I looked up the nutritional components of bamboo
shoots, the new growth, not older leaves, and boy was I surprised! The stuff is remarkably nutritious.
"The main nutrients in bamboo shoots are protein, carbohydrates, amino acids, minerals, fat, sugar, fiber, and inorganic salts. The shoots have a good profile of minerals, consisting mainly of potassium (K), calcium (Ca), manganese, zinc, chromium, copper, iron (Fe), plus lower amounts of phosphorus (P), and selenium (
Shi and Yang 1992;
Nirmala and others 2007). Fresh shoots are a good source of thiamine, niacin, vitamin A, vitamin B6, and vitamin E (
Visuphaka 1985;
Xia 1989;
Shi and Yang 1992). They are rich in protein, containing between 1.49 and 4.04 (average 2.65 g) per 100 g of fresh bamboo shoots. They contain 17 amino acids, 8 of which are essential for the human body (
Qiu 1992;
Ferreira and others 1995). Tyrosine amounts to 57% to 67% of the total amino acid content (
Kozukue and others 1999). Fat content is comparatively low (0.26% to 0.94%) and the shoots contain important essential fatty acids. The total sugar content, 2.5% on average, is lower than that of other vegetables."
https://onlinelibrary.wiley.com/doi/full/10.1111/j.1541-4337.2011.00147.x