Wide variety of nutritional supplements is available in the market that can be brought over the counter without any prescription. Though these supplements are perceived as safe by the public but one should always take due care and consideration before using them. Supplements do have side effects if they are not selected properly and cautiously. There are various factors that play a major role while selecting a supplement as per your needs and requirements.

It is said that excess of everything is bad; it also holds true for nutritional supplements. Various researches have shown that side effects of various supplements are associated with high dosages and topical application. It is always suggested to take multivitamins in moderation as its overdose can pose various problems. As for instance too much Vitamin A causes diarrhea, nausea and headache whereas too much vitamin D and iron results in damage to the kidney.

Some of the supplements side effects are also triggered by any pre existing health conditions, treatment or medical history. Family history of blood pressure, diabetes, asthma and others should be well considered before consuming any health supplement so as to prevent various harmful side effects. It is always better to consult your doctor before starting any supplement and in case of medical history it becomes even more essential. So just make a thorough research before selecting a supplement so as to gain maximum benefits and to avoid any annoying side effects.