Apropos news, here is your weekly serving of short news on all sorts of things... you are missing the exercise related news? Well, I saved those for a round-up and one or two individual posts in the course of the next week ;-)
Semisynthetic non-fermentable viscous fiber Hydroxpropyl-Methylcellulose is imported pound-wise from China and ends up as E464 from in all sorts of food - obviously at too low dosages to do the anti-obesity trick, though (learn more).
The protective effect on the epithelial cell lining and the increase in surface area in response to cellulose supplementation should also facilitate the uptake of those vitally important nutrients, people with Crohn's etc. are lacking - a result that may well be significant for those of you who are trying to make the most of the nutrients and not just the energy in their diets.
Edit: As George Henderson rightly said, the study at hand does not talk about cancer protection, I simply inferred that from previous human studies such as Mendez (2007), Terry (2001) or Roth (2001), without mentioning that, my mistake, sorry for that. I still changed the headline to reflect the contents of the study and want to point out that George also makes a valid point stating that (a) fiber often replaces other less healthy nutrients in the diet and (b) that (my addition) "once the baby has been thrown out with the bathtub" and you already have Crohn's and co different rules may apply.
- The diabesity syndrome - Is it the soda, or the bottle it's packaged in? (Indumathi. 2013) I
am well aware that the doses of BPA we are supposed to get from our
"diets" is way below those that are uses in rodent studies like the one
by Indumathi et al., but don't you think that it is still remarkable
that the same plastic poison aka BPA that leaches so readily into the
acidic brown soup 50% of the US citizens guzzle on a daily basis, induces exactly
the same nasty reductions in insulin receptor and GLUT-4 transporter
expression, as well as glucose oxidation and the phosphorylation of Akt
which are currently still ascribed exclusively to the soda itself (see figure 1).
Figure 2: Effects of 20 or 200mg/kg body weight of BPA on insulin receptor and Akt phosphorylation, GLUT-4 expression in skeletal muscle and systemic insulin and testosterone levels (Indumathi. 2013)Did you know that the amount of BPA that leaches from plastics increases by x40, when you dishwash and reuse them (Brede. 2003)? And worst of all, these figures were observed in baby bottles and thus objects those of us get in contact for whom the otherwise probably harmless exposure could actually be dangerous (DiVall. 2013). Exposure to higher temperatures of liquids in plastic containers in the summer (>40°C) is another factor which contributes to an increased leakage of BPA from the container into the liquid (Makris.2013)With the latter being the only blood parameters that are evaluated on a regular basis within at least a reasonably large cross section of the population it's no wonder that many of us don't see how the diabetic beast and the BPA castrator are sneaking up on them before it's already too late. Obviously no reason for the FDA or any other governmental body to even bother. Aside from the U.S. Environmental Protection Agency which has published a reference dose of 0.05 mg/kg/day for BPA in 1993 (IRIS. 1993) an official acceptable daily reference intake for BPA is still lacking. Even if the current research does not suggest that our daily exposure is high enough to actually do any harm, I would expect the reference levels to reflect that - what about you? In 1998 the Consumer Union wrote a letter to the FDA compaining about "endocrine disrupting chemicals" in cheese and dairy in plastics wrappings. I wonder if they knew about the masked phtalates in hygiene products, as well.
Apropos good news, in December 2012, Fierens et al. investigated the effects of cooking at home on the phtalate content of foods and found that, except for veggies, the phtalate content of almost all foods decline after cooking (Fierens. 2012). I guess, I don't have to mention that this is not going to happen in a crock pot unless you pour away the brew.
