
維生素B7的名稱來源於德語「Biotin」,意味著生命之源,這是因為維生素B7在生物體的生長和維持健康中扮演著不可或缺的角色。雖然人體需求量不大,但每天補充仍是必要的!
維生素B7不僅促進健康的頭髮、皮膚和指甲成長,也是碳水化合物、脂肪和蛋白質代謝中的關鍵輔酶,有助於維持穩定的血糖水平,並提升身體對壓力的應對能力。立即花幾分鐘了解維生素B7如何助你維持生命活力與健康!
維生素B7是什麼?
維生素B7,又稱生物素,是水溶性維生素,屬於B群維生素的一員,普遍存在於許多食物中。維生素B7在身體的碳水化合物、脂肪和蛋白質代謝過程中起著關鍵作用。
生物素的主要功能之一是作為多種酶系統的必需組分,特別是那些參與脂肪酸的合成和分解的酶。這使得維生素B7對於維持能量生產和身體正常功能是不可或缺的營養素。
此外,維生素B7對於促進健康的皮膚、頭髮和指甲的生長至關重要。它還參與合成神經傳導物質和遺傳物質(如DNA),在維持神經系統的健康和細胞分裂過程中發揮關鍵作用。
為什麼要補充維生素B7?探索其6大功效
1.促進健康的頭髮、皮膚和指甲:生物素對於保持健康的皮膚、頭髮和指甲有顯著作用,幫助減少斷裂和脫落,提升其整體外觀和質感。
2. 支持代謝功能:維生素B7是多種代謝反應的必需輔酶,有助於食物中脂肪、蛋白質和碳水化合物的正常代謝,從而轉化為身體可利用的能量。
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3. 改善血糖控制:研究表明,生物素可以幫助維持穩定的血糖水平,尤其是對於糖尿病患者來說,補充生物素可能對控制血糖有益。
4. 支持神經功能:維生素B7對於神經健康至關重要,尤其是在合成影響神經傳遞的關鍵神經傳導物質方面。
5. 胚胎發育:對於孕婦來說,生物素在確保胚胎正常發育的過程中扮演著重要角色,特別是在早期胎兒的生長和發育階段。
6. 增強皮膚防禦機能:維生素B7有助於維持皮膚的屏障功能,保護皮膚免受環境壓力和病原體的侵害。
維生素B7在人體內的儲存時間
當我們攝取維生素B7後,它在體內經過消化系統的吸收,進入血液循環中發揮作用。維生素B7的生理半衰期約為2至4小時,意味著一半的攝入量會在這段時間內代謝或排出。因此,需要定期攝取含有維生素B7的食物以維持其生理功能,如幫助脂肪酸和氨基酸的代謝,以及維持皮膚、頭髮和指甲的健康。
缺乏維生素B7會造成什麼危害?
缺乏維生素B7(生物素)可能導致多種健康問題,主要包括:
1.皮膚問題:可能出現乾燥、皮疹、皮膚炎症,特別是在面部和身體其他脂脂肪分泌較多的區域。
2. 頭髮問題:生物素缺乏可能導致頭髮稀疏、脫落,甚至於嚴重脫髮。
3. 指甲問題:指甲變薄、脆弱,容易斷裂。
4. 神經系統問題:可能會出現神經痛、肌肉疼痛、抽搐和其他神經系統問題。
5. 精神健康問題:例如抑鬱、注意力不集中、嗜睡或幻覺。
6. 消化系統問題:如食慾不振、噁心和腹瀉。
7. 免疫系統弱化:更容易感染和長時間病程。
如何補充維生素B7?高含量維生素B7食物排行榜!
★蔬菜菇類食物排行(每100g含量)
- 花椰菜:0.42 mg
- 菠菜:0.40 mg
- 甜菜:0.32 mg
★堅果類食物排行(每100g含量)
- 杏仁:1.5 mg
- 葵花籽:1.3 mg
- 花生:1.0 mg
★肉類食物排行(每100g含量)
- 牛肝:0.76 mg
- 雞肝:0.75 mg
★全穀類食物排行(每100g含量)
- 糙米:0.98 mg
- 燕麥:0.97 mg
★豆類食物排行(每100g含量)
- 黃豆:2.08 mg
- 鷹嘴豆:1.3 mg
★蛋奶類食物排行(每100g含量)
- 蛋黃:10 mg
- 雞蛋全蛋:5 mg
哪些族群應該特別補充維生素 B7?
- 孕婦與哺乳婦女:孕期和哺乳期對維生素B7的需求增加,因為生物素對胚胎的健康發育至關重要。
- 長期使用某些藥物的人群:例如抗生素和某些抗癲癇藥可能會干擾生物素的吸收和利用,因此長期用藥者可能需要增加補充。
- 有遺傳性生物素缺乏症的人群:這是一種罕見的遺傳疾病,患者無法正常利用生物素,需要透過補充來維持正常水平。
- 嚴格的素食者或純素食者:由於某些主要來自動物性食品的生物素來源可能不在他們的飲食中,嚴格的素食者或純素食者可能會需要補充生物素。
- 有消化吸收問題的人群:如腹瀉等疾病影響腸道健康,可能導致生物素吸收不良。
維生素 B7每日攝取量?
依照衛服部的「國人膳食營養素參考攝取量」B7的每日建議攝取量為:
成人
成年男性:30 μg
成年女性:30 μg
懷孕期女性:增加5 μg,共35 μg
哺乳期女性:增加5 μg,共35 μg
兒童和青少年
0至6個月嬰兒:5 μg
7至12個月嬰兒:6 μg
1至3歲兒童:8 μg
4至6歲兒童:12 μg
7至9歲兒童:15 μg
10至12歲兒童:20 μg
13至15歲青少年:25 μg
16至18歲青少年:30 μg
維生素 B7有副作用嗎?
維生素B7(生物素)也是一種水溶性維生素,通常過量的生物素會透過尿液排出,所以很少會造成毒性或副作用。然而,儘管生物素過量的副作用報告很少,若攝取超過推薦量的高劑量生物素,理論上可能會影響某些醫學檢測的結果,例如甲狀腺功能檢測。因此,建議在醫生的指導下使用任何補充劑,並遵守每日推薦攝取量。
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