It is just the convention in English to apply past tense only once. I care, I cared I do care, I did care I took care, I have taken care in all instances the past tense is applied only once, at the...
Schisandra fruit contains at least 30 different lignans. Lignans, which are sometimes described as phytoestrogens (plant-derived compounds with estrogen-like activity), are known to have...