12 Research backed ingredients to boost testosterone, energy and mood.
What are the benefits?
Renewed Energy & Vitality
Put the bounce back in your step, feeling sharper and livelier.
Turn back the clock and get back to your best.
More Muscle, Less Fat
Increased testosterone means your exercise regime starts paying dividends.
Reduce Stress, Feel Better
Drop those anxiety levels, feel calmer and more in control.
Known as the sunshine nutrient, vitamin D is a type of secosteroid hormone. Through a complex series of chemical conversions, UV light is converted in vitamin D by your own body.
In terms of testosterone, vitamin D acts as a precursor, and various studies have found a strong association between the two. Impressive increases have been shown for both total and free testosterone.
The most potent version of vitamin D, is best for health and performance. It’s estimated that the body requires 3000–5000 IU of vitamin D per day to meet the needs of every tissue and cell in the body, and studies have indicated that as many as 42% of American are deficient in the sunshine nutrient.
On the cognitive side the beneficial effects of Vitamin D3 have been widely publicized in relation to Seasonal Affective Disorder, a depressive malaise affecting populations in countries with limited winter sun.
There have been ongoing disputes for years on effective dosage levels, recent studies have shown the RDA has been miscalculated and is far too low. Higher doses of (6,000-8,000 IU) have been linked to better athletic performance, testosterone enhancement and better muscle recovery - we have selected the lower but highly effective dose of 4000IUs which has been safely used in long term academic studies on Vitamin D3.
- Increase total testosterone levels
- Increase free testosterone levels
- Improved happiness and subjective wellbeing
as Zinc Citrate
Dosage: 20 mg
The humble mineral zinc is found in foods such as beef and shellfish. It’s an essential nutrient meaning your body can’t make its own. You have to get it from your diet.
However, with 2 billion people worldwide suffering from zinc deficiency, chances are you don’t get enough of it. From a testosterone perspective, it has been shown to increase levels of both testosterone and DHT (a type of strong androgen hormone like testosterone).
It has also been shown to maintain testosterone levels in training athletes.
- Increase in testosterone levels
- Increase in Dihydrotestosterone
- Improved sperm count and fertility
- Anti-depressant effects
- Reduce anger/aggression
as Pyridoxine HCL
Vitamin B6 helps promote testosterone levels in two ways. Firstly it stimulates the production of the androgens which produce testosterone. Secondly, it works on the C2 pathway in the brain to regulate the production of estrogen.
An additional physical benefit of vitamin B6 is that it inhibits prolactin. As mentioned above in the mucuna pruriens section, prolactin reduces testosterone production, so reducing prolactin production has a beneficial effect on testosterone levels.
In relation to cognition, a relatively recent (2017) long term study into the effects of vitamin B6 on healthy adults over the age of 60 was conducted on 155 participants. It found that those with lower than expected levels of vitamin B6 also had a higher than expected rate of cognitive decline. A Canadian study found that there was evidence the amino acid Homocysteine, which relies on B6 for production, helps prevent dementia and cognitive decline.
It assists in the production of serotonin which helps regulate mood and norepinephrine which our bodies use to control stress.
- Stimulates production of testosterone
- Reduces estrogen
- Reduces prolactin levels
- Helps prevent cognitive decline in old age
- Improved mood
- Reduced stress
as Amino Acid Chelate
Dosage: 10 mg
Significant research shows boron is able to enhance free testosterone and even ramp up markers of physical performance. And in addition to that research has shown that boron has positive effects on short and long term memory, attention, and brain function.
In a study of 8 healthy men, acute boron supplementation (11.6 mg) wasn’t found to significantly increase total testosterone levels, but even in a short 6-hour window was seen to increase the trend of free testosterone by a surprisingly high 14% - a lot for less than half a day.
Not only that, but boron also decreased SHBG levels by nearly 10%. As the protein responsible for binding to testosterone and making it unusable, that’s an important and interesting finding.
In this study, 19 male bodybuilders were given a low dose of 2.5 mg of boron for just less than 2 months. The guys, who were obviously active but new to bodybuilding, had their plasma testosterone measured before and after the nutritional intervention, as well as markers of muscle mass and strength.
The results were conclusive - even with a dose lower than the recommended 10 mg for enhanced performance, boron elevated androgen levels by over 60% as well as 1RM squat and bench press strength.
