Department of Toxicology, Universidad de La Laguna, La Laguna, Tenerife, Canary Islands, Spain.
Health Inspection and Laboratory Service, Canary Health Service, S/C de Tenerife, Tenerife, Canary Islands, Spain.
Biol Trace Elem Res. 2021 Jan;199(1):382-388. doi: 10.1007/s12011-020-02151-6. Epub 2020 Apr 20.
Tofu is one of the most consumed soybean products. Currently, tofu is consumed in vegan and vegetarian diets to avoid meat. However, it is necessary to determine the content of essential elements to assess the dietary intake. Essential elements (Na, K, Mg, Ca, Mn, Zn, Fe, Cu, Mo, Co) were determined in 130 samples of tofu by ICP-OES (inductively coupled plasma optical emission spectroscopy). The highest element content was found in flavoured tofu; the most notable were Na (2519 mg/kg wet weight) and Fe (19.5 mg/kg ww). Consumption of 200 g/day of flavoured tofu by adults would mean a high contribution of Cu (46.9% women, 38.1% men), Fe (55.7% women, 65.0% men) and Na (25.2% adults) to its AI (adequate intakes) sets by the EFSA (European Food Safety Authority). Natural tofu would mean a remarkably Mn contribution (50% adults) to the AI. Tofu could be an important source of essential elements such as Mg, Mn, Na, Cu and Fe.
豆腐是最常食用的大豆制品之一。目前，豆腐在纯素和素食饮食中被消费，以避免食用肉类。然而，有必要确定必需元素的含量，以评估饮食摄入。通过电感耦合等离子体光学发射光谱法（ICP-OES）对 130 份豆腐样品中的必需元素（Na、K、Mg、Ca、Mn、Zn、Fe、Cu、Mo、Co）进行了测定。风味豆腐中的元素含量最高；最值得注意的是 Na（2519mg/kg 湿重）和 Fe（19.5mg/kg ww）。成年人每天食用 200 克风味豆腐，这意味着欧盟食品安全局（EFSA）设定的其适宜摄入量（AI）中，Cu（女性 46.9%，男性 38.1%）、Fe（女性 55.7%，男性 65.0%）和 Na（25.2%成年人）的摄入量会很高。天然豆腐则会对 AI 产生显著的 Mn 贡献（50%成年人）。豆腐可能是 Mg、Mn、Na、Cu 和 Fe 等必需元素的重要来源。