What you should also keep in mind is that your diet is by far not the only way you are exposed to phtalates, as a group of scientists working at a University right around my corner elucidated (Koch. 2013). The "pro-breast cancer" monoethyl carboxylpentyl phthalates (MEPs) for example usually come from personal hygiene products (it's the stuff thats called "fragrance"). The dosage, by the way, was high enough for the scientists to be able to actually measure rises in MEP concentrations after people (esp. men, by the way) took a shower. Ah, and not to forget a non-negligible amount of the low molecular weight phtalates is simply with ubiquitous sources including dust and indoor air. Up to now convincing evidence for the role of this constant assault in any of the ailments our society is suffering from is not conclusive.
Don't like oats? Buckwheat has similar benefits (Stringer. 2013) -- In a recently published paper in the scientific journal Metabolism, a group of researchers from the University of Manitoba in Winnipeg, Canada, reports that the consumption of buckwheat cracker either instead of rice crackers or simply on their own could help both diabetics and non-diabetics maintain a healthy weight.
4x more iron, 3x more calcium, >9 times more magnesium, ~6x more potassium and about twice as much zinc, copper and manganese that's what buckwheat flour has to offer compared to wheat (de Francischi. 1994). If you like those figures, what about havin' one of the pancakes you see above (recipe)
What's intriguing, though is that it appears as if these effects were not exclusively fiber-specific. After all, the rice crackers had almost as much fiber as the buckwheat. Moreover, a 2003 study Kawa et al. confirmed that even fiber-free buckwheat extracts exert potent anti-diabetic effects, the researchers ascribed to the presence of d-chiro-inositol in the extracts (Kawa. 2003).
- Anabolic vibes - Vibrate your way to higher testosterone levels (Couto.2013) -- If you still believe vibrators were for women only you got to check out the latest issue of the International Journal of Sports Medicine, in which a group of Brazilian scientists reports that the use of one of those fancy vibration devices (20-Hz and 12-mm) during the lat pulldown induced greater increases in testosterone and lactate concentrations. Dunno if that will also work if you just swipe your girlfriends vibrator and honestly, I don't even want to know that ;-)
- Does the testosterone and overall hormonal response to workouts even count, or are we still chasing a hormonal ghost? (Schoenfeld. 2013) -- In his latest review of the literature, Brad Schoenfeld who has been busy writing reviews on everything muscle heads are interested in within the last couple of weeks, picks the role of the endocrine response to exercise apart. In that, Schoenfeld points out that it is important to look close before you can tell whether or not a certain "hormone" will effect or even drive skeletal muscle hypertrophy.
Check out this previous analysis of post-workout anabolism here at the SuppVersity (read more)
In accordance with what I have pointed out in the Intermittent Thoughts on Building Muscle Series Schoenfeld comes to the conclusion that it would be inappropriate to totally discard the importance of the endocrine response to workouts (IGF-1 & Co, in particular), just because it does not promote the (imho totally overrated) short term protein synthetic response to exercise:
"Based on limited cellular signaling data, it is conceivable that the primary effect of post-exercise hormonal elevations is to increase satellite cell activity as opposed to mediating acute increases in muscle protein synthesis. If so, this could favor greater long-term increases in muscle hypertrophy without significantly impacting short-term gains." (Schoenfeld. 2013)Obviously (and rightly so) Schoenfeld concludes this paragraph of the discussion of this excellent review with the sentence "This hypothesis requires further study." -- And you bet, I will keep an eye on the topic in order to let you know whether the 8% of which West and Phillips say that it's the upper limit of the contribution the transient increases in endocrine hormones have on skeletal muscle hypertrophy (West. 2012) is an over- or underestimation.
- Excess magnesium is good for your testosterone levels, bad for your prostate and could potentially become fatal for your heart (Chandra. 2013) -- According to the latest results from a rodent study, it appears as if an excess intake of magnesium, ingested not as supplement but in form of magnesium sulfate in the chow, can boost testosterone levels by almost 30% (figure 1):
Figure 1: Testosterone levels prostate weight, luteinizing hormone and serum magnesium levels (all data expressed relative to baseline) after 15 or 29 days on diets with different magnesium content.
+++ Have a nice weekend, everyone! +++
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