- Increase free testosterone
- Reduce SHBG Levels
- Reduce Estriadol
- Short and long-term memory improvement
- Attention, co-ordination and reaction time
Dosage: 200 mg
I3C is formed during the digestion of a chemical called glucobrassicin. As the name suggests, I3C is found in brassica and cruciferous vegetables - broccoli, cabbage, collard greens and kale.
As a subject of hundreds of biomedical research projects, I3C is fast becoming the most valid anticarcinogenic, atherogenic antioxidant-rich nutrient around. But it's included in Centrapeak for its ability to inhibit aromatization - in other words, it reduces estrogen.
Reduce estrogen and you promote testosterone. According to one clinical trial published in the prestigious Journal of Nutrition.
“I3C causes growth arrest and increased apoptosis and ameliorates the effects of estrogen”.
In a similarly beneficial study, 7 men were given 6-7 mg of i3C per kilogram of body weight. Supplementing it for only 1 week, metabolism of estrogen significantly increased.
Being far more bioavailable and effective as I3C than DIM, this is an ingredient with many additional health benefits.
- Reduces estrogen production
- Increases estrogen metabolism
- Reduces estrogen potency
Standardized to 1.5% Withanolides
Dosage: 500 mg
Ashwagandha is packed full of nutrient goodness. It’s a rich source of alkaloids, fatty acids, and steroidal lactones - all shown to have aphrodisiac and life-prolonging properties.
Studies have shown that when stressed adults were given a 300 mg extract of ashwagandha root, their levels of the primary stress hormone cortisol retreated by nearly 30% - in as little as 60 days.
Ashwagandha isn't just included in Centrapeak for its stress-relieving characteristics though. For hundreds of years, Ashwagandha has been used in traditional Ayurvedic medicine as a libido enhancer. Modern research methodology has confirmed that it increases testosterone and fertility.
As an anabolic-androgen, testosterone is also responsible for increasing your muscle mass, strength, and power. In a study from the International Society of Sports Nutrition, 57 active men who regularly lifted weights were given 300 mg of ashwagandha root twice daily for 8 weeks while taking part in a standardized strength training program.
Muscle mass significantly increased and testosterone levels skyrocketed.
- Increase testosterone
- Increase muscle mass and strength
- Reduce physical stress by reducing cortisol
- Boost fertility
- Reduce anxiety and mental stress
- Help combat depression
Standardized to 40% Levadopa
Dosage: 150 mg
Mucuna Pruriens, also known as velvet bean, is a leguminous plant used in traditional Ayurvedic medicine.
It is an extremely high yielding source of levodopa (L-DOPA), which the body converts to dopamine through a process known as decarboxylation. Dopamine has a bi-directional relationship with testosterone through the hormone prolactin.
Increased prolactin through the pituitary releasing hormone (produced in the pituitary gland) results in a reduction in testosterone. Dopamine however, helps to inhibits the pituitary gland from releasing prolactin because it stimulates the release of prolactin inhibiting factor.
Clinical studies have demonstrated that mucuna pruriens is twice as effective at increasing L-DOPA in the body than taking synthesized L-DOPA.
The benefits of mucuna pruriens supplementation are not confined only to the physical. Mucuna pruriens been shown to increase dopamine levels and therefore reduce depression. It has also been found to increase other neurotransmitters that affect mood and possess antidepressant properties - namely serotonin and norepinephrine.
- Increase testosterone levels
- Increases levels of luteinizing hormone and follicle stimulating hormone
- Improved sperm motility and quality
- Increase HGH levels
- Improved cognition and concentration
- Increases antidepressant neurotransmitters
- Reduced stress through reduced cortisol
standardized to 3% Salidrosides and 1% Rosavins
Dosage: 100 mg
Rhodiola rosea is a naturally occurring flowering herb which has been used therapeutically as far back as the Vikings.
It is known as an adaptogen, as it assists your body to adapt to stress and has been the subject of a large number of academic studies into its cognitive health benefits.
The properties that make it such a widely taken supplement are mainly mental, but studies have demonstrated physical benefits.
It has been included in Centrapeak for its cognitive properties. It has been shown to be effective at reducing stress and depression, lifting mood and reducing mental fatigue in stressful situations.
- Improved physical endurance
- Decrease muscle damage after exercise
- Reduce general fatigue in stressful situations
- Reduced mental fatigue
- Improved subjective wellbeing and mood
- Reduced depression
- Reduced stress
Korean Panax Ginseng
Standardized to 5% Ginsenosides
Dosage: 100 mg
Panax Ginseng, or 'True' Ginseng as it is often known, is native to Korea or North Eastern China and the most potent of the Ginseng family.
