血液的ph值（严格的说， 是血清值）是肺肾调控的， 其他脏器不一定喔。

血液的ph值（严格的说， 是血清ph值）是肺肾调控的， 其他脏器不一定喔。
"We are what we eat" 基本不错。 其实是“We are what they eat” They指的是我们吃进去的动植物吃的东西。植物吃的当然是土壤， 肥料， 空气。。。 至于什么碱性食物，广义的就是多吃蔬果。。。窄义的我看不懂。。。
WebMD上一篇文章谈碱性食物， link在此：

http://www.webmd.com/diet/alkaline-diets

不过要预防癌症， 目前这主要还是老天爷在做 （2/3肿瘤是坏运气），虽然有例外。。。


这个link一篇peer review的article

The Alkaline Diet: Is There Evidence That an Alkaline pH Diet Benefits Health?
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3195546/
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Human life requires a tightly controlled pH level in the serum of about 7.4 (a slightly alkaline range of 7.35 to 7.45) to survive [1].
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2. The Role of pH in Various Cells, Organs, and Membranes

The pH in our body may vary considerably from one area to another with the highest acidity in the stomach (pH of 1.35 to 3.5) to aid in digestion and protect against opportunistic microbial organisms. But even in the stomach, the layer just outside the epithelium is quite basic to prevent mucosal injury. It has been suggested that decreased gastric lining secretion of bicarbonates and a decrease in the alkaline/acid secretion in duodenal ulcer patients may play a significant role in duodenal ulcers [11]. The skin is quite acidic (pH 4–6.5) to provide an acid mantle as a protective barrier to the environment against microbial overgrowth. There is a gradient from the outer horny layer (pH 4) to the basal layer (pH 6.9) [12]. This is also seen in the vagina where a pH of less than 4.7 protects against microbial overgrowth [13].

The urine may have a variable pH from acid to alkaline depending on the need for balancing the internal environment. Acid excretion in the urine can be estimated by a formula described by Remer (sulfate + chloride + 1.8x phosphate + organic acids) minus (sodium + potassium + 2x calcium + 2x magnesium) mEq [14]. Foods can be categorized by the potential renal acid loads (PRALs) see Table 2. Fruits, vegetables, fruit juices, potatoes, and alkali-rich and low phosphorus beverages (red and white wine, mineral soda waters) having a negative acid load. Whereas, grain products, meats, dairy products, fish, and alkali poor and low phosphorus beverages (e.g., pale beers, cocoa) have relatively high acid loads [15]. Measurement of pH of the urine (reviewed in a recent study with two morning specimens done over a five-year span) did not predict bone fractures or loss of bone mineral density [16]. However, this may not be reflective of being on an alkaline or acid diet throughout this time. For more details, see Table 1.
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