Revista Lambda número 81 Us podeu subscriure a la revista Lambda per rebrela en format paper a casa vostra, aquí. Podeu consultar els números anteriors en paper al Centre de Documentació del Casal o bé en alguna de les biblioteques públiques que tinguin la revista. T'agradaria col·laborar amb la revista Lambda, fer articles, distribució...? Aquesta adreça de correu-e està protegida dels robots de spam.Necessites Javascript habilitat per veure-la. Utilitzem cookies pròpies i de tercers per millorar els nostres serveis. Your body's iron is mostly in hemoglobin. The relationship among vitamin B-12, folate and iron is a good example of the complex way in which some essential nutrients help keep your body healthy. Vitamin B-12 is indirectly responsible for raising your blood iron level to keep it in a healthy range. Talk to your doctor if you have questions about your need for iron and vitamin B-12. Your Need for Iron Iron is an essential mineral that's a natural part of many foods you eat.
The body of an average adult contains between 3 and 4 grams of iron, with about two-thirds of it in a compound called heme, combined with protein as hemoglobin in your red blood cells. Hemoglobin binds oxygen, carrying it through your circulation to all of your cells, which use it to fuel many basic biochemical processes that sustain life. Because of hemoglobin's ability to bind oxygen, your blood iron level is crucial for supporting the normal function of every cell in your body. Vitamin B-12 and Iron Vitamin B-12 activates an enzyme called methionine synthase that has many essential functions, including helping your body use folate, which is needed for production of new DNA during cell division. Normally, about 1 percent of the red blood cells in your circulation are replaced by new cells each day, so that their number always remains adequate to provide oxygen to all your cells, tissues and organs. If you don't consume enough vitamin B-12, usable folate can become low, slowing production of new red blood cells in your bone marrow.
Eventually, this problem can lead to low levels of iron in your blood as old red cells wear out and die but aren't effectively replaced. Healthy Levels In adults, blood levels of iron should be between 60 and 170 micrograms per deciliter, according to MedlinePlus. If you don't consume enough iron-rich foods, you might develop iron-deficiency anemia and low blood iron levels. But if your iron intake is adequate and you don't get enough vitamin B-12, you could develop a different type of anemia, called pernicious anemia, in which low B-12 levels indirectly cause low levels of iron and too few red cells in your blood. The recommended dietary allowance of vitamin B-12 is 2.4 micrograms daily, according to the Office of Dietary Supplements, which says that eating a healthy diet containing animal-based foods helps most people obtain enough of the vitamin. Sources Most meats, poultry and fish are good sources of vitamin B-12. For example, a 3-ounce serving of lean beef contains about 7 micrograms, while a similar serving of mackerel provides 16 micrograms.
The richest source is clams, with 84 micrograms in 3 ounces. Dairy products also contain some vitamin B-12 -- 8 ounces of skim milk provides about 1 microgram, with slightly less in cheese and eggs. Keeping your intake of iron in the recommended range of 8 milligrams for men and older women, and 18 milligrams for women who have menstrual periods, can also help your blood iron level in the right range. Good iron sources include most vegetables and fruits, along with nuts, meat and foods such as grain products that are fortified with iron. References Linus Pauling Institute: Vitamin B-12Linus Pauling Institute: IronOffice of Dietary Supplements: IronAnnual Review of Nutrition: New Insights Into Erythropoeisis -- the Roles of Folate, Vitamin B-12, and IronMedlinePlus: IronOffice of Dietary Supplements: Vitamin B-12 Photo Credits Siri Stafford/Photodisc/Getty Images Suggest a Correction List Accutane side effects by likelihood and severity.The following side effects are associated with Accutane:
Common side effects of Accutane: Infrequent side effects of Accutane: Rare side effects of Accutane:A total of 92 drugs (798 brand and generic names) are known to interact with isotretinoin.26 major drug interactions (236 brand and generic names)66 moderate drug interactions (562 brand and generic names) Show all medications in the database that may interact with isotretinoin. Type in a drug name and select a drug from the list. There are 3 alcohol/food interactions with isotretinoinThere are 5 disease interactions with isotretinoin which include:Side Effects of IsotretinoinIsotretinoin Consumer InformationDrug Interactions CheckerDisclaimer: Every effort has been made to ensure that the information provided by Multum is accurate, up-to-date and complete, but no guarantee is made to that effect. Multum's information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill, knowledge, and judgement of healthcare practitioners in patient care.
The absence of a warning for a given drug or combination thereof in no way should be construed to indicate that the drug or combination is safe, effective, or appropriate for any given patient. Multum Information Services, Inc. does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. Copyright 2000-2017 Multum Information Services, Inc. If you have questions about the drugs you are taking, check with your doctor, nurse, or pharmacist.Even when your vitamin B12 levels have not fallen below normal, you can be at risk for atherosclerosis and heart disease. Vitamin B12 is a water-soluble vitamin that is necessary for the production of red blood cells and also has an effect on neurological functioning and DNA. These processes in the body can affect the regulation of blood pressure. Vitamin B12 is found naturally in some foods and added to other processed foods. Individuals who experience even slightly reduced levels of vitamin B12 also tend to have elevated homocysteine levels.
Elevated levels of homocysteine are associated with heart disease and stroke. According to the American Heart Association, plasma homocysteine has been associated with high blood pressure in large community studies. In evidence taken from the Framingham Heart Study and published in 2003, researchers found that individuals with hypertension had elevated homocysteine levels. You can reduce your potential for increased homocysteine levels by getting enough vitamin B12. In a study published in 2006 in "Current Atherosclerosis Reports," researchers evaluated the role of increased levels of homocysteine in the blood with the promotion of atherosclerosis, commonly caused by a vitamin B deficiency. Elevated levels of homocysteine increased the risk of cardiovascular disease and cerebral vascular disease. Treatment of this disorder is primarily through the supplementation of folic acid, vitamin B6 and vitamin B12. Atherosclerosis causes hardening of the arteries and an increase in blood pressure.
Supplementation with vitamin B12 can help to reduce both. Supplementation with vitamin B12 occurs in weight-loss clinics and among individuals who believe that they may be deficient because of poor diet or self-diagnosis. , while some clinics offer vitamin B12 as part of their programs, unless you have a deficiency, it is not likely to help. However, according to Acu-Cell Nutrition, when you receive an overabundance of vitamin B12, it can result in a severe calcium deficiency. According to the University of Maryland Medical Center, people whose calcium is low are at higher risk for developing hypertension. This means when vitamin B12 is taken to excess, you risk decreasing your calcium level and increasing your risk of hypertension. Are There Advantages of Sublingual Vitamin B12? Does Sublingual B12 Really Work? Does Taking B-12 Vitamins Help Raise Your Blood Pressure? What Is Sublingual B12? Can You Take B12 and B6 While on Blood Pressure Medicine? Sublingual Vitamin B12 vs. Injectable B12