Magnum Nutraceuticals

G-Spring , 96 Capsules

Nighttime Use Capsule for Building Muscle*
Ideal Before Bed to Feed Muscles, Help Sleep, and Fuel Recovery
9.7  out of 10  (17 Reviews)
1 Size
96 Capsules
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Product Overview


Magnum G-SPRING® Burn fat and build lean muscle while you sleep? It’s not a dream.

Magnum G-Spring helps you lose fat, grow muscle and recover – all while you enjoy a deep, restful, sleep.*

G-Spring is a multi-ingredient formulation that effectively supports resting GH levels while you sleep.*

Now you can train harder, recover better, burn fat more efficiently, and, at the end of the day, fall into a deep sleep for improved recovery.*



  • Your REM sleep each night*
  • Your recovery from working out*
  • Your lean muscle gains*
  • Your body fat levels*
  • The amount of GH you release each night*


  • Support GH release while you sleep*
  • Allow the complete absorption of all ingredients*
  • Cross the blood-brain barrier effectively*


  • 100% Pharmaceutical Grade ingredients for better, faster results.
  • Formulated to not only support GH levels, but also to enhance your body's ability to fall into deep REM sleep faster and for longer.*
  • Encapsulated for maximum absorption – delivering the same effective dose every time you take it as compared to tableted GH supporting supplements.*
  • University studied and clinically tested ingredients.

Magnum G-SPRING® features the ultra-effective ingredient Puerarin (98%). Puerarin is an isoflavone found in varying potencies in plants such as Kudzu, but standardized for effectiveness in Magnum G-SPRING®. Isoflavones often act as phytoestrogens, influencing sex hormones and protein synthesis in humans. Studies show Puerarin can help support insulin function and estrogen balance, both of which create a more anabolic environment in your body.* Puerarin does this by stimulating the GHRH receptor to support GH release.* The GHRH pathway is an effective secondary pathway for GH release and the use of Puerarin has a huge effect on supporting circulating GH.*

Magnum G-SPRING® features the ultra-effective ingredient Puerarin (98%). Puerarin is an isoflavone found in varying potencies in plants such as Kudzu, but standardized for effectiveness in Magnum G-SPRING®. Isoflavones often act as phytoestrogens, influencing sex hormones and protein synthesis in humans. Studies show Puerarin can help support insulin function and estrogen balance, both of which create a more anabolic environment in your body. Puerarin does this by stimulating the GHRH receptor to increase GH release.* The GHRH pathway is an effective secondary pathway for GH release and the use of Puerarin has an effect on supporting circulating GH.*

Induction of growth hormone release by Pueraria thunbergiana BENTH.

Authors: Jung DY, Ha H, Kim C. Drug Research and Development Team
Source: Korea Institute of Oriental Medicine, 129-11 Chungdam-dong

Magnum G-SPRING® was formulated with the necessary clinical dose of Puerarin (98%) Extract needed to support GHRH.*

Magnum G-SPRING® also utilizes Mucuna Pruriens (50% L-Dopa) to provide L-Dopa in an absorbable form that can effectively cross the blood-brain barrier. Once L-Dopa crosses the blood-brain barrier it is converted to Dopamine, which allows for a greater stimulation of GHRH (growth hormone releasing hormone) and increased growth hormone production. Mucuna Pruriens is an Ayurvedic Herb that has L-Dopa-increasing qualities. Dopamine is the pleasure/motivation hormone in humans, known for its stimulating effect on testosterone synthesis, while it also aids growth hormone secretion through the pituitary gland (because it stimulates the pituitary gland, which then stimulates the production of your key hormones).* Dopamine acts upon your central nervous system and, in concert with other neurotransmitters, plays a vital role in motivation, attention, memory, mood, relaxation, sexual desire, sleep and many other areas. Regularly using stimulants like caffeine, high levels of sugar, nicotine and other drugs can lead to a lowering of dopamine production in the brain and leave you feeling edgy, craving food, restless and unable to relax.

Magnum G-SPRING® contains a high dose of Melatonin, which has been suggested to support GH secretion through a secondary none GHRH pathway.* A study published in Clinical Endocrinology indicated that oral administration of melatonin to normal human males increases basal GH release and GH responsiveness to GHRH through the same pathways as pyridostigmine, a cholinergic agonist, which is likely to suppress hypothalamic somatostatin release.

Melatonin stimulates growth hormone secretion through pathways other than the growth hormone-releasing hormone.

