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TestoJack 100 TestoJack 100 120 caps.
Now Foods
35.23 $
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TestoJack 100

All variants:

Min. expiration date: 2021-10

From 3 units only: 34.53 $ / Units. -2%

Shipping weight: 220g
For men
For halal
35.23 $With VAT
0.59 $ / serving
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  • A complex of ZMA, Tribulus and Tongkat Ali (!)
  • Efficient testosterone booster (!)
  • Increases libido and sexual performance
  • Boosts vitality and energy for life
  • Alleviates stress symptoms and reduces cortisol
  • Has an adaptogenic and toning effect

Now Foods TestoJack is a dietary supplement with a standardised LJ100 Tongkat Ali extract which worked as an aphrodisiac, fought stress and increased the level of free and total testosterone during tests. The product has also been enriched with a Tribulus terrestris extract and a complex of magnesium, zinc and vitamin B6, i.e. ZMA.

Tongkat Ali (Long Jack; Eurycoma longifolia) - an extract of an Asian plant used for centuries as a strong aphrodisiac and a tonic. It is a source of alkaloids and glycosides (including beta-carbolines) and it affects the activity of male sex hormones. The extract increases the organism's immunity and resistance, has a beneficial effect on the mood and improves sexual functions.

Tongkat Ali increases the level of testosterone (!) - research review:

Supplementation with a standardised TA water extract in the amount of 200mg per day for a month caused the restoration of the right testosterone level in 90% of 76 patients who suffered from late onset hypogonadism (a testosterone deficiency syndrome connected with aging)1.

Monthly supplementation of TA in 63 subjects (men and women) resulted in the reduction of stress symptoms, reduced concentration of cortisol in saliva (-16%) and an increase in the level of testosterone by 37% in average 2.

Supplementation with the TA extract in the amount of 400mg per day in 12 physically active seniors for the period of 5 weeks resulted in a significant increase in strength and the total and free concentrations of testosterone in men and women3.

Tribulus terrestris - a medicinal plant broadly used as an aphrodisiac. It is traditionally believed to be a herb that improves sexual performance in men. It can have medical application in the treatment of urination disorders, inflammations of the prostate, hypertension and hypoercholesterolemia. It stimulates spermatogenesis in men and ovogenesis in women. It increases nitrogen retention and alleviates andropause symptoms. It has also been reported that after treatment with the Tribulus terrestris extract, the sperm cell number, vitality and mobility are increased and ejaculation is noticeably better.

Zinc - (as aspartate and zinc monomethionine) - an essential microelement (trace element), present in the active centres of about 200 enzymes, thus influencing the process of many metabolic reactions. It directly participates in androgen synthesis by activating 17-beta-reductase - the enzyme that catalyses the transformation of androstenedione into testosterone. Moreover, it is capable of increasing the level of total and free testosterone and decreasing the concentration of its metabolites.

Magnesium (as magnesium aspartate) - a mineral essential to the normal functioning of the organism. It performs the function of an activator for many enzymes, directly or indirectly affecting metabolic pathways. It is a component of bones, it reduces the degree of cell colloid hydration, participates in transmitting signals in the nervous system. Magnesium ions play an important role in maintaining the osmotic pressure of the blood and other tissues.

Vitamin B6 (as pyridoxine hydrochloride) - occurs in six forms which, as a result of enzymatic reactions, are transformed into pyridoxal phosphate (the biologically active form of vitamin B6); it is necessary for the synthesis of neurotransmitters (dopamine, serotonin and noradrenaline) and haemoglobin (red blood colourant) and facilitates the absorption of magnesium from the gastrointestinal tract. Moreover, it takes part in many metabolic transformations as a coenzyme, mainly in the transformations of amino acids (transamination and decarboxylation) and muscle glycogen (glycogen phosphorylase).

As clinical studies confirmed, supplementing the deficiencies of magnesium, zinc and vitamin B6 contributes to a significant increase of free and total testosterone in blood serum.

To sum up, Now Foods TestoJack is a product recommended for men in order to increase the level of testosterone, libido, sexual performance, stress resistance and everyday vitality.


1 M. Tambi et al., Standardised water-soluble extract of Eurycoma longifolia, Tongkat ali, as testosterone booster for managing men with late-onset hypogonadism, Andrologia. 2012 May;44 Suppl 1:226-30.

2 Shawn M Talbott et al., Effect of Tongkat Ali on stress hormones and psychological mood state in moderately stressed subjects, J Int Soc Sports Nutr. 2013; 10: 28.

Henkel RR et al., Tongkat Ali as a potential herbal supplement for physically active male and female seniors--a pilot study. Phytother Res. 2014 Apr;28(4):544-50.

