Twinlab Male Fuel 120 caps

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Male Formula with Yohimbe for Energy and Healthy Sexual Function.*
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The Science Behind The Size: Product: A scientifically advanced male formula with standardized Yohimbe bark extract and Arginine. Result: Enhances blood flow. Science: Yohimbine has been traditionally used to promote healthy sexual function.*

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.



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Health Notes

Disclaimer: The following content is provided by Aisle7 and is for informational purposes only. It is based on scientific studies, clinical experience, or usage as cited in each article. Hi-Health provides this information as a service but does not endorse it. In addition, Aisle7 does not recommend or endorse any specific products.

Antioxidants Improve Male Fertility

Antioxidants Improve Male Fertility
Antioxidants Improve Male Fertility: Main Image
Couples in which the men were given antioxidants were more likely to conceive than couples in which men received placebo or no treatment

Male infertility, which has been gradually increasing worldwide over the last six decades, is mainly caused by free-radical damage to sperm cells through a process called oxidation. These free radicals are generated by high temperatures, electromagnetic radiation, pesticides, and other pollutants, or may be encountered through lifestyle choices such as alcohol, smoking, stress, obesity, and poor diet.

Over the years, researchers have tried to determine whether men who supplement with antioxidants have healthier sperm. A review of the research concluded that couples seeking fertility assistance due to low sperm count or low sperm motility are indeed more likely to become pregnant and have a child if the man is taking antioxidants.

The evidence for antioxidants

The review, which comes from the esteemed Cochrane Library, included 34 studies with a total of 2,876 couples having difficulty becoming pregnant and undergoing assisted reproductive techniques, such as intrauterine insemination (IUI) and in vitro fertilization (IVF). The cause of all of these couples’ infertility was determined to be low numbers of sperm or low sperm motility. Each study compared some kind of antioxidant treatment for the men to either placebo or no treatment.

 The literature review led to several observations:

  • Couples in which the men were given antioxidants were more likely to conceive and have a child than couples in which the men received placebo or no treatment.
  • In particular, vitamin E, zinc, and L-carnitine were associated with increased rates of pregnancy and successful delivery in separate trials; however, there was not enough data to recommend one antioxidant supplement over any other.
  • Overall, conception was more than four times more likely when men were taking antioxidants.
  • Antioxidant use was similarly associated with a nearly five times increased chance of successfully delivering a child.

Fixing fertility problems with antioxidants

“In many cases of unexplained subfertility, and also in instances where there may be a sperm-related problem, taking an oral antioxidant supplement may increase a couple’s chance of conceiving when undergoing fertility treatment,” the authors of the review said. “When trying to conceive as part of an assisted reproductive program, it may be advisable to encourage the male partner to take an oral antioxidant supplement to improve his partner’s chance of conceiving.”

Improving the odds

In addition to having the man of the couple supplement with antioxidants, couples can take steps on their own to improve their chances of conceiving:

  • Keep the conditions right for healthy sperm. Wearing loose underclothes and avoiding hot tubs and whirlpools may help. Stay away from toxic chemicals such as those found in lawn care products, and supply your body with lots of fruits, vegetables, and fiber-dense foods.
  • The woman needs to be healthy, too. Women also need to pay attention to diet and exercise and maintain a healthy weight to optimize the chance of conception. Avoid caffeine and alcohol, which can reduce the odds of getting pregnant.
  • Quit smoking. Smoking has a negative impact on both male and female fertility.
  • Practice relaxation. Studies have shown that couples facing infertility who learn and practice relaxation techniques increase their odds of conceiving.

(Cochrane Database of Syst Rev 2011;1:CD007411)

Maureen Williams, ND, received her bachelor’s degree from the University of Pennsylvania and her Doctorate of Naturopathic Medicine from Bastyr University in Seattle, WA. She has a private practice on Cortes Island in British Columbia, Canada, and has done extensive work with traditional herbal medicine in Guatemala and Honduras. Dr. Williams is a regular contributor to Healthnotes Newswire.

Copyright © 2018 Healthnotes, Inc. All rights reserved.

Learn more about Healthnotes, the company.

Supplemental Facts


Supplement Facts
Serving Size: 3 Capsules
Servings Per Container: 40
Amount Per Serving %DV
Zinc (from Zinc Picolinate) 15 mg 100.000%
Pantothenic Acid (from D-Calcium Pantothenate) 50 mg 500.000%
Vitamin B6 (from Pyridoxine Hydrochloride) 25 mg 1250.000%
Vitamin E (from D-Alpha Tocopheryl Acid Succinate) 200 IU 667.000%
Choline Bitartrate 100 mg **
L-Tyrosine 50 mg **
Ginkgo Biloba Leaf Extract 30 mg **
L-Arginine Hydrochloride 1400 mg **
Saw Palmetto Berry Extract 60 mg **
Yohimbe Bark Extract (Standardized for 2% Yohimbine Alkaloids) 400 mg **
Plant Sterol Concentrate (from Soy) (Standardized for 40% beta-sitosterol) 60 mg **
**Daily Value (DV) not established.

Ingredients: Gelatin, Purified Water, Magnesium Stearate, MCT, Silica.

The most accurate information is always on the label on the actual product. While we periodically update our website, the values on the website are intended to be a general guide to consumers. For absolute values, the actual label on the product at hand should be relied on.

Key Ingredients:

Calcium Ginkgo Saw Palmetto Yohimbe
Additional Information

Additional Info

As a dietary supplement for men, take 6 capsules daily, preferably 3 capsules during the daytime and 3 capsules 60 minutes before bedtime. Do not exceed 6 capsules daily. Taking more than the recommended amount not improve results and may cause adverse reactions listed in the warning. Begin use with half the recommended serving (3 capsules daily) to assess your tolerance.

Not for sale to or use by individuals under the age of 18. Not for use by children, geriatric patients or females. This product contains yohimbe bark extract, which contains yohimbine. Do not use this product if you are at risk or are being treated for high blood pressure, heart, kidney, thyroid or psychiatric disease, anxiety, depression, seizure disorder or stroke. Consult your health care professional before use if taking antidepressants, MAO inhibitor or any other prescription drug. Discontinue use and consult your health care professional if dizziness, sleeplessness, tremors, nervousness, headache or heart palpitations occur. Discontinue use of this product at least two weeks prior to any surgery. Keep out of reach of children.


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