Does Pueraria Mirifica Increase Breast Size?

Pueraria Mirifica is an herbal plant native to northern Thailand. It is also known as Kwao Krua. The herb is well known for its medicinal properties. Women in Thailand have been using it for centuries for its rejuvenating and anti-aging power. Recently, the herb has become extremely popular across the world for its breast enhancing properties.

Pueraria Mirifica breast enhancing supplements are easily available off-the-shelf at all major herbal stores.  Some users claim that their breast size increased significantly within 45-60 days of using Pueraria Mirifica. So, it is of interest to know if Pueraria Mirifica is really the “miracle breast enhancing herb.”

Pueraria Mirifica for Breast Enlargement

Pueraria Mirifica is believed to have a high concentration of phytoestrogen or plant-based estrogen compared any other herb such as soy or fenugreek.

This herb’s breast enhancing properties can be attributed to the presence of miroestrol and deoxymiroestrol compounds, which are both phytoestrogens and mimic the effect of estrogen in the body.  These compounds have stronger activity on estrogen, so they work better at stimulating breast growth compared to other herbs.

Apart from the breast enhancing properties, Pueraria Mirifica is known to offer a host of other health benefits as well. These include:

  • Firm saggy breasts
  • Anti-aging properties
  • Natural hormone supplement
  • Helps ease symptoms of menopause
  • Smooth skin
  • Enhances libido
  • Weight loss
  • Osteoporosis


Research on breast enhancing properties of Pueraria Mirifica

Some animal and human studies have been conducted to understand the efficacy of Pueraria Mirifica in stimulating breast growth and the results have been promising.

Pueraria Mirifica Exerts Estrogenic Effects in the Mammary Gland and Uterus and Promotes Mammary Carcinogenesis in Donryu Rats:

 In this study, scientists investigated the modifying effects of Pueraria Mirifica at various doses on endometrial and mammary carcinogenesis in female Donryu rats. It was concluded that:

  • Postpubertal, long-term Pueraria Mirifica administration to rats exerts estrogenic effects in the uterus and mammary gland
  • The dose of 200 mg/kg body weight per day was found to promote mammary carcinogenesis

Japanese study: Effect of Pueraria Mirifica on breast size in Japanese women

Two professors tested Pueraria Mirifica in 50 Japanese premenopausal, fertile women ages 20-49 by administering a daily dose of 100-600 mg. It was observed that 70 percent of the women reported breast enlargement and skin firmness.

Bangkok study: Efficacy of Pueraria Mirifica as a breast enhancing herb

In 2000, a study was conducted in the Chulalongkorn University, Bangkok in which three groups of 30 women each were given 400 mg Pueraria Mirifica, 800 mg Pueraria Mirifica or a placebo. After taking the Pueraria Mirifica supplement for two months, it was observed that:

·       More than 40 percent of women taking 400 mg daily dose confirmed that their breasts felt firmer. About 9 percent observed significant breast enlargement.

·       In the group that received 800 mg dose, 88 percent reported breast firmness and 82 percent reported an increase in breast size.

Based on these studies, it is safe to conclude that Pueraria Mirifica can help increase breast size and firmness.

Side Effects of Pueraria Mirifica

Pueraria Mirifica is considered safe, but there are certain groups of people who should avoid taking it. Pregnant women and lactating mothers should avoid its use. Cancer patients are also discouraged from taking this herb. Some possible side effects are:

  • Nausea
  • Delayed menstrual cycle, prolonged menstruation
  • A headache, vomiting, and constipation
  • Dizziness in case of some allergic reactions

However, these side effects are rare and often a result of overdose or misuse.


Pueraria Mirifica can be a safe and natural way to increase breast size and firmness. Considering the myriad other health benefits it has to offer, Pueraria Mirifica is indeed a powerful herb.