Soy milk and other soy products are a good source of nutrition, as soybeans are rich in phytoestrogens, fiber, B vitamins, minerals, and high-quality protein.

The notion that "soybeans cause infertility" originated from a small 2008 study. This research noted that a group consuming high amounts of soy had lower sperm concentration; however, sperm morphology and motility remained unchanged, and no participants experienced infertility. Subsequent larger analyses have shown no evidence that soy reduces male sexual function or fertility. Men can safely consume soy milk, approximately 300-500 ml per day, as part of a varied diet.

Soy milk contains beneficial nutrients and does not affect male sexual health. Photo: Ngoc Han

Male sexual function is influenced by various factors, including age, poor nutrition, stimulants, stress, and chronic conditions such as diabetes, high blood pressure, and sexually transmitted diseases. Symptoms often include reduced libido, premature ejaculation, pain during intercourse, and erectile dysfunction. Without treatment, these issues can lead to prolonged erectile dysfunction and negatively impact fertility and mental well-being.

To prevent these issues, men should maintain a healthy diet, exercise regularly, get enough sleep, limit alcohol, and manage stress. Practicing safe sexual behaviors and getting vaccinated can help men reduce the risk of HPV infection. This virus causes genital warts, and cancers of the penis, anus, and throat in men, which can consequently affect sperm quality. Men at risk are still advised to get the HPV vaccine to protect against uncontracted virus types, as HPV has many different types.

Currently, two types of HPV vaccines are available in Vietnam. The 9-valent vaccine protects against nine types: 6, 11, 16, 18, 31, 33, 45, 52, and 58. It is indicated for males and females aged 9 to under 46. The vaccine's protective efficacy exceeds 90%. Children aged 9 to under 15 years require only two doses. Individuals aged 15 to under 46 years receive three doses administered six months apart.

Doctor Nguyen Duc Ba Dat

Medical Manager, VNVC Vaccination System

Readers can submit vaccine-related questions for the doctor to answer here.