Compared with other fields, nutritional science is understudied.

与其他领域相比，营养科学的研究还不够深入。

Instead, most nutritional science is based on observational studies that try to establish associations between particular foods or nutrients and diseases.

相反，大多数营养科学都基于观察性研究，试图建立特定食物或营养素与疾病之间的关联。

This is especially notable in the case of extreme diets (such as fruitarianism) advocated by some vegan bloggers or Instagram influencers with unorthodox approaches to nutritional science.

这一点在一些用非正统方法研究营养科学的纯素食博主或 Instagram 网红所倡导的极端饮食（如“果食主义”）的案例中尤其明显。

And if blending your produce can help you eat more of it, that's a good thing, said Kristina Petersen, an associate professor of nutritional sciences at Pennsylvania State University.

宾夕法尼亚州立大学营养科学副教授克里斯蒂娜彼得森说，如果混合农产品可以帮助你吃更多，那是一件好事。