back to top

Bigger By The Day Muscle Builder with Turkesterone

Bigger By The Day® is the strongest all-natural muscle builder available. This hardcore formula now features Ajuga Extract along with ingredients like Epicatechin, HICA, Leucine, and now a massive dose of Turkesterone, nothing else comes close!

muscle builder



lean muscle

Bigger By The Day Muscle Builder with Turkesterone - 5% Nutrition


When it comes to natural muscle builders, there are several products currently available that like to brag about how hardcore they are. You’ve seen the ads and heard the hype. We’ve listened to it long enough! We decided to step in and show them how the big boys do it. 5% Nutrition has defined the word “hardcore” for years, and now we’ve designed the most potent legal muscle builder on the market – Bigger By The Day®!

We took the strongest legal, all-natural muscle-building ingredients available - including the powerful Turkesterone - yes, you read that right - and combined them into one incredible product. Then we dared to make it stronger than any other product!


Take a look at these ingredients:

Ajuga Extract (Ajuga turkestanica)(whole herb) – 1,000 mg – We’ve taken this powerful natural muscle builder and added it to the only formula that can handle it - Bigger By The Day®!

In-vitro studies show the effectiveness of this incredible ingredient! One of the primary benefits of Turkesterone is protein synthesis stimulation. Along with increased muscle mass via protein synthesis, Turkesterone supports increased strength. It also has anti-catabolic properties because it helps the body preserve muscle when you’re restricting calories.

That’s quite a list of impressive benefits! With the rest of the hardcore ingredients in this exceptional formula, Bigger By The Day® will make a huge difference in your workouts and results!

Turkesterone works best when taken with a high-protein meal, so make sure you take Bigger By The Day® with your two highest protein meals of the day.(1, 2, 3)

Green Tea Extract (90% Epicatechin) – 300 mg – This ingredient is a flavonol commonly found in dark chocolate and green tea. This compound has muscle growth properties and can stimulate nitric oxide production. We’re talking about increased pumps and enhanced nutrient delivery to your working muscles. One of the primary ways it stimulates growth is by inhibiting myostatin. What is myostatin? It’s a type of protein known as a growth factor that regulates how big your muscles can get. In effect, it puts a ceiling on muscle growth. You can raise the ceiling of your potential for gains by inhibiting myostatin.(4,5)

HICA – 500 mg – This ingredient is also known as A-Hydroxyisocaproic Acid or Leucic Acid. HICA is a metabolite of leucine, which means that when we metabolize leucine, our body breaks down into HICA and other metabolites, such as HMB. Here’s how it works. The leucine that is broken down into HICA is first metabolized into KIC. Then it’s broken down further into HICA; it becomes available for use at this point. Clinical studies have indicated that HICA can stimulate gains and reduce muscle soreness. (6)

Leucine – 200 mg – Leucine is one of the BCAAs and, without a doubt, the most powerful amino acid. It is directly involved in the stimulation of the mTOR pathway, which in turn activates protein synthesis. If gains are your goal, leucine should be very high on your list of supplements.(7) By combining leucine, HICA, and turkesterone, we have created a powerful trio that will effectively stimulate protein synthesis.

Bioperine® Black Pepper Extract – 10 mg – Ultimately, the effectiveness of any product comes down to how well it’s absorbed. Of course, we wanted to be sure this powerful muscle builder is fully absorbed for maximum benefits. This ingredient is well-known as an effective absorption enhancer that improves the absorption of the nutrients and ingredients it’s paired with.(8)

When it comes to the most potent all-natural hardcore muscle builder that was designed for serious results, Bigger By The Day® delivers!

Buy Bigger By The Day T-Shirt
BBTD Video Series
View BBTD Video Series
Read More

Supplement Facts

  • USA
Serving Size: 4 Capsules Servings Per Container: 30
Per Serving % DV*

Vitamin A (as retinyl palmitate)1,500 mcg RAE167%
Calcium (as dicalcium phosphate)29 mg2%

Ajuga Extract (Ajuga turkestanica)(whole herb)1,000 mg**
Alpha Hydroxyisocaproic Acid (HICA)500 mg**
Green Tea Extract (90% Epicatechin)300 mg**
L-Leucine200 mg**
Black Pepper Extract (Piper nigrum)(fruit)(Bioperine®)10 mg**

*Percent Daily Values are based on a 2,000 calorie diet.
**Daily Value not established.
Other Ingredients: Capsule (Gelatin), Rice Powder, Microcrystalline Cellulose, Magnesium Stearate

Products manufactured with Good Manufacturing Practice facilities in the United States

We use only the highest quality ingredients in efficaciously dosed formulas

We independently test each lot before releasing products to our customers


Frequently Asked Questions

  • What are the suggested directions for using Bigger By The Day®?

