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Posted on 07/03/2026 8:04:25 PM PDT by aimhigh
Nutritional imbalance during pregnancy can have long-lasting effects on the health status and disease susceptibility of the offspring. As such, high fructose intake through sweetened food and beverages in pregnant women has been associated with an increased susceptibility to diabetes and cardiovascular disease, as well as neurological and cognitive impairments in the offspring. Currently, it is not well understood how early life exposure to fructose has such long-lasting effects on the cellular and molecular level.
In a recent paper published in Stem Cell Reports, Hiroya Yamada’s team from Fujita Health University School of Medicine, Toyoake, Japan found that the performance of adult rats in learning and memory tests was impaired when the rats had been exposed to high fructose in before birth by feeding their mothers with high fructose corn syrup. Furthermore, neurogenesis, which is the generation of new neurons from neural stem cells (NSCs), in distinct regions of the brain involved in learning and cognition was reduced in those rats.
Further, Yamada’s group discovered distinct changes in NSCs after high fructose exposure, which included reduced cell division and impaired generation of new neurons, and altered gene expression. To explain why prenatal high fructose exposure can have such long-lasting effects on NSCs, the researchers profiled the so-called epigenetic changes, which are chemical imprints on the DNA controlling gene activity. Strikingly, prenatal high fructose exposure introduced distinct epigenetic changes in fetal NSCs which persisted into adulthood and which deregulated the activity of genes important for adult neurogenesis. Restoring normal expression of those genes improved the function of high fructose-exposed NSCs.
This research illustrates how early-life exposure to an adverse environment, e.g. an imbalanced maternal nutrition, can have long-lasting effects on brain development and function by changing the epigenetic regulation of gene activity in NSCs. Importantly, although epidemiological studies in human populations show similar correlations, further studies will be required to test if human NSCs are affected by high fructose and other environmental stressors in similar ways. “Our study suggests that neural stem cells may retain a biological memory of maternal nutrition during pregnancy," said Dr. Yamada. "This may help explain how a transient prenatal dietary imbalance can lead to long-lasting changes in brain development and function."
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So no ice cream?
All part of the plan.
This means two very different sugar sources can end up with the same total fructose-equivalent number for very different reasons. Maple syrup and coconut sugar are almost entirely intact sucrose, so they show up as ~50% fructose-equivalent only after digestion breaks that bond. Honey and most fruit, by contrast, have already had much of their sucrose broken down naturally, so their fructose and glucose mostly exist as free monosaccharides rather than being locked inside sucrose. HFCS has no sucrose at all—it's manufactured as a direct blend of free fructose and glucose.
The table below separates free fructose, free glucose, and sucrose, then shows the total fructose-equivalent (free fructose + fructose's share from sucrose) that your body ultimately absorbs. Numbers are approximate and vary by source, ripeness, and variety.
Agave syrup/nectar was marketed for a while as a "healthy" sweetener alternative but it's among the worst. I've been using a blend of Allulose and Monk Fruit made by a company called "Lakanto." It's a pretty good sugar substitute.
| Sweetener | Free Fructose | Free Glucose | Sucrose | Total Fructose-Equivalent | Notes |
| Agave syrup/nectar | 70-85% | 10-20% | 5-10% | 75-90% | Highest fructose-equivalent on this list; wide reported range |
| Apples | 45-55% | 20-25% | 10-15% | 55-65% | Mostly free sugars with some sucrose |
| HFCS-55 | 55% | 45% | 0% | 55% | Manufactured blend; no sucrose present |
| Sucrose (table sugar) | 0% | 0% | 100% | 50% | Pure sucrose; splits 50/50 on digestion |
| Maple syrup | ~1% | ~1% | ~98% | ~50% | Almost entirely intact sucrose |
| Coconut sugar | 3-9% | 3-9% | 70-80% | ~50% | Mostly sucrose, similar to table sugar once digested |
| Grapes | ~45-50% | ~45-50% | trace | ~50% | Almost entirely free glucose and fructose |
| Dates | 24-32% | 24-32% | 0-40% | 45-50% | Sucrose content varies widely by variety |
| Bananas | 20-25% | 20-25% | 35-45% | ~45% | Sucrose share drops as fruit ripens |
| HFCS-42 | 42% | 58% | 0% | 42% | Manufactured blend; no sucrose present |
| Honey | 38-40% | 30-35% | 1-5% | ~40% | Enzymes largely break down sucrose during production |
| Corn syrup (not high-fructose) | ~0% | ~100% | 0% | ~0% | Essentially pure glucose |
This may explain why people born after 1973 seem a lot dumber than people born before that date.
Who knows.
I think the HFCS problem started a long time ago when, ever since corn has been subsidized and the cost is artificially low, making HFCS very cheap. I do believe, that was in part because many of the nations from where cane sugar was imported before that weren’t all that friendly with us:
Cuba was #1 in the world, historically in cane sugar production. The goal was to curb import of cane sugar, much of which came from nations hostile or unstable, while also giving US agra a boost:
file:///home/paul/Downloads/Barry.pdf (A good historical perspective)
Ironically, Cuba imported sugar from the US on more recent times, after their sugar industry post Cold War collapsed.
I don’t even think fructose is all that bad for you, in moderation!
It’s what is in fruit.
Sugar is in everything today and that’s a problem in its own right. Probably a contributor to the rampant diabetes and kidney disease.
But the fact that we use HFCS complicates things IMHO because your body does not process all sugars the same way, and you’re not really made to have those levels of fructose. Would anyone normally eat 16 pieces of fruit in a day? Probably not, but that’s not unreasonable with HFCS in everything and if you drink a few regular sodas in a day, have a slice of pie for dinner, some Waffles with syrup for breakfast etc.
If you drink enough water, you can kill yourself that way also: https://abcnews.com/GMA/jury-rules-radio-station-jennifer-strange-water-drinking/story?id=8970712
Maple syrup wins and I like it best.
When I was a wee lad, Mom used to give me maple syrup on cottage cheese! I started mixing cottage cheese with Greek yogurt a while back, add some maple syrup, toss in some vanilla whey protein powder, top with a few ounces of sliced fresh strawberries and a sprinkle of cinnamon. Yum! Lots of protein and real tasty.
Mom knew what she was doing in the early 50s.
sounds super yum.
I’m absolutely copying it.
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