Things that are culturally accepted as the norm may have a detrimental impact on our hormones. Yoghurt or baked beans for instance are low Gi, yet spike insulin. Tea, coffee and energy drinks contain caffeine of course which is a stimulant that affects cortisol, blood glucose, and thereby IGF-1/insulin.
Even fruit with its healthy image bears little resemblance to its natural derivatives, having been selected for its sweetness. It is a dessert; sugar!