Ok home from track meet, a little on the mentally fried side so will reply to what I can.
Cell walls are damaged by cooking and freezing as well as blending. Try freezing a spinach leaf for a few minutes and taking it out again. Chewing can do it too. Apparently snacking is what is really bad for teeth. Xylitol can help with both and eating acidy things early on in the meal. Oh and the darling of nutritionalists, kale, can damage the protective layer on teeth.
Dates have TONS of sugar and the NHS reckon they count and don't include a limit. The three fresh dates on the list have 44g of sugar in them.
Willdoit, I read the blog post and it seems to say that eating slowly, not chewing is the key. My son took 20 minutes which is how long he would take to eat a meal.
Fredfred, I agree they can be very calorific, especially when I start adding PB and avocados and it can easy to over imbibe liquids. I don't drink more than a taster most of the time, just every now and again do I have a proper glassful because I REALLY don't need all that. My kids need the calories though, one is growing, the other does a ton of sports, about two hours a day and burns through calories.
I was under the impression that the sugar spikes depend on what you eat with the sugars and also what the GI is for that food. The berries/cherries/veggies that make up a large part of my smoothies are pretty low GI foods.
Re teeth being fine at 17. Mine were nowhere near fine at 17 :(( neither were my husbands so to have two kids without any cavities is a big achievement for us!
A quote from the daily mail (ugh) article
"But why is orange juice, for example, so bad?
The key issue is a lack of fibre. When we eat fruit, fibre forms a protective layer that acts as a barrier to the intestine.
This slows absorption of sugar, so the liver has a chance to catch up. In fizzy drinks, fruit juices and smoothies, the barrier has gone, which leads to the liver being overloaded."
There is a boatload of fibre in mine. We rarely have juice, I consider it pretty empty nutrition. We have a family birthday tomorrow so we will squeeze fresh juice but even then include plenty of pulp. We will also be having jam and croissants and cake, so really the juice is merely the tip of the iceberg.
Why am I bothered about the NHS. Well I am British and even though I currently live abroad I may come back some other time, or my kids might. Also we have a lot of family and friends there. Also if I wasn't still interested in Britain then I probably wouldn't be on mumsnet, eh?