Bulbine (Bulbine Natalensis)




Bulbine Background

Bulbine natalensis is a plant that is native to southern Africa, well-known primarily for its testosterone and libido-boosting benefits. Bulbine natalensis is a succulent plant – one of around 160 species in the Bulbine genus.

Aside from its sexual health benefits, there are a number of other uses for the Bulbine natalensis, which is packed full of saponins, tannins, alkaloids, anthraquinones, and cardiac glycoside.

Bulbine Natalensis has been tested primarily in animals, and initial studies show that the stem of the plant can affect testosterone, luteinizing hormone (LH), which helps with the production of testosterone, follicle-stimulating hormone (FSH) and estrogen levels. Other benefits range from wound healing and sex drive to increased while blood cell counts and more.

The plant has been used for centuries for traditional healing remedies. Bulbine natalensis also sometimes referred to as Rooiwortel (red root) due to the reddish color of its roots. Medicinally, the sap from the leaves is used in a similar way to aloe vera gel for topical use, in addition to the traditional use of the plant as an aphrodisiac and testosterone booster.

Effects on the Body

There is still more research that needs to be done on the impact of Bulbine natalensis in the body, and the precise mechanisms of how it affects the body have not yet been conclusively established. From preliminary research, the plant is thought to act by:

  • Increasing testosterone levels both in the testes and in the blood
  • Increasing the size of the testes due to high testosterone levels which, in turn, boost testosterone secretion
  • Boosting alkaline phosphatase, a testicular enzyme which is essential for maintaining sperm health
  • Raising cholesterol in the testes, which is responsible for making testosterone
  • Raising the level of compounds needed for maturing and maintaining healthy sperm including glycogen, sialic acid, testicular proteins)
  • Boosting reproductive hormone levels, both FSH and LH, which then stimulate Leydig cells to produce testosterone.

Pharmacological Properties

The pure form of the herbal compound contains many compounds, including:

  • Saponins (1.97% of dry weight)
  • Anthraquinones (0.152% dry weight)
  • Tannins (0.481% dry weight)
  • Cardiac Glycosides (0.887% dry weight)
  • Alkaloids (0.2% dry weight)

The Benefits Bulbine Natalensis

Bulbine Natalensis contains several beneficial compounds that work together to offer health and wellness benefits, primarily related to sexual and reproductive health.

Boosts Testosterone Levels

Bulbine natalensis is famous for its testosterone-boosting properties. Zulu men have used the plant as a natural aphrodisiac for centuries.

According to a study done on rats in 2010 and published in the peer-reviewed medical journal, Pharmaceutical Biology, the herb may boost testosterone levels. Taken at the right dosage, Bulbine natalensis effectively increases testicular and serum testosterone concentration. The study also noted an increase in testicular acid phosphatase activity, serum follicle-stimulating, and luteinizing hormone concentrations.

A follow-up study testing testosterone levels in rats found that at the right level 50mg per kg, there was a corresponding increase of 346% in testosterone.

Testosterone is anabolic so, if channeled correctly, it promotes muscle building. This makes it easier to build lean mass, burn fat, and improve mental acuity. Monitoring and making changes to the level of hormones in the body is vital for muscle growth, moving to the next level in strength training if you have plateaued, and promotes general health. To get the most out of this testosterone booster, Bulbine natalensis is essential to tailor the style of exercise, diet, and nutrition quality and the amount of sleep.

The findings of the studies on Bulbine natalensis have resulted in a spike in the interest of the sports industry and led to its inclusion in many sports supplements.

Increases Libido

Phytochemical compounds that are present in the plant extract work increase sexual behavior. The compounds that are believed to be responsible for this include saponins, cardiac glycoside, tannins, alkaloids, and anthraquinones.

A study conducted on rats and published in the International Journal of Andrology showed that rats given oral doses of between 25 and 50 mg per kg of the extract exhibited an increase in behaviors such as mount frequency, ejaculatory latency, and ejaculation frequency. There was also an increase in the concentration of serum testosterone and luteinizing hormone.

The seven-day study concluded that a dose of 25 to 50 mg per kg was effective in enhancing both mating activity as well as male fertility due to increased libido and higher levels of reproductive hormones.

In yet another study by the Centre of Phytomedicine Research, Department of Botany, University of Fort Hare, Alice, South Africa, serum testosterone levels were 347% higher than the control group. In contrast, estrogen levels were 35% lower. The study showed that in terms of libido enhancement, the herb outperformed Viagra (sildenafil) for all doses between 25mg and 50 mg per kg of bodyweight.

Although further research is needed, the Bulbine natalensis aqueous extract has the potential to effectively manage erectile dysfunction, premature ejaculation, and low libido levels in men.

Other Hormone Production

The herb has been shown to raise other hormone levels in addition to testosterone. The extract significantly increases levels of progesterone, follicle-stimulating hormone (FSH), and luteinizing hormone (LH). All of these hormones play an essential role in male reproductive ability.


Progesterone is most often associated with female reproductive health, but it is also vital for men. It works to counteract estrogen in the male body, as well as being a precursor to testosterone. It is also vital for specific sperm functions such as capacitation. Capacitation is the process by which the outer membrane of the head of the sperm is removed. This ensures that the sperm is ready to penetrate and fertilize the egg.

