The phrase "are actually essential for" is correct and usable in written English.
You can use it when emphasizing the importance of something in a specific context or situation.
Example: "These resources are actually essential for the success of the project."
Alternatives: "are truly necessary for" or "are vital for".
You might be tempted to try to push these emotions aside, but science has found that negative emotions are actually essential for your mental well-being.
On the other hand, physiological levels of ROS do not alter the integrity of cellular macromolecules [ 58], and ROS are actually essential for some cell functions and signalling pathways [ 11, 56, 59- 65].
And, as I have written previously, there is an increasing consensus that spending in a way that slows increasing inequality is actually essential for growth and that widening inequality hurts it.
And, as I have written previously, there is an increasing consensus that spending in a way that slows increasing inequality is actually essential for continued economic growth, and that widening inequality hurts it – including from bodies the Morrison backers often like to quote, like the IMF or the OECD.
Lehrer suggests that traveling and getting away from places we spend most of our time is actually essential for creativity.
This goal is actually essential for sound quality measurement, as well as for further sound-content-based searching and browsing methods that use perceptual models of environmental sounds and often require measurements based on perceptually relevant acoustical similarities.
The functional and active mitochondria status is actually essential for cancer cell physiology.
Our results clearly suggest that for men it is actually essential to consider both dispersion and skewness in the summary measure of the age-at-death distributions when examining differences between countries.
Furthermore, a handful of genes labeled non-essential were actually essential.
Note that even these 'indispensible' five show some losses in a few very reduced or parasitic eukaryotes such as the microsporidian Encephalitozoon cuniculi, and although all five are present in the budding yeast Saccharomyces cerevisiae, remarkably three of the five (Rab5, Rab6 and Rab7) are not actually essential for the viability of this yeast.
The long tracts of gene-free genome sequences are not actually essential for life as demonstrated experimentally by generating large deletions in mice (Nobrega et al. 2004) and can therefore be defined as conditionally dispensable.