Authors: Valcavi R, Zini M, Maestroni GJ, Conti A, Portioli I.
Source: Clin Endocrinol (Oxf). 1993 Aug;39(2):193-9.

Melatonin plays a facilitatory role at the hypothalamic level by inhibiting endogenous somatostatin release. This increases both GH levels and GH’s responsiveness to growth hormone releasing hormone.*

Another ingredient in Magnum G-SPRING® is Bacopa monniera 30:1 (50% bacosides A&B). This adaptogen has antioxidant properties. It also promotes memory, concentration, and enhances visual processing.* Bacopa plays a supportive role in HGH production by repairing damaged neurons and allowing the pituitary to secret HGH at an optimum level. But Bacopa's effects on the thyroid gland may be the most critical. Research suggests it can support muscle growth and fat loss.*

L-Arginine Pyroglutamate and L-Lysine have been combined in Magnum G-SPRING® because they work synergistically to support GH levels. Studies indicate that these two amino acids can work together to instigate the release of growth hormone. In 15 healthy male subjects aged 15 to 20 years old, Arginine Pyroglutamate combined with L-lysine hydrochloride significantly elevated biologically active growth hormone from two to eight times the baseline value at 30 to 120 minutes after consuming the amino acids.*

A study of growth hormone release in man after oral administration of amino acids.

Authors: Isidori A, Lo Monaco A, Cappa M.
Source: Curr Med Res Opinion. 1981;7:475.

L-Arginine Pyroglutamate and L-Lysine work together, as opposed to individually, to increase GH levels between 2 and 8 times that of baseline.

Other GH- or sleep-boosting ingredients in G-SPRING® are:

DMAE Bitartate, which elevates Choline levels in the brain more effectively than Choline itself, regulating HGH release, enhancing mood, memory and learning. It’s often used for its mild stimulant effect, yet DMAE also makes it easier to fall asleep. This reduces fatigue during the day.

L-Theanine is known for its beneficial mental and physical relaxation properties due to its ability to increase levels of GABA (gamma-amino-butyric acid), an important inhibitory neurotransmitter in the brain. Taking Theanine before bed will help you sleep better and also increase GH release.*

Vitamin D has been suggested to increase circulating IGF-1 and IGF binding proteins (IGFBP-3), while administration of growth hormone and IGF-1 has been shown to increase Vitamin D levels in several studies.* There's no conclusive information on mechanisms, but it is well established that IGF-1 stimulates the synthesis of 1,25(OH)2D in the kidney, and it is possible that vitamin D promotes production of IGF-1 and IGFBP-3 in the liver by directly inducing the transcription of the relevant genes or by promoting growth hormone stimulation.

Piperine Extract (95%) has been included in G-SPRING® for its ability to increase both absorption and active nutrient transport of all the ingredients in G-SPRING®, making it more potent than products that do not include this standout ingredient. A study by scientists from Annamalai University in India (Vijiyakumar. 2006) showed that Piperine extract significantly reduced blood lipid levels and lipoprotein levels. It also supported T3, T4 and testosterone levels, making it an excellent inclusion in Magnum G-SPRING® for overall fat loss, hormonal health, and nutrient bioavailability.*


Anyone who whats to:

Fall asleep quicker and deeper every night*

Support GH release while they sleep*

Build lean muscle tissue while they sleep*

Lose fat faster*

Increase their energy during the day*

Improve their recuperative abilities post workout*

Use a scientifically validated GH supporting product*


1. Ensure you are being supplied with active Pharmaceutical Grade natural GH supporting ingredients.*

2. Allow athletes to train hard every day and then recuperate properly at night. *

3. Increase the rate by which you can achieve your physique goals by capitalizing on the hours you sleep to increase fat loss and lean muscle gains. *

Frequently Asked Questions

Are there any products you recommend to take with Magnum G-SPRING®?

Yes, Magnum G-SPRING® has been formulated to work synergistically with Magnum THRUST®, Magnum E-BRAKE®, Magnum MIMIC®, Magnum VOLUME®, and Magnum TONIC®. But Magnum G-SPRING® can be stacked with any of Magnum’s products for your own unique stack.

When is the best time to take Magnum G-SPRING®?

Magnum G-SPRING® is best taken 30 minutes prior to bed.

How quickly can I expect results from Magnum G-SPRING®?

