Monster XL ®
🇬🇧

Customer Rating:
5/5

Looking for sustained energy in everyday life, during training, and in the bedroom? Monster XL® combines beta‑hydroxybutyrate salts (magnesium, calcium & sodium BHB) with essential minerals to keep you performing at your best.

❓ Why Monster XL?

  • Contributes to a normal energy‑yielding metabolism (magnesium, calcium)
  • Supports protein synthesis (magnesium)
  • Maintains normal muscle function (magnesium, calcium)

These health benefits are authorised by the European Food Safety Authority (EFSA).

🎯 Your Goal: Higher Testosterone & Strong Performance — How Monster XL Helps

IngredientDaily Serving (2 capsules)Potential BenefitResearch Snippet
Magnesium‑BHB400 mg (120 mg Mg)Contributes to normal testosterone, supports protein synthesis & energyPubMed 20352370
Calcium‑BHB300 mg (42 mg Ca)Cofactor in hormone‑release signalling pathwaysPubMed 9000157
Sodium‑BHB100 mg (27 mg Na)Rapid ketone energy, heightened mental focusPubMed 30286675


Additional effects are based on early clinical data and are still under investigation.

⚙️ How Monster XL Works – The 3‑Phase Boost

  • Ketone Kick (0‑30 min) – Free BHB ions cross the blood–brain barrier for sharp focus and drive.
  • Mineral Reload (30‑120 min) – Magnesium & calcium replenish stores and support natural testosterone processes.
  • Long‑Term Support (from day 7) – Consistent use helps keep energy & performance high.

Tip: Take 2 capsules with water in the morning, or 1 capsule in the morning + 1 before training.

🗣️ Customer Voices – Real‑World Experiences

Jonas (31), London: “I was sceptical, but after two weeks on Monster XL I feel noticeably stronger in the gym—my partner notices the difference too 😉.”

Kamal (28), Birmingham: “The mix of ketone energy and minerals convinced me. No crash, but way more focus.”

Luke (44), Manchester: “Finally a supplement with an honest formula. My blood‑work stayed solid and I’ve got more day‑to‑day energy.”

Reviews verified via Trustpilot; individual results may vary.

🔬 Science & Transparency

We believe you should take only what you understand. Find every cited study and further research on our page scientific insights into Monster XL — concise, readable and with DOI links.

✅ Quality You Can Trust

  • Made in the UK – produced in an ISO 22000 & GMP‑certified facility
  • Lab‑tested – every batch screened for purity & heavy metals
  • Vegan & filler‑free – HPMC capsule shell, no animal ingredients

Learn more about our mission and the team behind the brand on our story.

🛒 Your Order – Direct from the Manufacturer

  • Free UK delivery on orders over £40
  • 30‑day money‑back guarantee
  • Secure SSL checkout

Get Monster XL® now

❓ Frequently Asked Questions (FAQ)

How long does one bottle last?

60 capsules cover 30 days at the recommended daily intake of 2 capsules.

Can I combine Monster XL with other supplements?

Yes—just keep an eye on your total daily intake of magnesium & calcium from all sources.

From what age is it worthwhile?

Generally from 18 years. If you have medical conditions or take medication, please consult a healthcare professional first.

Still have questions? Drop us a line via our contact form — we reply within 24 hours on weekdays.

📋 Ingredients & Nutrition (per 2 capsules)

NutrientAmount%NRV
Magnesium‑BHB (of which Mg)400 mg (120 mg)32 %
Calcium‑BHB (of which Ca)300 mg (42 mg)5 %
Sodium‑BHB (of which Na)100 mg (27 mg)
Capsule shell (HPMC)

NRV = Nutrient Reference Value according to EU Regulation 1169/2011

📚 Footnotes & Sources

1. Cinar V. et al. Effect of magnesium supplementation on testosterone levels of athletes. J Med Food. 2010.
2. Cinar A., Nizamlioglu M. Calcium, exercise and testosterone response. Int J Sports Med. 1996.
3. Stubbs B.J. et al. Exogenous ketone β‑hydroxybutyrate salts improve exercise performance. Front Physiol. 2018.

⚠️ Legal Notice / Disclaimer

Food supplements are not a substitute for a balanced diet and healthy lifestyle. Do not exceed the recommended daily dose. Pregnant or breastfeeding women, and anyone under medical supervision, should consult a doctor before use. The statements regarding beta‑hydroxybutyrate are based on preliminary clinical observations and are not intended to diagnose, treat, cure, or prevent any disease. Authorised health claims refer solely to magnesium and calcium in accordance with Regulation (EC) 1924/2006.

Ready to elevate your energy levels to the next plateau? Monster XL® is waiting for you!

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