ZMA increased testosterone by more than 30% and IGF-1 by 4%.

Optimum Nutrition ZMA, 180 Capsules

ZMA - the trio of zinc, magnesium aspartate and vitamin B₆ increased testosterone by more than 30% and IGF-1 by 4%.

Magnesium

Sufficient magnesium in diet boosts post-cancer survival chances25.08.2017
Magnesium is an antidepressant 12.08.2017
Magnesium protects against hardening of the arteries, high blood pressure and diabetes 08.04.2017
Magnesium supplement lowers blood pressure 17.12.2016
Magnesium, vitamin B2 and co-enzyme Q10 combo soothes migraine26.09.2015
Short-term magnesium supplementation boosts maximal strength31.07.2015
Dirt-cheap magnesium supplement improves sleep 10.04.2014
Magnesium and vitamin B6 combination mitigates ADHD 06.03.2014
Diet rich in magnesium, betacarotene and vitamins C and E protects your hearing 02.02.2014
More magnesium, longer life expectancy 27.12.2013
Magnesium-rich diet reduces mortality risk 10.11.2013
Lower fat percentage with sufficient magnesium in diet 04.02.2013
Magnesium supplement prevents migraine 26.12.2011
Magnesium supplement helps you perform to the max despite lack of sleep16.12.2011
Magnesium halves hot flashes 04.10.2011
Magnesium makes protein supplements less dangerous, study suggests04.09.2011
More magnesium means more testosterone and IGF-1 06.08.2011
One gram magnesium raises testosterone level by a quarter 28.04.2010
Epidemiological study: more muscle power with more magnesium19.10.2009
More magnesium, more free testosterone 11.11.2008

Zinc

More chance of depression and dementia in old people with low zinc levels11.05.2017
Zinc deficiency can make you crazy 08.05.2017
Get over your cold quicker with a hefty dose of zinc 21.08.2015
High dose of zinc helps you get over a heavy cold faster 27.12.2011
Zinc megadose gives 40 percent more free testosterone 14.11.2009
It really works - zinc is a testosterone booster 13.11.2009
Study: ZMA does not raise testosterone levels 07.04.2009

Vitamin B

B-vitamin supplementation halves chance of aggressive skin cancer20.07.2017
Vitamin B2 reduces muscle breakdown during ultramarathon and speeds up recovery 05.07.2017
Vitamin B6 helps over 60s stay mentally fit 31.03.2017
Lots of folates = strong muscles 11.02.2017
What did you just say? Nicotinamide riboside reduces endurance capacity?24.12.2016
This is the safe dose of nicotinamide riboside 02.11.2016
Anti-aging vitamin keeps diabetics healthy 04.10.2016
Nicotinamide riboside extends life expectancy and rejuvenates muscles09.09.2016
Algae and mushrooms not a full alternative for vitamin B12 supplements01.08.2016
Nicotinamide-riboside transforms muscle cells into super muscle cells27.07.2016
Fursultiamine makes physical exercise less tiring 09.06.2016
Vitamin B6, the dream vitamin 11.02.2016
Vitamin B5 beats acne 03.01.2016
Hefty dose of vitamin B5 helps damaged tendons heal quicker 24.12.2015
Combination of B vitamins and fish oil reduces age-related brain atrophy21.07.2015
Vitamin B12 inhibits mental decline in the elderly 17.08.2014
High-thiamine diet reduces chance of depression 08.03.2014
Magnesium and vitamin B6 combination mitigates ADHD 06.03.2014
50 mg vitamin B1 supplement improves your mood and speeds up your reactions 02.03.2014
This is how the slimming vitamin biotin works 04.01.2014
High dose of biotin sabotages fat cell growth 01.01.2014
Multivitamins: not such a crazy idea 23.07.2012
Doping test confuses sulbutiamine with boldenone 18.11.2010
Legal vitamin B1 analogue boosts stamina 24.12.2009
More biotin, more IGF-1 04.08.2009