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Exercise recovery support, Restful sleep support, Endocrine rhythm support, Cognitive and mood balance
Adults with high-intensity training routines or those with busy schedules seeking night-time amino acid and neurotransmitter support.
Take 5 tablets once daily before exercise and/or at bedtime with plenty of water, at least 2 hours after your last meal; taking in the evening may suit ingredients linked with rest and nocturnal rhythms.
Arginine serves as a nitric oxide precursor that may influence pituitary signalling, while the pyroglutamate form is used for transport and uptake.
Caution: May cause gastrointestinal upset in some people; avoid if you have low blood pressure concerns as arginine can affect vascular tone.
Lysine is an essential amino acid that may modulate arginine availability and support normal endocrine signalling.
Caution: High doses may cause stomach discomfort; separate from high-dose calcium or iron if sensitive to amino acid competition.
GABA is an inhibitory neurotransmitter that may promote relaxation and influence neuroendocrine release patterns during rest.
Caution: May cause drowsiness or tingling; avoid activities requiring alertness until you know your response.
L-Dopa is a direct dopamine precursor that can increase dopaminergic signalling, which is linked with pituitary hormone release patterns.
Caution: Not advised with psychoactive medicines or MAO inhibitors; may affect mood or sleep sensitivity.
5-HTP is a serotonin precursor that may support calm and normal sleep architecture, influencing nocturnal endocrine rhythms.
Caution: Do not combine with SSRIs, SNRIs, MAO inhibitors, or other serotonergic agents due to risk of excessive serotonergic effects.
Amino acids such as arginine and lysine are used around exercise or bedtime to influence pituitary signalling, while GABA and 5-HTP focus on relaxation and sleep-related rhythms that align with nocturnal endocrine pulses. Velvet bean–derived L-Dopa supports dopaminergic tone, complementing these pathways that cue pituitary output.
Label Warning: Not for children, or for women who are pregnant, may become pregnant, or breastfeeding. Not advised for anyone diagnosed with any form of cancer. Seek medical advice before use if you have psychiatric disturbances, ulcers, diabetes, tremors, epilepsy, asthma, urinary incontinence, cardiac arrhythmia, high blood pressure, or carpal tunnel syndrome, or if you take warfarin (Coumadin) or any prescription medication. California consumers: reproductive harm (Prop 65).
Who should be cautious: People with bleeding risks or on anticoagulants due to ginkgo may need caution. Those on antidepressants or other serotonergic medicines should be cautious due to 5-HTP. People with Parkinson’s disease or on dopaminergic medicines should be cautious due to L‑Dopa from velvet bean. People sensitive to stimulatory or blood pressure effects should be cautious due to DMAE, GABA-related central effects, arginine, and niacin at high dose. Those with thyroid concerns or on antidiabetic therapy may wish to monitor due to chromium. If taking medications that may interact with these ingredients, discuss with a healthcare provider before use.
Storage: Keep out of the reach of children.
This product is guaranteed authentic and backed by our easy returns and refunds policy. Details
Omega-3s may support heart and brain health, beneficial for men's overall health and longevity.
AI generated. Not medical advice.
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Source Naturals HGH Surge™ is a multifaceted, Bio-Aligned Formula® for the promotion of healthy levels of natural human growth hormone. HGH Surge contains nutritional and neurotransmitter support shown to stimulate the body's production and release of human growth hormone.
5 tablets before exercise and/or at bedtime with plenty of water at least two hours after the last meal. Discontinue use or reduce dosage if any of the following symptoms are present: nausea, excessive salivation, vomiting, diarrhoea, muscle spasms, cramps, excessive urination, insomnia, headache, cardiac arrhythmias, high blood pressure, or changes in mood or emotional balance.
Silicified microcrystalline cellulose, silica, stearic acid, and magnesium stearate.
Not for use by children, women who are pregnant, may become pregnant, or breastfeeding, or anyone who has been diagnosed with any form of cancer. If you have psychiatric disturbances, ulcers, diabetes, tremors, epilepsy, asthma, urinary incontinence, cardiac arrhythmia, high blood pressure, or carpal tunnel syndrome, or if you are taking warfarin (Coumadin®), or any other prescription medication, consult your doctor before using this product.
California Consumers: Reproductive harm. Prop65 Warning.
Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children.
While iHerb strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site. Although items may occasionally be despatched with alternative packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and do not rely solely on the information provided by iHerb. This website has been machine translated as a courtesy to customers. iHerb does not represent or warrant that the translations are complete or error-free and iHerb is not responsible for any translation errors or omissions.
| Supplement facts | ||
| Serving Size: 5 Tablets | ||
| Servings Per Container: 30 | ||
| Amount Per Serving | %DV | |
| Calories | 20 | |
| Total Carbohydrate | 1 g | <1%* |
| Dietary Fibre | 1 g | 4%* |
| Protein | 1 g | 2%* |
| Niacin (as inositol nicotinate) | 400 mg | 2,500% |
| Chromium (as chromium polynicotinate [ChromeMate®]) | 200 mcg | 571% |
| L-Arginine L-Pyroglutamate | 1 g | † |
| L-Lysine HCl | 740 mg | † |
| L-Glutamine | 500 mg | † |
| L-Ornithine HCl | 500 mg | † |
| Acetyl L-Carnitine HCl | 450 mg | † |
| Glycine | 400 mg | † |
| GABA (gamma-aminobutyric acid) | 350 mg | † |
| L-Citrulline | 250 mg | † |
| DMAE (as bitartrate) | 100 mg | † |
| Ginkgo Leaf Extract (24% flavone glycosides & 6% terpene lactones) | 100 mg | † |
| Velvet Bean Standardised Extract 60% (Yielding 45 mg L-Dopa) | 75 mg | † |
| 5-HTP (L-5-Hydroxytryptophan) | 50 mg | † |
| Huperzine A (from Huperzia serrata whole plant extract) | 50 mcg | † |
| *Percent Daily Values (%DV) are based on a 2,000 calorie diet. †Daily Value not established. | ||
