Riina Raudsik is an Estonian doctor, populariser of medicine and advocate of alternative medicine. She has given lectures on topics related to human health, energetics, antidepressants, healthy nutrition, adequate water consumption, the importance of movement, the nature of inflammation in the body, the natural healing of the body, body physiology, biochemistry, the nature of energy production processes, etc. She has also written many articles and books on these topics aimed at a broader audience. Pilgrim Publishing House has published Raudsik’s successful book, Energy Crisis: The Body’s Alarm Clock (Energiakriis. Keha häirekell).