Ergogenic supplements and performance nutrients for active individuals: Hidden risks and adverse reactions rarely discussed

The Australian Institute of Sport (AIS) categorizes ergogenic aids into four distinct tiers: Group A (substantiated efficacy: creatine, caffeine, beta-alanine, sodium bicarbonate, whey protein), Group B (emerging evidence), Group C (devoid of meaningful benefit), and Group D (prohibited/dangerous substances). Novice athletes frequently waste resources on Group C or D products (unregulated 'testosterone boosters', exotic fat burners) while neglecting fundamental energy balance and restorative sleep.

Independent laboratory testing repeatedly detects undeclared pharmacological agents in commercial over-the-counter sports supplements. Chief risks include contamination with anabolic-androgenic steroid precursors (DHEA, nandrolone derivatives) and adrenergic stimulants (DMAA, octopamine, ephedrine analogues) capable of triggering cardiac arrhythmias, hypertensive crises, and anti-doping violations. Plant proteins may harbor heavy metal residues (lead, cadmium). Certified programs like Informed-Sport or Cologne List mitigate these risks.

Excessive consumption of multi-ingredient pre-workout powders packing extreme caffeine loads (300–500 mg per scoop) provokes acute tachycardia, arterial hypertension, severe insomnia, and central nervous exhaustion. Chronic protein overconsumption without adequate hydration stresses renal clearance in predisposed individuals. Furthermore, mega-dose green tea extracts (high EGCG) and unregulated fat burners have triggered Drug-Induced Liver Injury (DILI). Supplementation must remain targeted and clinically supervised.