Last reviewed: March 2026 · The Purest Co Editorial Team · About The Purest Co

Men are significantly underserved by the gut health conversation. Most of the marketing around probiotics, gut health supplements, and the gut-skin axis is directed at women, which has created a perception that gut health is a women's wellness topic. It isn't. Gut health affects testosterone levels, muscle recovery, immune function, metabolic health, and mood in men through the same biological mechanisms, with some important differences worth understanding.

Singapore men's dietary patterns , dominated by hawker food high in refined carbohydrates and seed oils, and low in prebiotic fibre , create systematic microbiome depletion that affects hormonal and metabolic health.

Shop Maca Ashwa Powerjuice for men's energy and vitality

How the Gut Microbiome Affects Testosterone

The connection between gut health and testosterone isn't widely known, but it's well-supported. The gut microbiome influences testosterone through two distinct pathways.

The first is through the estrobolome, which regulates not only oestrogen but the balance between oestrogen and testosterone. In men, a healthy estrobolome ensures oestrogen is efficiently cleared, maintaining a more favourable testosterone-to-oestrogen ratio. When gut dysbiosis disrupts the estrobolome, oestrogen clearance is impaired, oestrogen levels rise relative to testosterone, and the downstream effects include reduced libido, increased fat deposition (particularly around the chest and abdomen), reduced muscle development efficiency, and mood changes.

The second pathway is through cortisol. As discussed in other contexts, gut dysbiosis amplifies the HPA axis stress response, increasing chronic cortisol. Cortisol and testosterone have a direct antagonistic relationship: elevated cortisol suppresses testosterone production. Men with poor gut health tend to have higher chronic cortisol and lower testosterone, a pattern that presents as persistent fatigue, reduced motivation, and difficulty maintaining body composition despite adequate training.^[1]

Gut Health and Muscle Recovery

The gut's role in muscle recovery is underappreciated in fitness culture. Protein absorption efficiency is entirely gut-dependent. Men who train hard but have compromised gut health absorb their protein intake less efficiently, reducing the amino acid availability for muscle protein synthesis. This is one of the explanations for why two men on identical training and nutrition programmes can have significantly different recovery and muscle development outcomes.

Short-chain fatty acids from gut bacteria also directly influence muscle metabolism. Butyrate in particular has been shown to improve muscle insulin sensitivity, which affects how efficiently glucose and amino acids are taken up by muscle cells after training. A depleted microbiome producing less butyrate has measurably worse muscle metabolic outcomes.

Male Pattern Gut Dysbiosis

Research has found that men and women have somewhat different gut microbiome compositions on average, influenced by hormonal differences (testosterone itself affects microbiome composition), dietary patterns (men tend to consume less fermentable fibre), and health behaviours. Men tend to consume significantly less dietary fibre than the recommended amount, which directly limits the prebiotic substrate available to beneficial gut bacteria and reduces microbiome diversity over time.

The consequences of this pattern are particularly relevant for men: reduced testosterone-to-oestrogen ratio through estrobolome disruption, higher baseline inflammatory state from reduced SCFA production, compromised immune function, and less efficient protein and nutrient absorption.

Maca Root: The Male-Specific Adaptogen

Maca (Lepidium meyenii) is an adaptogenic root from Peru with specific evidence for male reproductive health, energy, and libido that is separate from its testosterone-raising reputation (which is less well-supported than its marketing suggests). Maca's most replicated effects are reductions in self-reported fatigue, improvements in sexual function in men with mild sexual dysfunction, and improvements in mood particularly in men experiencing stress-related motivational flatness. The mechanism appears to involve direct effects on hypothalamic function rather than hormonal changes, which makes it genuinely distinct from testosterone-boosting supplements.

The Purest Co Range for Men's Health

Maca Ashwa Powerjuice combines maca root with ashwagandha (which has the strongest botanical evidence for testosterone support through cortisol reduction) for comprehensive male energy, vitality, and stress resilience support.

Daily Pre+Probiotic Melts provides the gut microbiome foundation that underpins testosterone metabolism, protein absorption, and immune function in men.

