Red Tea Benefits Red tea is caffeine-free and has a soothing effect on the central nervous system. Red tea helps manage allergies like hay fever, asthma and eczema. Red tea, though red in color, is completely pure, natural and contains no additives, preservatives or colorants. Red tea increases the absorption of iron in the body. Red tea controls your appetite and so it is considered beneficial for weight loss..... PLUS a lot more. Did not have enough room for all the benefits.