Tea And India: Meet our Hibiscus petals, a herbal tea that is rich in vitamin C-a vitamin used to boost the immune system and help stave off cold and flus. Health Benefits: Caffeine-free, this tea is great for soothing sips through the day or at bedtime. Known to calm your colds and cramps, this healing tea boosts your nervous system. The antibacterial and antimicrobial properties can be very effective in treating colds and other infections, clearing skin irritations, and healing wounds.