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Container size: 120 capsulesServing size: 2 capsulesServings per container: 60
per portion (2 capsules)amount%DV
Vitamin B-6 (from Pyridoxine HCl)3 mg176%
Magnesium (from Magnesium Aspartate)140 mg33%
Zinc (from Zinc Mono-L-methionine and Zinc Aspartate)9 mg82%
Tribulus terrestris Extract (Fruit) (min. 45% Saponins)250 mg-
LJ100 Tongkat Ali (Eurycoma longifolia Extract) (Root) (min. 22% Eurypeptides)50 mg-

Other ingrednients

Cellulose (capsule), Cellulose Powder, Stearic Acid (vegetable source) and Silica.

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Magnesium (element from the group of alkaline earth metals, atomic no. 12, a chemical symbol - Mg), one of the most important health microelements, participates in the synthesis process of the disintegration of high energy compounds and processes of transformation of hydrocarbons and fats. It affects the dilation of blood vessels and lower blood pressure, prevents hypercoagulable state. Shortages affect cardiac arrhythmias, malignant muscle cramps, insomnia and anxiety. It is a component of many dietary supplements and found in foods such as whole grain bread, legumes, buckwheat, rice, fish, meat, as well as chocolate, cocoa and nuts.
Dosage of 100 - 500 mg / day

Magnesium aspartate


Asparaganian magnesium (chelate magnesium and aspartic acid) is an organic magnesium form characterized by absorption and stability in the body. Magnesium is actively involved in energy conversion (necessary in the process of ATP). Intracellular cation, stored in the bones, partly in soft tissues and minimal quantity in the extracellular fluid. Maintains a proper bone structure, nucleic acids and chromosomes. It is an activator of enzymes involved in the synthesis of protein, stabilizes cell membranes, conducts nerve impulses and increases contractility of nerve fibres.
Deficiencies of magnesium in the body are causing disorder of the immune system and water-electrolyte balanace, causing greater susceptibility to stress, irritability and insomnia. Magnesium deficiency can cause cardiac arrhythmias, uncontrolled muscle contractions, numbness in the limbs.
Asparganian Magnesium is a component of the mineral preparations (including ZMA), vitamin and mineral and pro-testosterone supplements used in sports supplementation.
Dosage: based on Mg ions, 100-500 mg per day.




Zinc (chemical element from transition group 12) belongs to the trace elements, it helps maintain acid-base balance of the body, protein, energy, lipid and carbohydrate metabolism. It provides bone metabolism and transport of oxygen. It protects the body against free radicals. Necessary for the proper operation of the senses of taste and smell. Positive impact on the process of insulin metabolism in the pancreas. It supports visual adaptation to the dark, has a significant influence on brain function. It is helpful in the treatment of infertility and mental illness.
Zinc deficiency leads to decreased immunity, and growth retardation. Zinc deficiency can occur in case of excessive consumption of simple sugars. In the case of hormonal therapy of women with irregular menstruation, the therapy should be associated with increased consumption of zinc. It can be found in food like: beans, eggs, carrots, beef and pork meat, milk, nuts, citrus fruits, seafood, rice, cottage cheese, lettuce.
Dosage: Daily 12-15 mg zinc. Exceeding the daily dose of 20 mg cause symptoms of poisoning of the body.




Exogenous methionine is an amino acid containing sulphur in its composition. It provides multi metabolism, with the indispensable help of vitamin B6. Participates in the synthesis of phospholipids (e.g. Lecithin), carnitine responsible for transport in the body of long-chain fatty acids, burned in the mitochondria cells (organelles in cells with a separate kernel), along with cystine forms cysteine. It is in the body antioxidant function. Natural source of acquisition of methionine are high-protein foods of animal origin (eggs, meat, fish), vegetable (sesame seeds, grain products). Available in all protein and carbohydrate protein and amino acid supplements such EAA and contain so-called all-day amino acids, supporting the liver preparations and cosmetics supporting the growth and condition of hair, skin and nails.


Tribulus terrestris


Tribulus terrestris – a plant of Zygophyllaceae, occurring on all continents (except the Americas and Antarctica), used in folk medicine of the Far East, as a strong aphrodisiac and tonic, of which active ingredient is saponin steroid (PTN), causing the release of nitric oxide corpora cavernosa of the male sex organ, and increase of the testosterone level. Available in the form of mono-preparation supplement and extracts of various standardization (from a few to up to 90%), and herbal remedies that improve the exercise and sexual capacity, and increase the level of testosterone, available at
Dosage: Depending on the standardization 1 - 6 mg / 24h

Eurycoma Longifolia extract


Eurycoma Longifolia extract (Pasak Bumi, Tongkat Ali) - Asian plant extract, used for centuries as a potent aphrodisiac and a as a toning substance. It is a source of alkaloids and glycosides (including beta-carboline), affecting the activity of male sex hormones. The use of the extract increases the immunity and endurance of the body, has a positive effect on mood and improves sexual function. In the sports supplementation it is used to strengthen the psychophysical condition and is a component of supplements improving the sexual function of the body.


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