Category: Medicinal plants

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Ancient candy bars waiting to be rediscovered

It was something of a throw-away comment in the paper on the Kibale protected area in Uganda which I blogged about recently:

Tribes knew of coffee’s stimulant properties and mixed crushed coffee beans with animal fat to create “iron rations” used by warriors and travelers on long journeys (McCoy & Walker 1991). 1 In the KNP region, coffee beans were used in blood rituals and in the ceremonies of Toro kings.

It piqued my interest, but I did nothing about it. But then, as often happens, I came across a slew of similar things, such as this write-up for a “new” kind of candy bar. And then a reference in a discussion about how cacao was consumed by the Maya:

Sometimes the Maya mixed the cacao with cornmeal to create a tightly packed material, almost like a hockey puck, that was more transportable. That’s how they stored it. There are texts that say it ended up being stolen by enemies since it was very highly valued. It was also taken by the warriors when they went to their next job, if you will. When they were on the go, they’d just take these things out of their pockets and eat some. They were like early energy bars!

Now there’s a topic for someone’s dissertation. Are there also examples of ancient energy bars using tea, qat, or coca, for example?

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Why good food is good for you

I don’t know about you, but I do sometimes wonder why (or do I mean how?) good foods are good for you. I know that they contain more things like anti-oxidants and vitamin precursors and vitamins and minerals, but I don’t have a very clear idea of how those things work their magic, if indeed they do. And then I was watching a Tedtalk by a chap called William Li, a doctor with a special interest in cancer.

He was talking about blood vessels and the extremely delicate balance that regulates the life and death of blood vessels in the body, and I realized that I could remember almost nothing about angiogenesis and the hormones that control it. Once I did. Then Li slipped into cancers, and showed that tumours depend for their survival on their blood supply. Cut it off, and tumours shrink. In fact, he said, we probably have loads of mini tumours popping up all the time, less than the size of the tip of a ball-point pen, but in the absence of a blood supply, they just wither and die. Fascinating, so there are fancy drugs that block the growth of blood vessels — antiangiogenesis drugs — and that offer a new approach to treating cancer. And those same drugs can treat obesity in mice genetically predisposed to eat until they become, in Li’s words, “furry tennis balls”.

And then he moved smoothly into diet. And lo, there were lots of foods, many of them them fruits and vegetables, that seemed to have potent anti-angiogenic activity in lab tests. Some of them, combined, are more potent than either on its own or both together. He listed a bunch of foods, and then something that made me perk up even more.

“For each food type, we believe there is different potencies within different strains and varietals. And we want to measure this because, well, while you’re eating a strawberry or drinking tea, why not select the one that’s most potent for preventing cancer?”

Wow. A man who starts from the assumption that not all varieties are equal. While I am not too happy with the continuing medicalization of nutrition and diet, treating good food as no more than a series of active ingredients, I am glad that at least someone in the medical establishment is taking agricultural biodiversity seriously. Li’s bottom line:

Everyone could benefit from a diet based on local, sustainable, antiangiogenic crops.

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Nibbles: Land lease, Maasai flexibility, Small farms, Coffee, coffee, coffee, Climate change, Sahelian trees, Food as drugs, Field genebanks, Chinese medicinals, Bolivian NTFP, Invasives