Whether you’re a body builder, athlete, or have low T (testosterone), Onnit’s T-Plus Testosterone Supplement was made for you. Testosterone levels dictate libido, athletic performance and overall mood. T-Plus has combined clinical and time tested components that have the ability to increase endogenous levels of testosterone while avoiding excess estrogen production. Onnit’s Testo Blend is a proprietary blend of magnesium aspartic acid, Mucuna, Long Jack root, and stinging Nettle root. This combination increases testosterone production.

Onnit’s Anti-Estro Blend contains Red Clover, Luleclin, and Resveratrol. These components block your newly made testosterone from being converted into estradiol and estrogen preventing the generation of feminizing characteristics seen with other testosterone products.

They have also included their proprietary blend of amino acids and branched-chain amino acids (BCAA) to build muscle and speed recovery from your workouts. Bioperine has been added to increase bioavailability (increase absorption). Maltodextrin is also added to provide for a quick energy source to support your workouts.

As we have come into the twenty-first century, men have become more aware of their bodies and behavior and not afraid to seek assistance if they need it. Many men suffer from low testosterone levels or low T. Testosterone levels begin to drop as early as 35 years of age. This brings about a number of changes in males including midriff bulge, muscle weakness/loss, fatigue, lack of confidence, decreased sex drive, and mood swings. Proper levels of testosterone provides for a healthy libido (sex drive), muscle mass, physical performance and endurance, high energy levels, confidence, and even temperament. Onnit’s T-Plus provides all the components necessary to support increased testosterone levels with the ability to build muscle mass as well. All you need to do is follow an athletic regimen that is appropriate for you in terms of what goals you have set.


Essentially, there are three major components to this novel formulation. First, this supplement contains a proprietary blend that boosts endogenous testosterone levels. Second, another proprietary blend inhibits the conversion of testosterone to estradiol. And Third, amino acids help build muscle mass to enhance performance and endurance.


Onnit’s Testo Blend combines magnesium aspartic acid, Mucuna, and Eurycoma longifolia (Long Jack root):

  • Magnesium aspartic acid has been demonstrated to increase free testosterone levels. This single amino acid actually stimulates luteinizing hormone (LH) production in the hypothalamus. LH is released from hypothalamic cells into the blood and travels around the body until it gets to the testes. Once inside the Leydig cells of the testes, this hormone causes these cells to produce testosterone. Clinical trials have shown that men given magnesium aspartate had a 42 percent increase in free testosterone levels.
  • Macuna promotes an increase in dopamine levels. Dopamine is a neurotransmitter that is involved in hormone synthesis, locomotor function, libido, and reward. Clinical trials have demonstrated increased levels of dopamine and testosterone in men with fertility problems when administered Macuna.
  • Eurycoma longifolia (Long Jack root) contains polypeptides that increase the production of hormone metabolites which in turn increases the production of testosterone in the testes.


Onnit’s Anti-Estro Blend combines Red Clover (15% isoflavones), Luleclin, and Resveratrol:

  • Red Clover and Luleclin prevent testosterone from getting converted into estrogen by inhibiting an aromatase enzyme that does the conversion.
  • Resveratrol binds directly to a certain subset of estrogen receptors and keeps testosterone from binding. This is an effective testosterone conversion to estrogen block.

These key ingredients will prevent the typical feminizing characteristics of other testosterone boosters.


Onnit’s Performo Blend combines Beta-alanine, branched-chain amino acids (BCAA), and L-glutamine:

  • Beta-alanine aids in buffering muscle tissue to keep proper pH levels to prevent fatigue from setting in during workouts.
  • Branched-chain amino acids provide substrates for building muscle.
  • L-glutamine inhibits muscle breakdown and promotes muscle repair and building.

Onnit’s T-Plus is Safe to Use in Competitions

Onnit assures that T-Plus is safe to use in competitions. They are in the process of getting T-Plus certified by the NSF Safe for Sport program and the Kolner Liste. This will mark the final stamp of approval. They state that no ingredient in T-Plus has been flagged or brought under investigation.


  • Vitamin B5 is a coenzyme required to activate certain enzymes involved with energy production. It is required to make cholesterol and hence sex hormones.
  • Vitamin B6 is a coenzyme required by over 100 different enzymes. It is important for protein synthesis. It is also involved with the production of neurotransmitters such as serotonin, dopamine, histamine, and epinephrine as well as the production of niacin (B3).
  • Bioperine has been added to increase the bioavailability of T-Plus and anything else you bring into your system.
  • Maltodextrin powder is a polysaccharide that provides quick energy to sustain your workouts.


Onnits T-Plus combines testosterone boosters, estrogen blockers, and branched-chain amino acids to support muscle building, promote high energy levels, increase libido, and maintain a healthy mood. Individual ingredients have been clinically demonstrated to boost testosterone and dopamine levels. T-Plus should be used as a pre-workout supplement.

Suggested Reading

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