What food to eat is helpful to the health of sub-healthy people?

You can eat some Ejiao, because Ejiao is suitable for patients with physical weakness, postpartum, chronic illness, deficiency of both qi and blood and sub-health people. According to the theory of traditional Chinese medicine, "healthy qi exists inside, and evil cannot be done". Ejiao can obviously promote the secretion of cytokines by white blood cells, promote lymphocyte proliferation, adjust the proportion of lymphocyte subtypes, and promote the proliferation and differentiation of hematopoietic stem cells. By improving cellular immunity.