Unhealthy eating habits, low physical activity, stress, emotional trauma, autoimmune diseases such as Rheumatoid Arthritis and chronic diseases such as Diabetes, Hypertension and Obesity are potential causes of a weak immune system.
Your immune system becomes weak as you age. It is prone to frequent illnesses and malnutrition as you progress to age above 65 years. However, some other factors such as an unhealthy lifestyle can also make it weak at a younger age.
When your immune system malfunctions, it begins producing antibodies that instead of fighting infections, attack the body's own tissues and damage it. It can lead to autoimmune diseases.
Vitamin C is safe and tolerated and is not believed to cause any serious adverse effects. But if high dose above 2000mg are consumed daily, it can lead to various side effects. These side effects include diarrhea, nausea, and vomiting, abdominal cramps.
It is hard to know whether you are getting enough Vitamin C. You may be deficient, if you are suffering from following symptoms:
Consuming five varied servings of fruits and vegetables a day can fulfil your daily requirement of Vitamin C. But you may need a Vitamin C supplement if you:
Zinc supplements are safe to use but if it is consumed in high doses above tolerable upper intake levels (i.e 40 mg per day) for a long time it can result in side effects. Excess Zinc can cause stomach pain, diarrhoea, nausea, vomiting, cramps, loss of appetite and a metallic taste in the mouth.
If you are suffering from symptoms such as weight loss, retarded growth, loss of appetite, impaired immune function, delayed healing of wounds, and fatigue, you are Zinc deficient.
No, you do not need to take a Zinc supplement if you are eating a variety of foods and have no health conditions. But, you surely need a Zinc supplement, if you: