The global market for dietary supplements, valued at roughly $212bn in 2025 and forecast to approach $415bn by 2033, is being propelled not by pensioners or athletes but by millennials and Generation Z. In the United States, these cohorts represent just over a third of the adult population yet account for more than 41% of supplement spending, a shift that has transformed a niche sector into one of the most dynamic corners of the consumer economy. Viewed from Moscow, where the phenomenon is equally pronounced, Russian analysts note that younger consumers now discuss cortisol levels with the same gravity their parents once reserved for blood pressure, ordering magnesium and adaptogens at three in the morning between work calls.

The appetite for biological optimisation extends far beyond pills and powders. In Buenos Aires, specialists marking World Book Day emphasised that reading activates brain regions tied to emotion and imagination, framing literacy as a form of cognitive therapy. Spanish wellness experts, citing Harvard-affiliated researchers, argue that rising early constitutes the day’s first victory, reducing anxiety and improving performance, while a German study from the Technical University of Munich found that alcohol-free beer can provide up to 27% of the daily requirement for vitamin B6, a nutrient critical for brain function and immunity.

Yet the pursuit of peak performance is shadowed by the very biology it seeks to master. Dietitians caution that nocturnal sweating, particularly in women, stems from minute hormonal fluctuations in oestrogen and progesterone that disrupt thermoregulation, a problem exacerbated by the elevated cortisol that wellness influencers love to vilify. As Time magazine recently clarified, cortisol is not the villain of social media lore but a circadian ally, surging before dawn to ready the body for the day, and its demonisation risks misunderstanding a hormone essential to survival.

Meanwhile, the male circadian rhythm imposes its own discipline: testosterone peaks in the early morning and troughs by evening, a daily cycle that explains why energy flags by late afternoon. The most adventurous—and risky—frontier involves peptides, chains of amino acids that adherents claim can accelerate fat loss, smooth skin, and slow ageing. Despite their uncertain legal status and unregulated formulation, a peptide “club” in San Francisco maintains a waitlist of three hundred people, and the mood in Washington is permissive: Health Secretary Robert F.

Kennedy Jr. has voiced support, and the FDA is expected to ease restrictions on a dozen peptide compounds. The convergence of consumer demand, biological curiosity, and regulatory leniency suggests that the wellness economy will only accelerate, raising questions about where self-optimisation ends and self-experimentation begins.