Many consumers say they notice a rapid descent into deep sleep from the very first time they use Magnum G-SPRING®. Enhanced wellbeing, recuperation, and daytime energy is usually felt within the first 5 days of use. When combined with training and a healthy diet, physical changes –such as leaner muscles and an increase in strength will follow.

Ratings & Reviews

Overall Rating
17 Ratings
Verified Buyer Rating
1 Ratings
By clicking the button above, you agree to entering the Bodybuilding.com Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
Mar 18, 2018

I have always had issues falling asleep and quality of sleep but since taking g spring I fall asleep easily and stay asleep. I also have never woken up groggy like I have with other products to help me sleep. This is a staple product I use and I definitely notice a huge difference in falling asleep and feeling rested if I do not take it. I would recommend this product to everyone! - Magnum Athlete

Sep 10, 2017

G SPRING! I noticed deeper sleep the very first time taking. WOW. I train twice a day, and feeling more rested is such an incredible feeling I have never felt before G SPRING. 100% worth a try. DO YOURSELF A FAVOR -MagnumAthlete

Aug 04, 2017

For anyone who has issues sleeping or work shift work.. This is your product. Traditionally most would just take Melatonin at whatever dose they are comfortable with. G-Spring offers science based ingredients that not only help your gym performance but also enhances your sleep and REM sleep leaving you ready to tackle the day. You cannot get the same sleep out of just melatonin I guarantee you!

Feb 24, 2017

Hands-down the strongest sleep and growth formula on the market! I absolutely loved the deepness of sleep and clarity of dreams these ingredients provided. Having L-Arginine Pyroglutamtae, L-Lysine & L-Dopa to secrete Growth Hormone while the cognitive-support blend of Bacopa Monniera, Puerarin, L-Theanine & DMAE enhanced deep rem sleep was truly a phenomenal experience. Best of all, the 20mg of melatonin allowed me to easily fall back asleep after waking up to use the bathroom and drink a protein shake throughout the night (about 2-3x) and also after eating breakfast even after being awake for 1-2hrs which proved to be extremely beneficial! Since the formula is so powerful, it can be taken as soon as 10-20min prior to bedtime. Most importantly, when stacked w/Thrust & E-Brake my lifting records were absolutely shattered: deadlift up by 25lb, incline bench by 15lb and physique noticably thicker! I highly recommend this product to everyone, regardless of exercise experience/level for the astounding mental & physical rejuvenation!

Feb 09, 2017
Verified Buyer

Love it!! It definitely helps me get a deeper, more restful sleep. This is a crucial factor in gaining lean mass. It's strong and I take half the recommended dose. I'm one of those picky people when it comes to artificial colors, so I just pop open the powder filled gelatin capsules and mix the powder in water. (The color is on the capsules) If the company just sold it in powder form, I'd buy that. G-spring is working so well, will absolutely reorder. My husband tried it and likes it as well, so I'll probably be ordering sooner than I think!

Dec 04, 2016

You essentially take 4 caps about 30 min before bed time. It is suppose to help "support muscle growth and fat loss." This part, I do not know if it did, maybe if I take it longer I will have more noticeable results from it, hard to say in only 30 days. The one thing about it I did notice was after about 2-3 days I was getting a better, deeper sleep. Which is something else they say it can do. And for me, it did just that. When I woke up, even after some of my odd hrs and long days in a row of work, I felt refreshed and more awake than in the past few months. I will say this, I may have sabotaged the first part of my statement with Mass Gainer I was taking with it. But like I said, I did sleep better and you truly need your rest for working out. Overall Performance - 9/10

Nov 18, 2016

My sleep has improved SO MUCH with G-spring! I wake up feeling totally refreshed and ready to tackle the day. I also find my body needs less recovery time after a workout and I have less DOMS

Oct 10, 2016

G-spring has been my bedtime miracle! I have always had a hard time falling asleep and staying asleep since I can remember. To add to my sleep frustrations, I struggled with hormone imbalance and adrenal fatigue after my last competition prep which made having a solid nights sleep almost impossible. I was considering prescription sleep aids until I came across this little gem. Its powerful stuff! I am out cold within one hour of taking it, and stay I asleep all night and there is absolutely NO morning grogginess! Two thumbs way up!

Oct 03, 2016

Helped me tremendously with getting out of bed awake and alert. The sleeping part was never hard for me, it was the grogginess in the mornings. With G Spring that issue disappears.

