It's my understanding that the brewing process reduces cyanide levels back down to "trace". Definitely don't eat raw malted sorghum though. I believe it is the heating (kilning + boiling) that removes the cyanide.
FWIW, quoted from an article in the Journal of Food Science (ca 1984):
I would not make any beverage out of malted sorghum.
How do they process the sorghum in the various African beers that use it quite commonly?
It falls into a category referred to as "SMM" (Sorghum/Maize/Millet) beer, as these are the principal ingredients used to brew it. Industrial versions actually contain very little sorghum - approximately 10% (the remainder being unmalted maize).
Traditionally, malted grain sorghum (variety caffrorum) comprises at least half of the grain bill in home and village-brewed versions, the other half being millet or maize. Keep in mind that this sorghum is not the same as the "sweet sorghum" (variety saccharatum) used to produce the molasses-like syrup commonly found in North America. Please consult my articles in the 1995 Special issue of "Zymurgy" for more details on sorghum, its varieties, and the various methods used to malt it.
I'd be alright doing it, as long as I can remove the sprouts.
Why question my obviously universal truths?
which says brewing makes it good and here is one that says degerming the malt is enough to reduce cyanide to acceptable levels even without turning it into beer:Changes in tannin and cyanide contents and diastic activity during germination and the effect of traditional processing on cyanide content of sorghum cultivars
S. B. Ahmed, S. A. Mahgoub and B. E. Babiker
Abstract
Investigation of three sorghum cultivars showed that tannin content of ungerminated seeds were 220, 410 and 400 mg/100 g for Waznashra, Feterita and Gadamelhamam cultivars, respectively. For all cultivars, ungerminated seeds were found to contain no free or total cyanide. Their diastatic activities (the combined α- and β-amylase activities) were found to be zero. For all cultivars, tannin content was slightly increased when seeds were germinated for different periods. Both free and total cyanide were significantly increased with the length time of germination for all cultivars. Fermentation and heat treatment of germinated seeds significantly reduced cyanide content and only traces were detected in the final product (Hulu-murr and Merissa). Fermentation alone was found to reduce cyanide content, although not as much as when it was accompanied by heat treatment. Diastatic activity markedly increased with time of germination for Feterita and Gadamelhamam cultivars while for Waznashra it increased markedly up to day 3 after which it started to decline rapidly.
Results indicated that germination of sorghum seeds for different periods increased tannin and cyanide contents, while changes in diastatic activity depend on type of cultivar. Traditional processing was found to reduce cyanide contents of germinated seeds.
and lastly from the WHO, see page 24 for the "brewing reduces cyanide" conclusion.Changes in nutrient composition, phytate and cyanide contents and α-amylase activity during cereal malting in small production units in Ouagadougou (Burkina Faso)
T. Traoré, C. Mouqueta, C. Icard-Vernièrea, A. S. Traoréb and S. Trèchea
Abstract
The different traditional processes used in cereal malting were characterised and some biochemical modifications occurring in seeds during malting were studied to examine the possibility of using malted cereal flours to reduce the viscosity of gruels prepared from infant flours. Five production units (PU) of malted red sorghum seeds, two PU of malted millet seeds and one PU of malted maize seeds were selected as a function of the ability of the malt flours to fluidify high energy density gruels. Each of the 8 PU were monitored throughout the malt production process in order to describe rigorously the different steps in their malting process and to establish a detailed general production diagram. Samples were collected after soaking, germination, maturation, drying, and degerming and at the final product. They were analysed for nutrient, phytate and cyanide contents and α-amylase activity. For the 3 types of cereals, malting increased protein content while it decreased lipid and ash contents. A significant increase was observed in sucrose, glucose and fructose contents during malting, in particular during the germination step. The decrease in phytate content during malting was more obvious in millet seeds than in red sorghum and maize seeds. α-amylase activity increased during malting in all 3 types of cereals but more in red sorghum seeds than in millet and maize seeds. Cyanide content considerably increased during malting, particularly in red sorghum seeds. Sucrose content decreased during maturation while glucose and fructose contents increased. Traditional manual degerming reduced fibre and ash contents in all 3 types of cereals. Degerming had little effect on phytate content but reduced cyanide content to an acceptable level for human consumption even if it did not allow the complete elimination of cyanide. Unfortunately, degerming was accompanied by a decrease in α-amylase activity. The maturation step should be eliminated from the malting process (biochemical characteristics were not much affected as a result) and degerming of the seeds has to be systematically conducted after sun drying to achieve a significant reduction in cyanide content. Flours from malted red sorghum or millet seeds presented useful characteristics (α-amylase activity and nutrient contents) for incorporation in infant flours to improve the energy and nutrient density of gruels.
BBBF, that really is a pretty pic!