After centuries of use in traditional medicine, the past 20 years has seen extensive research into this natural herb for a wide variety of medicinal reasons. And it has delivered impressive results in many key areas.
Physical benefits relevant to Centrapeak include testosterone levels and erectile dysfunction.
Its effectiveness at increasing testosterone stems from its ability to reduce blood glucose. Reduced blood sugar reduces insulin levels in the blood, and this has a positive effect on testosterone levels.
The positive effects on erectile dysfunction in relation to penile rigidity are put down to the positive effect Panax Ginseng has on nitric oxide levels in the blood. This works in exactly the same way as well known erectile dysfunction pharmaceuticals: improved circulation and increased nitric oxide lead to stronger erections.
It's a perfect ingredient for a 'Body and Mind' supplement like Centrapeak, as it has consistently demonstrated that it improves cognitive function, and subjective wellbeing.
It would be remiss of us not to finish off on the substantial additional benefits shown by Panax Ginseng. It's a long list, and many of the studies involved were long term studies involving large numbers of participants. Panax Ginseng has strong pedigree in clinical studies.
- Increase testosterone, DHT, and luteinizing hormone
- Regulates blood glucose and insulin levels
- Positive effects on erectile dysfunction
- Improved blood circulation through enhanced nitric oxide
- Increased cognitive performance due to anti-fatigue properties
- Increased subjective wellbeing
- Decrease in symptoms of cognitive decline
Lion's Mane Mushroom
(Hericium erinaceus) (mycelium)
Lion’s Mane (also known as Hericium erinaceus and Yamabushitake) is a non-toxic mushroom which grows naturally throughout North America, Europe and South East Asia. It is included in Centrapeak entirely for it's cognitive benefits.
It has been shown to stimulate the production of Nerve Growth Factor, a protein which plays key roles in the repair and generation of neurons. It has been shown to reduce amyloid plaques which reduce the effectiveness of signal transfer between neurons.
Over and above this, various Japanese studies have shown that it has an effect on limiting the effects of cognitive decline in older men and reducing the effects of anxiety and depression.
- Decreased anxiety
- Anti-depressant effects
- Limit cognitive decline
(Piper nigrum) (fruit) (standardized to minimum 95% piperine)
Dosage: 10 mg
BioPerine® is a patented, high-quality standardization of black pepper extract from the Sabinsa Corporation.
It has been included in Centrapeak not for its ability to boost testosterone or its cognitive enhancement - but because it helps facilitate the other ingredients, and get them doing their jobs more effectively.
Black pepper increases the bioavailability of ingredients in a supplement. In other words, it allows the body to absorb them more effectively in the digestive system.
Why BioPerine® and nor plain vanilla black pepper extract?
Piperine, the active ingredient in black pepper extract, takes time for its bioavailability enhancing properties to be released. This time delay is crucial, it is important for the increased absorption to happen immediately to get the most from your supplement. The highly purified version of piperine in BioPerine® will do exactly that - get to work quicker, and be a more effective bioavailability enhancer.
as Magnesium Citrate
Dosage: 50 mg
The different forms of magnesium found in supplements are absorbed by the body differently. We have chosen magnesium citrate is a much more bioavailable form, with 16% absorption rate as opposed to 4% in magnesium oxide. In terms of absorption and effectiveness, this means that 50mg of magnesium citrate is equivalent to 200mg of magnesium oxide.
Studies have shown that magnesium positively affects testosterone in health athletic males as well as older males. It increases levels of total testosterone, but also increases levels of free testosterone as it has an inhibiting effect on the binding of SHBG to testosterone molecules.
On the cognitive wellbeing side, magnesium has been used as a treatment for depression for over 100 years. Studies show that healthy levels can help prevent symptoms of depression, and supplementation can assist in curing depression.
It has also been shown in studies to aid muscle oxygenation, helping with aerobic exercise, and reduce blood glucose and pressure.
Modern farming methods and soil degradation coupled with poor diet mean that in magnesium deficiency is common in the US amongst all genders and ethnic groups. Studies have shown that a significant proportion of the US population is deficient in Magnesium. The latest large scale studies into it put that number at 68%.
One of the more subtle benefits of having this dose and this form of magnesium in Centrapeak is that it assists in the activation of the vitamin D3.
- Increases Total Testosterone Levels
- Increases Free Testosterone Levels through SHBG inhibition
- Helps prevent depression
- Helps mitigate agitation, anxiety and irritability
- Aids sleep
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