Probably been done already. Problem is "satisfying" . Don't the french call it elan vital? Much the same as prana.
Prana is known in yoga as 'vital' energy and there in elan vital with have vital again. So? Vital energy.
All are related to life, life supporting, life giving, etc. So there you are, a pretty straightforward concept.
You will find the same basic concept in the word vitamin. Life supporting minerals.
Emphasis in all? Vital.
Of course you could always leave out that which is vital
Really Graham, you have sometimes a curious way of knitting things together.
Vital comes from the latin vita - life.
Elan means "spirited" or "enthusiastic". It can also refer to someone who is in motion. Elan vital is the main subject of philosophy of Bergson, one of the more wellknown and important French philosophers.
Did you not already suggest life force as a translation? Comes close to elan vital.