Jun 03, 2016

I absolutely LOVE this product! I tend to have difficulty getting a good sleep at night. My sleeps can be inconsistent and also with going to bed early in the evening sometimes I have trouble falling asleep. Ever since I started taking G-Spring, I have been getting the BEST sleeps. I fall asleep and have a great steady, consistent sleep. When I wake up, I'm not groggy at all. Even if I only get minimal sleep, I never notice anything different compared to getting a long nights sleep. These deep, great sleeps truly help my body and muscles recover and rest so that I can go 150% the next day!

May 02, 2016

This is one of the best products I've ever used. I took it as directed and it helped in SO many ways! I definitely got much better sleep when using this product! That was the greatest benefit of all to me. I also noticed some weight loss. I used the product for a month consistently. It is a bit pricey, but you get what you pay for in this case. I would definitely recommend this product!

Feb 06, 2016

While it might be pricey, Magnum Nutraceuticals "G-Spring" is a product that delivers. While I didn't notice any "knock-out" sleep effects (i.e., I didn't feel drowsy or stay asleep the entire night while on it), there was definitely an increased recovery factor. The 20 mg of melatonin is a bit high, but I didn't notice any adverse side-effects. Rather, I would wake up in the morning feeling 100% refreshed and ready to go; my morning workouts were done at high-energy and I was wide-awake even at 4 A.M. Definitely a product worth investing in if your recovery is lacking!

Jan 27, 2016

I am rating this G-Spring a solid 10 because it delivers a great nights deep sleep. It is too strong for my personal taste but that means I can use half doses and make the bottle last twice as long. At the full dose of 4 caps, G-Spring is strong enough to knock me out. I have used melatonin off and on for a long time and at only 5mg it helps me sleep if I lay down after taking it. This G-Spring here at the full dose hits with 20mg melatonin and has me out like a broken lightbulb for the entire night. With the addition of the other ingredients I never wake up with the hangover feeling I get from plain melatonin. And if you dream at night this works like an enhancer (to me) and delivers not only a deep restful sleep but it provides me with super vivid dreams. I highly recommend this to anyone who needs that good sleep to help grow.

Dec 19, 2015

This is the first product that I have taken from this company and I'm very pleased with this product. I have taken the entire bottle. I noticed the this product has Melatonin in it and I new just from that ingredient it should help me with sleeping. As a night shift worker I sometimes have trouble sleeping during the day and also staying asleep. While taking this product I was able to fall asleep faster and I tended to get up to 7 hours of sleep or more. I didn't feel groggy after waking up like I have with other sleep aide products. Overall I liked the product and would recommend it to any who has trouble with either falling asleep or staying asleep.

Dec 06, 2015

Another awesome supp from MAGNUM.If you have trouble sleeping like I do,this is for you.I usually have trouble falling and staying asleep at night and only get 4-5 hours a night most nights,but since taking G-Spring I have been able to fall,stay and get more quality sleep on a nightly basis.I feel less groggy throughout my days and my mood is a lot better and I seem to be thinking more clearly as well.I also noticed that I dream a lot which is probably due to the fact that I get better and longer restful sleep.I will definitely be using G-Spring again,it will be a regular in my supp arsenal.

96 Capsules
96 Capsules
24 Servings | $1.79 Per Serving

What's in Magnum Nutraceuticals G-Spring

Serving Size 4 capsules
Servings Per Container 24
Amount Per Serving % Daily Value
Vitamin D3 (As Cholealciferol) 1,000 IU 250%
L-Arginine Pyroglutamate 1,000 mg
L-Lysine 1,000 mg
Mucuna Pruriens (Velvet Bean) (50% L-Dopa) 300 mg
Bacopa Monniera 30:1 Extract (50% Bacosides A&B) 220 mg
Puerarin (Radix puerariae) 100 mg
L-Theanine 100 mg
DMAE Bitartrate 100 mg
Melatonin 20 mg
Piperine Extract (95%) 5 mg
† Daily Value Not Established
Other Ingredients:
Microcrystalline Cellulose, Silicon Dioxide, Magnesium Stearate, and Certified Halal and Kosher Gelatin Capsules, (FD&C Blue #1, Red 3, Yellow 6).

Directions For G-Spring: Take 4 capsules 30 minutes before bed. 

Warnings: Do not use if you are under 16 years of age, pregnant or nursing. Consult your physician before use if you have a medical condition or are taking any prescription drugs. Do not use if you have had a myocardial infarction (heart attack).

* 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.
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