    Take 4 capsules once daily with food. As a suggestion, you may take 2 capsules twice daily with food. For optimal results, take with high protein meals.

  • Why is Bigger By The Day® the best Natural Muscle Builder on the market?

    5% Nutrition Bigger By The Day features a huge 1-gram dose of Ajuga Extract! We’ve taken the most effective natural muscle-building ingredients available and combined them together in this outstanding formula. These ingredients include Turkesterone, Epicatechin, HICA, and Leucine. What a combination! We also added the ultimate absorption enhancer, Bioperine® Black Pepper. This is what hardcore is all about!

  • What is the optimal training style for people taking Bigger By The Day®?

    While Bigger By The Day® will work with any resistance-based exercise training style, it is ideal for pump-based workouts using medium to high volume and 70-75% 1RM for reps in the 8-12 range. Keep rest between sets to 30 seconds.

  • What 5% Nutrition® products can I stack with Bigger By The Day®?

    All Day you May®, Freak Show®, Shake Time or your favorite 5% protein source, Kill It Reloaded or your favorite 5% pre-workout, Test Booster, Freak Show, Crea-TEN®, and any of our Pre-Workouts may all be taken with Bigger By The Day®.

  • Who can use Bigger By The Day®?

    Bigger By The Day® can be used by anyone 18 years of age or older and is safe for women to take, but you should consult a doctor on how or what to take. As a company we never recommend any testosterone boosters to women. On that note, we do realize there is sometimes a need for women to elevate their testosterone naturally.

  • Do I need to cycle Bigger By The Day®?

    No, you do not need to cycle Bigger By The Day®.

  • Does Bigger By The Day® contain any ingredients that will come up on a drug test?

    Bigger By The Day® does not contain any ingredients that are on the World Anti-Doping Agency List 2021 (WADA). The FDA has placed 5-Alpha-Hydroxy-Laxogenin on their Ingredient Advisory List though.

  • What are the Bigger By The Day® capsules made from?

    We use bovine gelatin in those capsules.


  1. Ecdysteroids Research Breakdown |
  2. Gorelick-Feldman, J., Cohick, W., & Raskin, I. (2010). Ecdysteroids elicit a rapid Ca2+ flux leading to Akt activation and increased protein synthesis in skeletal muscle cells. Steroids, 75(10), 632–637.
  3. Dinan L. (2001). Phytoecdysteroids: biological aspects. Phytochemistry, 57(3), 325–339.
  4. Gutierrez-Salmean, G., Ciaraldi, T. P., Nogueira, L., Barboza, J., Taub, P. R., Hogan, M. C., . . . Ramirez-Sanchez, I. (2014). Effects of (−)-epicatechin on molecular modulators of skeletal muscle growth and differentiation. The Journal of Nutritional Biochemistry, 25(1), 91-94;
  5. Fraga CG, Litterio MC, Prince PD, Calabró V, Piotrkowski B, Galleano M. Cocoa flavanols: effects on vascular nitric oxide and blood pressure. Journal of Clinical Biochemistry and Nutrition. 2011;48(1):63-67;
  6. 1. Mero, A. A., Ojala, T., Hulmi, J. J., Puurtinen, R., Karila, T. A., & Seppälä, T. (2010, January 05). Effects of alfa-hydroxy-isocaproic acid on body composition, DOMS and performance in athletes. Retrieved from
  7. Duan, Y., Li, F., Liu, H., Li, Y., Liu, Y., Kong, X., Zhang, Y., Deng, D., Tang, Y., Feng, Z., Wu, G., & Yin, Y. (2015). Nutritional and regulatory roles of leucine in muscle growth and fat reduction. Frontiers in bioscience (Landmark edition), 20(4), 796–813.

Product Warnings

Not intended for persons under the age of 18. Do not use if pregnant or nursing. Consult a health care professional prior to consumption if you have any pre-existing medical conditions including but not limited to: diabetes, high or low blood pressure, heart, liver or kidney disease, cardiac arrhythmia, stroke or are taking any prescription medication.
Store in a cool, dry place away from sunlight and with lid tightly secured.
†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.
 WARNING: Consuming this product can expose you to chemicals including lead, which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to