Scientists have developed a breakthrough food supplement that could help save honeybees from devastating declines. By engineering yeast to produce six essential sterols found in pollen, researchers provided bees with a nutritionally complete diet that boosted reproduction up to 15-fold. Unlike commercial substitutes that lack key nutrients, this supplement mimics natural pollen’s sterol profile, giving bees the equivalent of a balanced diet.

TL;DR: Bees need balanced nutrition and we figured out how to make healthy bee food.

That's awesome! And the paper is open access :)

Beekeepers provide colonies with pollen substitutes, but these feeds do not sustain brood production because they lack essential sterols found in pollen.

So they were being starved by the bee farmers. Got it.

It's a shame that it's honeybee research. In Colorado one of our major pollinator ecology issues is that honeybees aren't native and our 842 species of native bees have to compete with them during the three snow-free months. The apiaries doing better negatively impacts the broader goals of my pollinator gardens. Those native species are the rapidly dwindling ones we can't replace commercially.

Whilst these initial results are promising, further large-scale field trials are needed to assess long-term impacts on colony health and pollination efficacy. Potentially, the supplement could be available to farmers within two years.

This new technology could also be used to develop dietary supplements for other pollinators or farmed insects, opening new avenues for sustainable agriculture.