Article: The doctor will administer a 25 hydroxy-vitamin D blood test.  This test is a good idea for anyone who is homebound, has dark skin or is at risk for osteoporosis. Lighter skin produces more vitamin D after extended exposure to sunlight. Darker skinned people need 5 to 10 times more sunlight to produce healthy vitamin D levels. For adults, the recommended daily value of vitamin D is 4,000 International Units (IU) (four thousand). Being deficient in vitamin D is actually a pretty common occurrence. Generally, you just need to spend a bit more time in the sun or eat more vitamin D-rich foods. However, some medicals conditions can affect how your body absorbs vitamin D, which means that you might need to take supplements to keep your vitamin D levels normal. These conditions include:  Cystic fibrosis Crohn’s disease Kidney disease Celiac disease It is important to keep in mind that supplements are just that—they supplement your diet if you cannot get enough of the nutrient by eating vitamin D-rich food. Before you begin taking vitamin D supplements, try altering your diet a little to increase your vitamin D intake naturally, rather than through supplementation.  A cup (237 ml) of fortified milk provides about 30 percent of your daily value. 3 oz. (85 g) of salmon or mackerel provides about 100 percent of the daily value. 3 oz. (85 g) of canned tuna provides about 40 percent. Eggs, liver and fortified cereals can provide about 10 percent of your daily value. As mentioned in the previous step, it is advisable to try to alter your diet before you begin thinking about taking supplements. One of the more efficient ways to get the vitamin D you need is by consuming vitamin D fortified foods and beverages.  The most commonly fortified product is milk. Look at your carton of milk to make sure that it is enriched with vitamin D before you buy it. Other foods that are commonly fortified with vitamin D include cereals, orange juice, and some yogurts. Your body is able to absorb vitamin D when you spend time out in the sun, exposed to UV rays. In fact, many people meet their vitamin D needs simply by living in places that are sunny. However, it is important to keep in mind that UVB radiation cannot go through glass, so if you sit in the sun while inside, your body will not be absorbing any vitamin D. For this reason, try to spend at least 5 to 30 minutes outside in the sun without any sunscreen on. After this time, you should put sunscreen on to protect yourself from skin cancer. If you take too much vitamin D each day, you could actually cause the calcium levels in your blood to skyrocket. However, it is important to keep in mind that vitamin D overdoses are rarely caused by staying in the sun too long or eating too much vitamin D-rich foods; most overdoses come taking too many vitamin D supplements. Signs that you are taking too much vitamin D include:  Being very constipated. Experiencing nausea. Feeling confused. Developing kidney stones. Developing an abnormal heartbeat. Vitamin D supplement absorption can potentially also be dangerous for people with lymphoma, sarcoidosis or histoplasmosis.
Question: What is a summary of what this article is about?
Make an appointment with your doctor if you think you may have a vitamin D deficiency or insufficiency. Be aware of certain medical conditions that may predispose you to needing more vitamin D. Try to supplement your vitamin D through food, if possible. Buy vitamin D fortified products. Make sure to spend time out in the sun to get adequate amount of vitamin D. Do not take too much vitamin D, as taking too much vitamin D can be toxic. Check that you are not at risk for kidney disease or hardening of the arteries.

Problem: Article: The tie rods are the connection between your steering system and your wheels. The rod ends are L-shaped parts sometimes found near the inside of the wheel. It's a good idea to look at your car's manual and/or at some pictures on the internet to get a sense of what tie rod ends look like and where exactly they are located on your specific car. Between the tie rod and each tie rod end is a nut that holds it in place. You'll need to loosen this nut with a wrench.  Be aware that on some vehicles, the driver's side lock nut may be threaded counterclockwise, while the passenger side is threaded clockwise.  Depending on your steering system, there may also be a clamp that needs to be removed at each end to make sure the bellows boot is not sticking to the inner tie rod. Consult your manual for details. If it has been a long time since you had an alignment, the threaded parts may be stubborn and require some lubrication, such as WD40, in order to make them turn. Depending on the type of steering you have, there are two different ways you can adjust your toe.  If you have rack and pinion steering, you should turn the inner tie rod itself. Spinning the rod will adjust the toe in or out.  If you have a parallelogram linkage system, there will be adjusting sleeves that you can turn to adjust your toe. These sleeves can be damaged by this process, so be careful. There are special tools for rotating tie rods which can prevent damage.  Whichever system you have, make sure to keep in mind that the change you are making to the toe will be distributed across two wheels. Each tie rod should be adjusted 1/2 of the total desired amount of change in or out. Tighten your nuts (and clamps, if applicable) back up. Then, recheck the toe using the same procedures you followed in part 2. Readjust as necessary. Unless you are well practiced at this, there may be a certain amount of trial and error to get this right. Take the car for a drive to verify that any obvious alignment issues have been corrected (e.g. that the car does not pull to one side or vibrate excessively). If your alignment problems persist, you may have a problem that requires a professional mechanic.
Summary: Locate your tie rod ends. Loosen the lock nuts. Make your adjustments. Re-check the toe. Test drive the car.

Dermatologists are experts on skin, nails, and hair diseases; they can let you know if you have any skin conditions that would require treatment. Your primary care doctor can recommend a dermatologist to you, or you can find one online. The American Academy of Dermatology is also a good resource, helping to match people with dermatologists in their area.  Exfoliation removes the top layer of dead skin cells from your face. If you have acne, open cuts, or burnt skin, consult a dermatologist before trying an exfoliation treatment. Look for board-certified dermatologists. This certification indicates that they have completed medical school, have undergone a three-year residency in dermatology, and have passed an  exam through the American Board of Dermatology. If you experienced discomfort when you tried to exfoliate, let your dermatologist know. If you have a rash, blemish, or bump that isn't going away, bring this up during your appointment. The dermatologist can also let you know if any moles that you may have look troubling. Bring information about your medical history to your appointment, including any allergies you may have or medications that you have been using. Be prepared with a pen and notepad so that you can take note of the doctor's advice. For extreme cases, your dermatologist may suggest a chemical peel for exfoliation. High pH levels in chemical peels can help prevent skin irritation and tissue damage, along with making moisturizers and anti-aging treatments more effective.
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One-sentence summary --
Find a dermatologist. Express your concerns. Learn about alternative treatments.