维生素证据中等

Vitamin A

别名: retinol

Vitamin A is a fat-soluble vitamin needed for night vision, healthy skin and mucous membranes and immunity. Deficiency is rare in Europe, and because vitamin A is stored in the liver, excess from supplements can be harmful.

用途

Maintenance of normal vision, skin and immunity – strong evidence (EFSA)
Benefit of a supplement on a varied diet – weak evidence
Treatment of deficiency – strong evidence, though rarely needed in Europe

剂型及区别

retinyl acetate, retinyl palmitate

common stable forms of preformed vitamin A

A + D3 combination

often in cod liver oil; add up the doses of both vitamins

beta-carotene

provitamin A, the body converts it to vitamin A as needed

何时服用

With a meal containing fat.

适合搭配

Vitamin D, zinc.

不宜同服 / 需错开

Do not combine several vitamin A sources (multivitamins, cod liver oil, liver in the diet) or with retinoid medicines.

注意事项

In pregnancy or when planning it, avoid high doses – excess can harm the foetus; consult your gynaecologist. Take care with liver disease, osteoporosis and if you use retinoids (e.g. for acne).

安全性

EFSA set an upper limit of 3000 µg preformed vitamin A (retinol) per day (about 10,000 IU). Postmenopausal women and people at risk of osteoporosis should keep intake lower.

实用建议

Conversion: 1 µg retinol equals 3.33 IU – a 10,000 IU dose is already at the upper limit.

含 Vitamin A 的产品 9

Omega-3 fatty acids + Vitamin A + Vitamin D3 1000 mgcod liver oil · 1 000 mg / 粒心血管大脑与记忆炎症视力

Evening primrose oil + Vitamin A + Vitamin E 1800 mgGLA · 1 800 mg / 粒皮肤女性健康激素视力

Vitamin A + vitamin D+ vitamin D视力免疫皮肤

Vitamin A + Vitamin D3 10000 IUretinyl palmitate + cholecalciferol · 10 000 IU / 粒视力免疫皮肤骨骼

Vitamin A视力免疫皮肤

Vitamin A 10000 IUretinyl palmitate · 10 000 IU / 粒视力免疫皮肤

Vitamin A retinyl acetate + cholecalciferol 800 µgretinyl acetate + cholecalciferol · 800 µg / 粒视力免疫皮肤

Vitamin A retinyl acetate 1000 µgretinyl acetate · 1 000 µg / 粒视力免疫皮肤

Vitamin A + Vitamin D3 + Vitamin E + Vitamin K2fat-soluble complex视力免疫皮肤骨骼

如何理解证据评级

证据充分证据中等证据薄弱无证据

充分 = 多项高质量人体研究或官方推荐；中等 = 有前景但研究规模较小；薄弱 = 研究少或结果不一；无证据 = 说法未被证实。

搭配检查

选择您服用的补充剂及药物（如有），我们会显示哪些相互干扰、哪些需要错开时间、需要注意什么。

检查 Vitamin A 与其他的搭配

您真正需要哪些补充剂？

Fénix Methode 根据您的血检结果挑选并安排服用时间——不再白花钱。

了解 Fénix Methode

用途