A few years ago, I was taking Nutribiotic grapefruit seed extract daily and I never got sick. For financial reasons, I unfortunately had to give it up but a few months ago, I returned to buying it. I noticed the taste was pretty different than before. Originally, it was overwhelmingly bitter. Now it had a sour, tangy taste. It wasn't just one bottle - it's every bottle I've bought since. That wouldn't bother me at all but I've still been susceptible to the colds and flus going around. Does anyone know whether Nutribiotic did something that weakened their original grapefruit seed extract?