It’s summer time. And with summer comes plenty of fresh fruit readily available at (slightly more than usual) reasonable prices. In fact, as I write this I have a big bowl next to me that is full of blackberries that I picked and froze last autumn mixed with juicy strawberries, picked up from a market the other day.
During the winter months I wrote up some research I had done into different carbohydrate sources, highlighting the need to select your sources carefully. Part of this was a discussion of fructose, so I decided that it was time I pulled together some recent articles about fructose to help you make your own decision about the benefits and problems of fructose.
- Suspend your complaints for a moment. Fructose is the same structure sugar as is found in high fructose corn syrup (‘HFCS’), although whether the levels of fructose found in a bowl of fresh fruit is as bad as in a standard “helping” of HFCS in a processed meal is not something I know the exact numbers for. Having got that up front, NephroPal has outlined some studies which connected excessive fructose consumption with scarring of the kidneys. I would imagine that excessive consumption is easier to do with HFCS, but that doesn’t mean that those of us with a taste for fresh fruit shouldn’t also be wary.
- Dr Briffa has written up a study looking at the possible cause of fatty liver in those where alcohol is not the obvious cause (a condition known as NASH – non-alcoholic steatohepatitis). It seems that, in mice at least (yes, I know we are not mice), extreme fructose intake may be a cause (though not necessarily the only cause) of this condition. Another strike against fructose.
- NephroPal finds and highlights some interesting news and studies, and the link for this point sends you to all sorts of interesting information. Top of the list though was a study which has concluded that people who took in 74grams of fructose a day or more (about 2.5 sugary drinks, thanks to HFCS) had a 28% risk of increased blood pressure and a 77% higher risk of extreme high blood pressure. Nutrition Horizon also wrote about this.
- Seasonality is, of course, a key element of the fructose debate. In the wild it is pretty difficult to lay your hands on fructose outside the summer months so, if you subscribe to the primal theories, we potentially shouldn’t be consuming fructose in the winter months. Mark Sisson has done a well-written and thorough article about this issue of fructose and seasonality which I recommend anyone reads.
So it seems from this that we need to be pretty careful about how much fructose we ingest. Stripping out processed foods with their HFCS is a good start but it seems that there is also a strong argument to avoid fruits outside season while making the most of the summer berry opportunities. So, on that note, I’m going to delve in the fridge a refill my bowl of strawberries which has run low while I’ve pulled this together.
Let me know if you see anything else of interest in relation to fructose – I’d love to know if there are some positives for fructose!






