Tyrant® Cortisol Reducing Hardening Agent

210 reviews
You'll earn Tiger Reward Points on this product!

Calcium D-Glucarate

Calcium D-Glucarate is a powerful inhibitor of β-glucuronidase, which enhances the detoxification pathways of the body. Additionally, calcium d-glucarate has shown to be particularly effective in reducing estrogen and lipid levels. In fact some research notes that supplementation with this estrogen-lowering compound can reduce serum levels of estrogen by as much as 23%![1,2]

Green Tea Extract

Highly touted for its numerous health benefits, particularly in regards to cardiovascular health, green tea is included for its fat loss benefits. Green tea leaves are rich in several polyphenols and catechins, most notably EGCG. Countless studies have shown that green tea catechins increase energy expenditure and fat loss.[3,4] Some research even notes green tea can improve exercise endurance, meaning you’ll burn more calories during your workouts leading to even faster fat loss![5]


Naturally-occurring in the human brain, phosphatidylserine is a fat soluble amino acid derivative known for its ability to improve cognition, mental processing, and memory.[6,7] But it’s also a valuable cortisol lowering agent, too.

Phosphatidylserine reduces Adrenocorticotropic hormone (ACTH), the hormone primarily responsible for cortisol production in the body.[8] Lowering ACTH effectively results in lower cortisol production in the body, helping you stay less stressed and indirectly boosting anabolic hormones (i.e. testosterone), since chronically elevated cortisol levels can blunt testosterone production.

Diindolylmethane (DIM)

Found in all kinds of cruciferous vegetables like broccoli, cauliflower, and cabbage, diindolylmethane (DIM) is an potent aromatase inhibitor and estrogen blocker. DIM shifts estrogen metabolism in the body to work for you instead of against you. In particular, DIM stimulates Phase I enzymes which activates AhR in order to get more “good estrogen”, like 2-hydroxyestrone and less “bad estrogens”, such as 4-hydroxy and 16-hydroxy.[9,10,11]

Estrogen is not bad, but excessive estrogen can lead to fat gain, cause difficulty losing fat, water retention, mood swings, cravings and other deleterious effects. Cortisol like estrogen is not inherently bad, but excessive cortisol— otherwise known as the “stress hormone”, can slow down fat loss and even lead to the body storing fat in “problem areas” like the hips and butt in women and stomach and lower back in men. And with the stresses of life, cortisol can get out of control!

We don’t want to eliminate estrogen since it is needed for muscle growth and fat loss. Rather than eliminating all estrogen, we want to control estrogen in your favor! MTS Nutrition TYRANT™ can increase the amount of “good” estrogens (2-hydroxy) and decreases the amount of “bad” estrogens (4-hydroxy and 16-hydroxy). This means optimizing muscle growth and fat loss by producing more “good” estrogens while decreasing the risks of elevated “bad” estrogen levels. Cortisol is called the “stress hormone” because it is released in response to stress and anxiety. When released at a normal level, cortisol helps restore homeostasis after stressful events. But when too much cortisol is released or cortisol levels are elevated for too long, negative effects arise. Excessive cortisol levels can lead to suppression of the immune system, excessive protein breakdown, and the accumulation of abdominal fat. We don’t want to get rid of cortisol since we need it, we want to control it.

Here is a quick summary of the effects of these ingredients:
  • DIM positively shifts estrogen metabolism to produce more good estrogens and less bad estrogens.
  • Calcium D Glucarate increases the elimination of cancer-promoting toxins and estrogens.
  • Phosphatidylserine not only will improve brain functioning but will also help control cortisol levels.
  • Green tea improves overall health and promotes fat loss.

MTS Nutrition Tyrant - Hardening Agent
Rating : 5/5 - 28 Reviews.
$34.99 In Stock

1. Walaszek Z, et al; Dietary glucarate as anti-promoter of 7,12-dimethylbenz{a}anthracene-induced mammary tumorigenesis . Carcinogenesis. (1986)

2. Heerdt AS, Young CW, Borgen PI; Calcium glucarate as a chemopreventive agent in breast cancer . Isr J Med Sci. (1995)

3. Nagao T, et al. Ingestion of a tea rich in catechins leads to a reduction in body fat and malondialdehyde-modified LDL in men. Am J Clin Nutr. (2005)

4. Hursel R, Viechtbauer W, Westerterp-Plantenga MS. The effects of green tea on weight loss and weight maintenance: a meta-analysis. Int J Obes (Lond). (2009)

5. Ota N, Soga S, Shimotoyodome A. Daily consumption of tea catechins improves aerobic capacity in healthy male adults: a randomized double-blind, placebo-controlled, crossover trial. Biosci Biotechnol Biochem. (2016)

6. Parker, A; The effects of IQPLUS Focus on cognitive function, mood and endocrine response before and following acute exercise.; Department of Kinesiology, Angelo State University; 2011

7. Vakhapova, V; Phosphatidylserine containing omega-3 fatty acids may improve memory abilities in non-demented elderly with memory complaints: a double-blind placebo-controlled trial.; Neurology Department, Tel-Aviv Sourasky Medical Center; 2010

8. Monteleone P, et al; Blunting by chronic phosphatidylserine administration of the stress-induced activation of the hypothalamo-pituitary-adrenal axis in healthy men . Eur J Clin Pharmacol. (1992)

9. Sanderson JT, Slobbe L, Lansbergen GW, Safe S, van den Berg M. 2,3,7,8-Tetrachlorodibenzo-p-dioxin and diindolylmethanes differentially induce cytochrome P450 1A1, 1B1, and 19 in H295R human adrenocortical carcinoma cells. Toxicol Sci. 2001;61(1):40-48.

10. Jellinck PH, Forkert PG, Riddick DS, Okey AB, Michnovicz JJ, Bradlow HL. Ah receptor binding properties of indole carbinols and induction of hepatic estradiol hydroxylation. Biochem Pharmacol. 1993;45(5):1129-1136

11. Bradlow HL, Telang NT, Sepkovic DW, Osborne MP. 2-hydroxyestrone: the “good” estrogen. J Endocrinol. 1996;150 Suppl:S259-65.

Customer Reviews
4.8 Based on 210 Reviews
5 ★
4 ★
3 ★
2 ★
1 ★
Customer Photos
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
  • tyrant
  • results
  • cortisol
  • stuff
  • anyone
  • difference
  • stress levels
  • Stack
  • Insurgent
  • nutrition
Daniel C.
United States United States

MTS tyrant

All the MTS products are fantastic! I’ve had great results with the MTS product line and highly recommend to anyone looking for quality supplements.

Michael F.
United States United States

Way more than that was expecting!

I wanted to get a little bit harder for my competition. And about 2 months out I read about this product. It honestly works! Started to lean out and dry out very nicely after a couple of weeks! I am highly impressed and will use it my next competition! Thanks tiger fitness

Joshua R.
United States United States

Cortisol reduction

I have a busy and some might say stressful lifestyle. I am the high school teacher, coach, tutor and father of four. Managing my cortisol levels and staying "less stressed" is a big deal for me. Taking tyrant, the changes are subtle but are making a difference in my everyday.

Heather O.
United States United States


No problem noted seems to be working like a champ.

Daniel B.
United States United States


I like to combine Tyrant with Insurgent. Works well for me!

Nutrition Info

Warning Concerning California Residents: This product may contain chemicals known to the State of California to cause cancer and birth defects or reproductive harm.