Our Why

Our Why

Many supplement brands hide weak formulas behind “proprietary blends”, cheap fillers, and underdosed actives while claiming “extra strength.” We do things differently - focusing only on the nutrients that matter, in the right forms and effective dosages.

We built The Supplement Stack because, as passionate lifestyle enthusiasts, we couldn’t find products that matched our standards. After searching, testing, and coming up short, we created our own: high-strength supplements formulated with precision, synergistic ingredients, and concentrated extracts - designed for athletes, recovery, everyday wellbeing, and anyone striving to live at their best.
Our Brand

Our Brand

At The Supplement Stack, our mission is simple: set a new standard for supplements. Every product reflects our values of quality, integrity, and care. We are honest, transparent, and uncompromising - building a brand people can truly trust. Our goal is to empower healthier lives through innovation backed by science.
Our Products

Our Products

Each formula is developed with precision - synergistic ingredients at effective dosages, supported by rigorous research and refinement. Designed to meet specific needs, our products are created without fillers, shortcuts, or proprietary blends. Just targeted support you can rely on.

Featured products

The Longevity Stack
The Supplement Stack

The Longevity Stack

£22.99 £22.99
The Menopause Stack
The Supplement Stack

The Menopause Stack

£19.99 £19.99
The Sleep (Original) Stack
The Supplement Stack

The Sleep (Original) Stack

£22.99 £22.99
The Testosterone Stack
The Supplement Stack

The Testosterone Stack

£16.99 £16.99
NATURAL SCIENCE-BACKED SUPPLEMENTS

Our Mission

Too often, health is left to profit-driven corporations and pharmaceutical giants. We take a different path. At The Supplement Stack, our focus is on holistic, natural solutions built from passion, not profit. These are products we believe in and use ourselves because we hold them to the highest standard. Designed to support athletes, lifestyle enthusiasts, sports performance, recovery, and targeted health needs, our supplements utilise only research-backed ingredients at effective dosages, crafted for individuals who prioritise their long-term well-being.

Synergistic Formulas

Synergistic Formulas

Effective Dosages

Effective Dosages

Science-Backed

Science-Backed

Trusted Quality

Trusted Quality

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Don't just take our word for it

The Science Behind Our Stacks

Magnesium L-Threonate — 2000 mg (≈172 mg elemental magnesium)
Highly bioavailable magnesium salt that raises brain magnesium levels; included to support a calm pre-sleep routine and normal psychological function.
NHC-approved health claims (Magnesium): contributes to normal psychological function; contributes to the reduction of tiredness & fatigue; contributes to normal muscle function.
Key studies:

L-Theanine — 200 mg
Non-sedating amino acid that promotes relaxation (alpha-wave activity); emerging data show sleep-quality benefits via stress reduction.
Key studies:

Apigenin — 50 mg
Plant flavonoid (e.g., chamomile). Human sleep data are preliminary; included to support relaxation as part of a pre-sleep routine.
Key studies:

Key Studies

Fenugreek (50% Fenusides) — 600 mg
Traditional botanical studies for male vitality and performance; human trials report support for testosterone and training outcomes.
Key studies:

Fadogia agrestis (stem extract) — 600 mg
West African botanical featured in preclinical research; animal models show increases in testosterone and pro-sexual behaviour.
Key studies:

Zinc (as Picolinate) — 15 mg
NHC-approved health claim: Zinc contributes to the maintenance of normal testosterone levels in the blood (conditions of use apply). GB Nutrition & Health Claims Register: https://pubmed.ncbi.nlm.nih.gov/36577241/
Supporting study:

Boron — 2 mg
Trace element explored for its effects on steroid hormone dynamics and free testosterone.
Key study:

  • Comparative effects of daily and weekly boron supplementation on plasma steroid hormones and inflammatory biomarkers. Journal of Trace Elements in Medicine and Biology, 2011. https://pubmed.ncbi.nlm.nih.gov/21129941/

Purified Himalayan Shilajit — 250 mg
Standardised herbo-mineral resin; clinical research reports support for total and free testosterone in healthy men.
Key study:

Nicotinamide Riboside (NR) — 300 mg
Oral NAD⁺ precursor; repeatedly shown to raise human NAD⁺ levels.
Key studies:

GlyNAC (Glycine 500 mg + N-Acetyl Cysteine 500 mg)
Supports glutathione synthesis and redox balance; clinical work in older adults reports broad functional improvements.
Key studies:

Trans-Resveratrol — 200 mg
Polyphenol studied for metabolic and cardiometabolic support.
Key study: Calorie restriction–like effects of 30 days of resveratrol supplementation in obese men. Cell Metab, 2011 — https://www.cell.com/cell-metabolism/fulltext/S1550-4131(11)00386-X

Pterostilbene — 50 mg
Resveratrol analogue with higher oral bioavailability; human data support use for metabolic parameters.
Key study: Pterostilbene on Metabolic Parameters: A Randomized, Double-Blind, Placebo-Controlled Trial. Evid-Based Complement Altern Med, 2014 — https://pmc.ncbi.nlm.nih.gov/articles/PMC4099343/

