Yes, they do. However, understand that these natural cold and flu remedies are not really “curing” anything . If you see a product claiming anything along those lines, that is a red flag. But what many of these products do – and homeopathic remedies  do not fall into this category as they’re completely worthless – is simply boost your immune system with vitamins and sometimes additional minerals or phytonutrients. In fact, many of them are not unlike a potent multivitamin. The studies on “curing” colds with natural remedies are inconclusive, but studies have shown time and again that vitamins like C, the B-complex, and many other supplemental nutrients absolutely have immuno-strengthening properties. That’s why I recommend always taking steps to boost your immune system on a daily basis, whether you’re sick or not. Don’t wait until you feel the first itch of a sniffly nose to begin boosting your immune system. Prevent what you can before you even get it.
In general, the core factors for a strong, healthy immune system are:
– Regular, if not daily, exercise
– Multivitamin  supplementation
– Fish oil  supplementation
– A clean diet based around fresh produce and whole foods
– Avoidance of sugar
– Stress management
– Daily sunshine
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