Comment by Shirobell on I Became The Wife Of The Monstrous Crown Prince - Chapter 110

If i remember correctly from the novel, turns out that the sailors on the ship was just having Vitamins Defficiency, that came from the lack of fruits and veggies they brought along the journey to Chang empire. Due to the idea of men cant have sweet stuff like fruits because they thought the best source of energy came from meat, so they only bring meat and some mushrooms along as their food stock.