The vitamin D deficiency delays the periods

Vitamin D for menstrual disorders

Vitamin D, which is largely absorbed from sunlight and to a lesser extent from food, has many functions in the body. This also includes influences on the female reproductive organs, the ovary, uterus and vagina, as well as on sex hormones. Relationships have already been shown between low levels of vitamin D and the infertility associated with ovulatory disorders. They can lead to sterility and polycystic ovary syndrome (PCOS). There is also evidence that increased vitamin D and calcium levels can improve reproductive functions in women with PCOS. So far, however, too little is generally known about the consequences of low vitamin D levels and disorders in the female menstrual cycle.

In a small Polish study, Karolina Łagowska examined the relationship between vitamin D (25 (OH) D) and menstruation in young women. 77 female students aged between 18 and 25 years with different body weights took part. Excluded were women with serious medical problems, using hormone contraceptives or other drugs, and vitamin D supplements. The women answered questions about the occurrence of the first menstruation, the course of menstruation and any disturbances that might be present. Anthropometric data were determined for all participants, body weight, BMI, body fat mass and waist circumference. The vitamin D levels in the blood of all women were also examined. Depending on the result, they were assigned to two groups. 60 women in one group had low vitamin D values ​​(<30 ng / ml), of which 65% of the women had only a very low supply of vitamin D (<20 ng / ml). In contrast, the 17 women in the other group had normal to good vitamin D values ​​(> 30 ng / ml ≤ 80 ng / ml). Here only two participants reported disturbances in the menstrual cycle.

In the group with the poorer vitamin D supply, the women were significantly more likely to be overweight or obese. 40% of the participants stated that they had prolonged menstrual cycles, in 27% the disorders were classified as oligomenorrhea (infrequent menstruation) and in 13% as amenorrhea (absent menstruation). These women also had higher levels of body mass, BMI, body fat content and waist size. Women who did not achieve the recommended level of at least 30 ng / ml of vitamin D were therefore almost five times as likely to suffer from an impaired menstrual cycle as compared to women with normal vitamin D levels.

This study found a connection between the frequency of menstrual disorders and low vitamin D levels. Further studies are needed to clarify the causes of this relationship in more detail. Vitamin D supplementation is necessary for women with a low supply to make up for the deficiency. This may then also improve menstrual disorders.

Karolina Łagowska, The Relationship between Vitamin D Status and the Menstrual Cycle in Young Women: A Preliminary Study. In: Nutrients, online publication of 11.11.2018, doi: 10.3390 / nu10111729.

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