The Worst Supplements Everyone Takes For Muscle Growth (Science Explained)


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Written by Jeff Nippard
Filmed by Jeff Nippard
Edited by Jeff Nippard

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In this video I’m breaking down the 5 worst supplement that are still very popular. We will discuss the science (or lack thereof) behind testosterone boosters, turkesterone, BCAAs, fat burners and beta-alanine.


About me: I’m a Canadian natural pro bodybuilder and internationally-qualified powerlifter with a BSc in biochemistry/chemistry and a passion for science. I’ve been training for 12 years drug-free. I’m 5’5 and fluctuate between 160 lbs (lean) and 180 lbs (bulked).


Disclaimers: Jeff Nippard is not a doctor or a medical professional. Always consult a physician before starting any exercise program. Use of this information is strictly at your own risk. Jeff Nippard will not assume any liability for direct or indirect losses or damages that may result from the use of information contained in this video including but not limited to economic loss, injury, illness or death.


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  1. Thank you Dr igho for the professionalism with which you did for me, You listen to your client and you always put their needs first, to ensure they live another day healthily and Vibrant. Cheers to you my doctor, for helping me boost my Testosterone.

  2. I have read the scientific study you discussed within the beta-alanine portion.
    You are missing the other benefits it gives you for weight lifting regimens. Increased growth in carnosine (helps produce more carnosine than actually taking carnosine & this helps with fatigue and muscle recovery when it breaks down). This will not be very beneficial if you are a powerlifter with 2-4m breaks. However, if you are only taking 60s-90s breaks between sets for a full 90m workout (pushing decent weight), this will help you during your training. Overall it will help you to a degree by increasing your carnosine & helping with muscle recovery (with little effect on muscle growth).

    Not gonna make you superman, but it could be an excellent placebo for your brain thinking it's going to help a lot more than it actually is. It also boosts performance after 2-4 weeks of consistently training and taking it.

    I have researched the other supplements (reading other studies); sadly, they are all a waste of time.

  3. Placebo is the most underrated “supplement”… nothing wrong with helping your body “believe” something is helping !! 💪🏻💪🏻
    Personally, what I think most of these “test boosters” users are reviewing is actually the increase of libido and “blood flow”, which psychologically might be even more important than muscles building….

  4. It was a Blessing to have met with you Dr igho you have brought up a huge smile on my face and It's gonna be permanent, because i never thought i would ever be able to get my deserved inches, all I could say now is thank you Dr.

  5. Beta alanine is great for my bouldering climbing. Some climbs can take a couple minutes, with a lot of top roping being a few minutes depending on the difficulty.

    There’s a couple climbs in my gym where you’re holding the same position making the slightest micro adjustments and having the ability to strain for just a little longer, is a godsend.

    But then again my use for it is probably different than most who use it.

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