Fisetin — 100 mg
Dietary flavonoid under active clinical investigation for healthy ageing.
Key reference: Fisetin is a senotherapeutic that extends health and lifespan. EBioMedicine, 2018 — https://pubmed.ncbi.nlm.nih.gov/30279143/

Vitamin D3 — 2000 IU
NHC-approved health claims: contributes to the normal function of the immune system and maintenance of normal bones & muscle (GB NHC Register / EFSA) — GB register link above; EFSA review: https://www.efsa.europa.eu/en/efsajournal/pub/4182

Vitamin K2 (menaquinone-7) — 100 μg
NHC-approved health claims: contributes to normal blood clotting and maintenance of normal bones (EFSA) — https://www.efsa.europa.eu/en/efsajournal/pub/1228

Ashwagandha (KSM-66® root) — 600 mg
Adaptogen to support stress resilience and sleep quality during the transition.
Key study:

Red Clover Isoflavones (≈80 mg/day isoflavones) — 200 mg extract
Non-hormonal isoflavones studied for vasomotor symptoms.
Key study:

Rhodiola rosea (std. extract) — 150 mg
Adaptogen used for stress-related fatigue and mood.
Key study:

Vitex agnus-castus (Chaste tree) — 100 mg (10:1)
Traditionally used for cyclical symptoms; strongest data are for PMS rather than menopause.
Key study:

Fennel (Foeniculum vulgare) extract — 600 mg (10:1)
Traditional use for comfort; evidence is mixed.
Key studies:

Vitamin B6 — 5 mg
NHC-approved health claims: contributes to the regulation of hormonal activity and hot flushes. https://pubmed.ncbi.nlm.nih.gov/31104511

Citicoline (Sodium Salt, USP grade) — 500 mg
Choline donor used to support attention, memory and phospholipid synthesis for healthy brain function.
Key studies:

Bacopa monnieri Extract (≥50% bacosides) — 300 mg
Traditional nootropic herb used to support memory consolidation, learning and processing speed.
Key studies:

Rhodiola rosea Extract (≥3% rosavins, ≥1% salidroside) — 200 mg
Adaptogenic root used to support mental performance, perceived stress and fatigue.
Key study:

Phosphatidylserine (from Sunflower Lecithin, ≥20%) — 100 mg
Phospholipid component of neuronal membranes; used to support cognitive performance and stress resilience.
Key studies:

L-Theanine (≥98%) — 200 mg
A non-sedating amino acid used to support calm focus and sleep quality via alpha-wave activity.
Key studies:

Lion’s Mane Mushroom Extract (30% polysaccharides) — 500 mg
Fruiting-body extract used to support cognitive clarity, memory and mood.
Key studies:

Coffee Fruit Extract (Coffea arabica fruit, ≥10% polyphenols, low-caffeine) — 100 mg
Polyphenol-rich coffee fruit used to support neurotrophic pathways (e.g., BDNF) and working memory.
Key studies:

Beta-sitosterol

Improves urinary symptoms and flow in BPH; evidence from RCT and systematic review.

Key studies:


Saw palmetto extract

Evidence from meta-analysis and RCTs for improvements in urinary symptoms and flow.

Key studies:


Nettle root extract

Used for urinary comfort; RCTs report symptom and flow support in BPH.
Key studies:

 

Pumpkin seed extract

Rich in phytosterols; human trials show improvements in IPSS and good tolerability.
Key studies:


Pygeum africanum extract

Botanical traditionally used for urinary comfort; pooled clinical data show modest but significant improvements in LUTS and flow measures.

Key studies:


Lycopene

Antioxidant carotenoid; clinical data suggest PSA and symptom support in BPH cohorts.
Key studies:

Green tea extract (EGCG)

Catechin-rich extract; human trials show favourable effects on prostate biomarkers and progression in high-risk groups.
Key studies:


Pomegranate extract

May slow PSA rise post-treatment; anti-inflammatory effects.

Key studies:


Zinc (picolinate)

Essential mineral for male hormone metabolism; human data link status/supplementation to testosterone maintenance.
Key studies:


Selenium (selenomethionine)

Antioxidant trace element; human trials show benefits to semen quality and motility.

Key studies:


Boron

Short-term human data indicate favourable shifts in free testosterone and inflammatory markers.
Key study:


Vitamin D3

Roles in cell differentiation and immune modulation within prostate tissue.

Key studies:


Vitamin K2 (MK-7)

Regulates calcification; cardiovascular support; anti-inflammatory potential relevant to ageing men.

Key studies:

Straight From Our Customers

4.50 ★ (2)
Verified
WE ARE NERDS, JUST LIKE YOU

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About

The Supplement Stack

The Supplement Stack was founded by two fitness enthusiasts who believe in the power of synergy and purity in supplements. Our journey began as we searched for high-quality, all-in-one supplements that wouldn't break the bank. We were often disappointed with fillers in products and found that purchasing individual supplements mentioned on podcasts and other sources became expensive. With a shared vision to create a better solution, The Supplement Stack was born.