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Bigger By The Day Muscle Builder: Legendary Series

Bigger By The Day® is an all-natural muscle builder that is without a doubt the strongest formula of it’s kind on the market. This is a formula that’s so hardcore, only 5% Nutrition could have created it!


When it comes to natural muscle builders, there’s a number of products currently available that like to brag about how hardcore they are. You’ve seen the ads and heard the hype. Enough of the garbage out there, we’ve all listened to it long enough and decided it was time to step in and show them how the big boys do it. 5% Nutrition has defined the word 'hardcore' of the supplements world for years and has 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 and combined them into one incredible product, and we dared to make it stronger than any other product of its kind. Take a look at these ingredients:

Laxogenin – 300 mg – Also known as 5 Alpha Hydroxy Laxogenin, this ingredient is classified as a plant steroid (brassinosteroid) that has two primary benefits: the ability to increase protein synthesis and the ability to increase strength. It also has anti-catabolic benefits, making Laxogenin a potent all-natural ingredient. (2) The effective dosing range is 75 to 150 mg so of course, we dosed it right at the top of the effective range, then doubled it!

Epicatechin (90% sourced from Green Tea extract) – 200 mg – This ingredient is a flavonol that’s commonly found in dark chocolate and green tea. This compound has both muscle growth properties and the ability to stimulate nitric oxide production for increased pumps as well as 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. By inhibiting myostatin you can effectively raise the ceiling of your potential for gains.(4,5)

HICA – 500 mg – Also known as A-Hydroxyisocaproic Acid or Leucic Acid, HICA is a metabolite of leucine, which means that when we metabolize leucine our body it 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 and then broken down further into HICA, at this point, it becomes available for use. Clinical studies have indicated that HICA can stimulate gains as well as reduce muscle soreness. (1)

Leucine – 200 mg -  Leucine is one of the BCAAs and without a doubt the most powerful of any 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. (3) By combining leucine, HICA, and laxogenin, 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, and 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, improving absorption of ingredients such as nutrients and ingredients found in supplements (6)

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

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supplement facts

  • USA
Serving Size: 3 Capsules Servings Per Container: 30
Per Serving % Daily Value
Vitamin A (as retinol palmitate) 1,500 mcg 167%
Calcium (as dicalcium phosphate)45 mg5%
Alpha Hydroxyisocaproic Acid (HICA)500 mg*
5a-Hydroxy Laxogenin (from Smilax officinalis extract (root))300 mg*
L-Leucine200 mg*
Green Tea Extract (90% Epicatechin)200 mg*
Black Pepper Extract (Piper nigrum)(fruit)(Bioperine®)10 mg*
*Daily Value not established
Other Ingredients: Capsule (Gelatin), Rice Powder, Magnesium Stearate, Silicon Dioxide


  • Improves Protein Synthesis

  • Promotes Lean Muscle Growth

  • Decreases Workout Recovery Time

  • Plant-Based Muscle Builder


Frequently Asked Questions

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

    On your first 2 days, take 1 capsule with your first meal of the morning and 1 capsule with a light high protein snack before bed. On day 3, increase to 1 capsule 3 times a day (with breakfast, lunch and dinner). Do not exceed more than 3 capsules per day.

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

    Bigger By The Day® contains the most powerful natural muscle building ingredients available. We have combined 4 potent all-natural muscle builders into one generously dosed formula. We have also included a potent absorption enhancer to insure optimal results. You know 5% Nutrition®, there is nothing else this hardcore on the market!

  • 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 intense workouts using medium to high volume and 70-85% 1RM for reps in the 6-12 range that include beyond failure techniques.

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

    All Day you May®, Freak Show®, Post Gear®, and Drink Sleep Grow®, 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® 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®?

    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.      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

2.      Esposito, D., Komarnytsky, S., Shapses, S., & Raskin, I. (2011, October). Anabolic effect of plant brassinosteroid. Retrieved from


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;


Product Warnings

† 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