Collagen Reforge Mango Swirl addresses the connective tissue recovery requirements of active men, supporting joint, tendon, and ligament repair alongside the structural collagen that declines with age in both skin and connective tissue.

Frequently Asked Questions

Does gut health affect testosterone?
Yes, through two pathways. The gut estrobolome regulates oestrogen clearance in men: when disrupted, oestrogen rises relative to testosterone. And gut dysbiosis amplifies cortisol production, which directly suppresses testosterone. Men with poor gut health tend to have less favourable testosterone-to-oestrogen ratios and lower baseline testosterone than their gut-healthy counterparts.

Can probiotics help with muscle recovery?
Yes, by improving protein absorption efficiency (the gut's absorption capacity determines how much of your dietary protein reaches muscle cells) and by improving muscle insulin sensitivity through butyrate production. Men with compromised gut health absorb protein less efficiently regardless of intake, directly limiting muscle recovery and development outcomes.

What is maca root good for in men?
Maca has the most consistent evidence for reducing fatigue, improving sexual function in men with mild sexual dysfunction, and improving mood particularly around stress-related motivational flatness. The mechanism appears to involve hypothalamic function rather than direct hormonal effects. It complements ashwagandha well, which addresses the cortisol-testosterone pathway specifically.

What is the best gut health supplement for men?
A multi-strain combined pre and probiotic formula addressing both Lactobacillus and Bifidobacterium families, delivered in a format that maximises live culture survival through stomach acid. Daily Pre+Probiotic Melts provides this foundation. For men focused on metabolic and testosterone support, the gut foundation combined with ashwagandha for cortisol regulation provides the most comprehensive hormonal environment support.

How does gut health affect men's energy?
Through multiple pathways: nutrient absorption efficiency determines how much energy-relevant compounds (iron, B12, B vitamins) actually reach cells from food. SCFA production from gut bacteria supports mitochondrial function. Reduced systemic inflammation from a healthy microbiome reduces the metabolic cost of the immune system's chronic activation. And testosterone support through estrobolome and cortisol regulation maintains the hormonal energy that declines with gut dysbiosis.

What are signs of bad gut health in men?
Common signs include persistent bloating or digestive discomfort, frequent loose stools or constipation without clear dietary cause, low energy that sleep doesn't fully resolve, getting sick frequently or taking longer than expected to recover from illness, skin issues (acne, rosacea, eczema) that don't respond well to topical treatment, reduced libido or mood stability, and difficulty maintaining body composition despite consistent training and diet. Several of these together, particularly alongside a history of antibiotic use, are a strong signal of gut dysbiosis.

Can gut health affect libido in men?
Yes, through the testosterone pathway. Gut dysbiosis impairs the estrobolome regulation of oestrogen clearance in men, allowing oestrogen to rise relative to testosterone. Elevated oestrogen relative to testosterone is associated with reduced libido, increased fatigue, and reduced motivation. Additionally, gut dysbiosis amplifies cortisol through the HPA axis, and cortisol directly suppresses testosterone production. Restoring gut microbiome health addresses both the estrobolome dysfunction and the cortisol amplification.

Is maca root safe to take every day?
Yes, at recommended doses. Studies using maca root typically use 1.5g to 3g of dried maca root powder or standardised extract per day, and these doses have a good safety profile in studies up to 12 weeks. Maca is a food (it's a root vegetable consumed as a staple in the Peruvian Andes) rather than a pharmaceutical, and daily use at culinary amounts is traditional. At supplement doses, consistent daily use for 8 to 12 weeks is the realistic minimum to assess meaningful effects on energy and sexual function.

References
[1] Baker JM et al. F1000Research. 2017. Estrogen-gut microbiome axis: physiological and clinical implications.
[2] Mahmud MR et al. Gut Microbiome / PMC. 2022. Impact of gut microbiome on skin health.
[3] Chandrasekhar K et al. Indian Journal of Psychological Medicine. 2012. Safety and efficacy of ashwagandha root extract.

This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with any questions about a medical condition.