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Muscle weakness
筋肉の衰え対策に
Decreased muscular size can be the result of not enough vitamin D in muscle and nerve tissue, says Kimberly Mueller, R.D., owner of Fuel Factor Nutrition Coaching. So if you notice that you can't eek out the same number of reps you've always done, that may be a sign you need more vitamin D.
This nutrient is notoriously hard to get from food—so you need to be extra vigilant and keep an eye out for these clues you may not be getting enough.
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Sadness
鬱状態対策に
特に女性は。
According to a study in The Journal of Clinical Endocrinology & Metabolism, women with low levels of D are twice as likely to combat depression.
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Greater pain sensitivity
慢性的な痛みを感じ易くなるんですって。
特にアメリカの黒人の場合。
Insufficient levels of vitamin D have been linked to chronic pain, especially in black Americans.
黒人の場合は骨粗鬆症の心配が無いから
ビタミンDが一杯あるんだろうと思ってたけど
アメリカに長く住んでると
ビタミンDが欠乏するようになってる人もいるのか。
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Stress fractures
ビタミンDの不足からの「圧迫」骨折は言われなくても分かるけど
「ストレス」骨折ですか。
へえ〜
Vitamin D promotes bone growth—but when you're low in the nutrient, your bones become weakened, meaning your risk for stress fractures increases, says Mueller. In fact, some studies show as high as double the risk if vitamin D levels are exceptionally low.
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High blood pressure
高血圧対策にも必要。
Vitamin D plays a role in heart health, helping to regulate blood pressure. So when you don't get enough, your blood pressure can creep up.
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Sleepiness
ビタミンDが不足すると昼間に眠くなる？
これは知らなかった。
In one 2012 study published in the Journal of Clinical Sleep Medicine, lower levels of vitamin D were linked to higher levels of daytime sleepiness.
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Extreme crankiness
悪質なほどのむら気・気難しさ
PMSばかりじゃないんだって。
ビタミンDは気分に作用するセロトニンにも関わるんだって。
Before you blame your grouchiness on PMS, know that D affects the levels of serotonin in your brain—which also impacts your mood.
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Decreased endurance
運動選手の有酸素容量や持続力の低下にも関わるんだって。
ワタシの耐久力・持久力の無さはこれか？
Some studies have shown reduced aerobic capacity and overall endurance in athletes with low vitamin D levels, says Mueller.
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http://www.msn.com/en-us/health/medical/20-important-facts-about-vitamin-b12-deficiency/ss-AAc3zWg?ocid=UP97DHP
ビタミンB１２不足だと起きる症状
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