This is all I know about zinc absorption: http://jacknorrisrd.com/zinc-supplements-which-are-absorbed-best/
I have no idea if what they’re saying about chelated zinc is true. Sorry!
As for the B12, I’m pretty sure there can’t just be “cobalamin”, it has to have a side group (methyl, cyano, hydroxo, and adenosyl being the most common). I tried to search for the company to see if I could figure out which type it was, or if they are using a questionable method for determining how much B12 is in their product, but I couldn’t find it. If you can find a link, post it and I will check it out. In the meantime, in my opinion, it’s most likely cyano.]]>
> Is it possible to achieve ferritin level of 50 to 70 ng/mL through diet alone?
It depends on the person. Many people achieve ferritin levels that high.
> What’s the ideal level for me?
I don’t think there’s an “ideal” level. But above 18 ng/ml is considered “not deficient”. Trying for closer to 50 might be a good idea so you don’t dip into the deficiency range.]]>
Have you been tested for vitamin D or iron deficiency?]]>
Here’s a big problem, its not a balanced debate, vegans won’t eat meat but its not vice-versa, meat eaters will eat their veggies, wouldn’t a more balanced study compare meat eaters who eat hardly any veggies to vegans, even though vegans would never eat meat although hard-core meat eaters may still eat a veggie or two?
Comparing a “Salad only diet” vs. a “salad and meat diet” rather than a “meat only diet” seems unfair.]]>
How are you doing?
I have another question about your recommendation:
You recommend us to take 2000mg daily for 2 weeks, and after that we would shift to step 2, which has an option to take 1000mg twice a week. You explicitly state that the recommendation is for cyanocobalamin only.
What if I have 1000mg/tablet of pure cobalamin? I just have bought a B-12 supplement from Healthy Options but I didn’t notice until I got home that the 1000mg is cobalamin not cyanocobalamin.
Would your recommendation, in this case, not hold? What would you recommend me then?
Also, if I may, I want to ask what do you think about Chelated Zinc vs. Zinc Gluconate? I also bought a Chelated Zinc (30mg, tablet) as a replacement for my old Zinc Gluconate (tablet, chewable). The chelated says it utilized technique for greater absorption through amino acids, while the gluconate is chewable (which seems to me enhances absorption). Or perhaps I can also chew the chelated (although it probably wouldn’t taste as good as the chewable gluconate!)? There’s also another version (which I forgot the name) of zinc that is capsulated (Gelatin), which they said is better than the chelated one.
“The high-carbohydrate diet was a low-fat lacto-ovo vegetarian diet (58% carbohydrates, 16% protein, and 25% fat) using low-fat or skim milk dairy products and liquid egg whites or egg substitute to ensure a low–saturated fat and low-cholesterol intake.”
Seems quite biased to me.]]>
It sounds good to me. I’ve never reviewed the research on it. I was planning to as part of my vitamin K2 series.]]>
“Vitamin K – Exogenous vitamin K is required for the carboxylation of osteocalcin, which in turn allows osteocalcin to bind to hydroxyapatite mineral. A vitamin K2 preparation (menatetrenone) is widely used for the treatment of osteoporosis in Japan.
Observational data suggest that low vitamin K consumption or impaired vitamin K status may be associated with an increased risk of fracture in older men and women [56,57]. (See “Vitamin K, gamma carboxyglutamic acid, and the function of coagulation and other proteins”.)
Clinical trial data suggest that vitamin K supplementation may reduce bone loss and fracture risk . This was best illustrated in a meta-analysis of 13 trials of oral vitamin K (phytonadione and menaquinone) supplementation for bone loss and fracture prevention . Both supplements increased bone mineral density. Seven trials reported fracture data; all were in Japanese patients (primarily postmenopausal women with osteoporosis) and used menaquinone. Significant reductions were seen for vertebral, hip, and all non-vertebral fractures (odds ratio 0.40, 0.23, and 0.19, respectively, with 95% CI of 0.25-0.65, 0.12-0.47, and 0.11-0.35, respectively).
This report should be interpreted with some caution as fracture data are available only in Japanese women, who may have significant dietary differences from other populations. In addition, the magnitude of the fracture risk reductions seems unlikely, as it was far greater than what is seen for other proven therapies, such as bisphosphonates. Furthermore, in subsequent randomized trials in healthy, older, predominantly Caucasian men and women receiving calcium and vitamin D supplements, vitamin K (200, 500, or 1000 micrograms phylloquinone daily or 45 mg menatetrenone daily) did not have any effect on BMD [60-62]. Based upon the available data, we, therefore, do not recommend routine vitamin K supplementation for the maintenance of skeletal health or the prevention of fractures in high-risk individuals.”
Jack – any comments?]]>