Beeline 550mg Vitamin C & Zinc Time Release Tablets (60). Double action immune support.. Sustained release technology, which ensures the gradual release of nutrients throughout the day. Vitamin C cannot be stored for any length of time in the body, so regular intake is important. Beeline Vitamin C + Zinc Time Release can replace vitamin C lost through colds and flu.. Zinc has been shown to combat cold viruses and speed up the healing of infections.