Progesterone also influences spermiogenesis, which is the final stage of the production of sperm as well as testosterone productions.

Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH)

Produced by the pituitary gland, the Luteinizing hormone (LH) forms an integral part of the reproduction system for both men and women. In men, its primary role is to stimulate the production of testosterone and the production of sperm. It does this by binding to the receptors on Leydig cells, which are responsible for the production of testosterone. Low levels of the luteinizing hormone can cause infertility.

Follicle-stimulating hormone (FSH), which is also produced by the pituitary gland, stimulates testicular grown and is necessary for sustaining the health of the maturing sperm cell.

Improves Wound Healing

Indigenous plants have been used in medicine and healing in South Africa, as well as for treating a wide-ranging number of skin conditions and ailments for centuries. A study conducted by researchers on the ability of Bulbine Natalensis and Bulbine Frutescens (another South African indigenous plant known for its health properties) to heal wounds showed promising results.

The study found that leaf gel extracts containing the herb were effective in healing wounds faster and better than wounds that were left untreated. At the site of the wounds, there was an increase in protein and collagen (both indicators of rapid cell division and faster recovery). At the end of 16 days, the wounds that were treated healed faster, and there was an increase in the skin’s tensile strength and DNA content. As such, the leaf gel extract has the potential to be developed into an effective topical wound treatment that would be low-cost and easily accessible.

The leaf gel extract has also been shown to enhance the progress of wound healing in weaning pigs, where the extract was effective in forming new fibrous tissue, increased collagen storage and maturation, and well as faster growth in muscles and connective tissues. 

Fights Fungal Infections

Traditional remedies make use of the herb in fighting fungal infections, and in South Africa, the local people tend to rely on plant-based medicines to treat skin ailments.

Extracts of the herb contain naturally occurring phytosterols (referred to as plant sterol and stanol esters), which are compounds found in the plant membranes and have a similar structure to the body’s cholesterol. In one study, phytosterols found in the herb were effective in blocking the growth of Aspergillus flavus, a toxic, aggressive fungi.

The same study looked at the efficacy of the herb in treating the growth of the fungus Aspergillus niger. In all tests, the extract was effective in completely blocking the growth of the fungus.

Fight Bacterial Infections

The herb has many different health applications, one of which is aiding in fighting various bacterial infections. It was effective in blocking the growth of the following bacterial species:

  • Staphylococcus aereus – this bacteria is resistant to most antibiotics and causes several conditions, including respiratory and skin infections, as well as food poisoning.
  • Streptococcus faecalis – this bacteria is often at the root of uterine tract infections (UTIs), but is also implicated in certain heart and wound infections.
  • Bacillus cereus and Bacillus pumilus) – infections of these two forms of bacteria can cause food poisoning.
  • Escherichia coli – this bacteria causes diarrhea and inflammatory bowel disease and can cause UTIs.
  • Pseudomonas aeruginosa – this bacteria is resistant to most antibiotics and can cause drug-resistant infections that may be life-threatening.
  • Klebsiella pneumoniae – this bacteria can cause bronchitis, pneumonia, and other respiratory infections.
  • Proteus Vulgaris – which can lead to uterine tract infections.
  • Enterobacter cloacae – this bacteria is at the root of a number of serious infections that affect the urinary tract, skin, lungs, and heart.
  • Shigella flexneri – which causes food poisoning.

What Users Can Expect

It is recommended to supplement with the herb once or twice daily, and for best results, it should be taken in the morning with breakfast.

In most cases, users will start to experience the benefits of the herb within the first two weeks of use. To monitor the supplement’s efficacy, take note of improved muscle recovery, and noticeable improvements to strength and training intensity.

For the best effects, Bulbine should form part of a healthy diet and training routine. Because the herb has anabolic effects, there should be substantial changes to the user’s physique within the first three weeks.


Other benefits:

The use of Bulbine-Natalensis has also been linked to several other health benefits, including:

  • Helping with rheumatoid arthritis
  • Assisting the body in fighting diabetes
  • Enhancing muscle development (see Boosts Testosterone Levels benefit)
  • As a remedy for sunburn
  • As a treatment for diarrhea
  • To treat bug stings and mosquito bites
  • For healing blisters, cold sores, and mouth ulcers
  • To speed the healing of bruises
  • Helps with erectile dysfunction
  • Increases libido
  • May help with rheumatoid arthritis


Origin: South Africa

Ingredients: Wild harvested Bulbine natalensis

Parts Used: Stem/roots

Forms: Two ounces of powder or 60 vegetable capsules (550-600 mg).


How to use:

The recommended dosage of the herb in powder form:

Take 1/2 tsp of dried powder in 8 oz. glass of favorite juice or smoothie once a day.

The recommended dosage of the herb in capsule form:

Take 1 capsule a day with water or favorite beverage.


The gel caps we use are Vegicaps (vegetable) and are all-natural. No Animal By-Products, Starch Free, Wheat Free, Dairy Free, Preservative Free, Ethylene Oxide, and Sulfite FREE!

Legal Information: The Food and Drug Administration has not evaluated these statements. This product is not intended to diagnose, treat, cure, or prevent any disease.

Copyright ©2020, All rights reserved

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