these recommendations can change over time. For instance, vitamin E recommendations have decreased over the years, while vitamin D recommendations have increased. The recommendations are just guidelines for us common folk to follow. It is because some substances, when taken in excess, can cause health problems. The fat soluble vitamins (A, D, E for example), stay in your system longer and can accumulate faster, leading to a greater chance of toxicity. Water soluble vitamins, such as C, are passed though your system quite fast.
You will be fine with the adult amount. At 16, I take a full multi-vitamin every day with no side-effects, and I feel great. Beware not to take the synthetic vitamins though. Try to get herbal ones as much as you can as they are easier for the body to digest and deal with, more effective, and a lot safer.
The FDA[Federal drug administration USA]recommended daily allowance[RDA] of vitaminD is- (a) 200 IU(International unit) per day for children and adults<50 years old,(b) 400IU per day for adults> 50 years old (c)600-800 IUper day for the elderly> 70years old scientists and nutritionists believe that the doses in the RDA are not high enough. Good studies show that up to 10 times the recommended daily allowance is safe.According to the FDA ,2000IU is a safe dose for everyone ,except children under 1 year old.Studies ,however,have shown that adults taking doses up to 10,000 IU per day for five months didnot have any evidence of vitaminD overdose. Most experts agree that children and adults who stay out of sun require 800 to 100 IU daily. ultimately , the best dose for anyone needs to be determind with your doctor, but if your are healthy adult and not preegnant or brestfeeding woman ,you have three options : there are two types of vitamin D -(1) vitamin D2- Ergocalciferol, which comes from plants, (2) vitamin D3- Cholecalciferol, which comes from exposure to UV radiation and certain foods. Some studies have shown that D3 raises vitamin D levels in the bloodstream higher than D2 ,but D2 has been shown to be effective at preventing vitamin D deficiency at the right doses .The goods news is that everyone can use vitamin D2 and vitamin D3 to getball the benefits of healthy vitamin D levels in the bloodstream.
No. 2,000 IU is a very modest dose - which can be taken daily. However, vitamin D is a fat-soluble vitamin, and should not be taken in excess.
Milk does contain vitamin C. Milk is not considered a good source of Vitamin C. Milk contains between 0.85 and 2.75mg per 100g of milk. This is far below the recommended daily intake of 60mg per day.