Sleep - 3 in 1 Magnesium L-Threonate, L-Theanine & Apigenin for Deeper Sleep, Relaxation, Cognitive Support, and Mood Enhancement. Clinically-Proven - UK Company
by The Supplement Stack
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The Supplement Stack's 3-in-1 sleep formula combines Magnesium L-Threonate, L-Theanine, and Apigenin — a stack popularised by neuroscientist Andrew Huberman — in a single capsule product. Best for People who struggle with racing thoughts at bedtime and Those seeking a stimulant-free, non-melatonin sleep aid.
According to the AIScored 0–100 scoring system, Sleep - 3 in 1 Magnesium L-Threonate, L-Theanine & Apigenin for Deeper Sleep, Relaxation, Cognitive Support, and Mood Enhancement. Clinically-Proven - UK Company by The Supplement Stack scores 63.0/100, ranking #14 out of 24 products in Sleep Support (2026). Strongest category: Side Effects (88.0/100). Weakest: Certifications (28.0/100).
Is Sleep - 3 in 1 Magnesium L-Threo... worth buying?
“The Supplement Stack combines Magnesium L-Threonate, L-Theanine, and Apigenin—the Andrew Huberman-endorsed sleep trio—in a single capsule, scoring 63/100. Most users report faster sleep onset and deeper rest, with several noting improved next-day clarity and mood, making it worth trying if you're after both sleep quality and cognitive benefits.”
What Do Reviewers Say About Sleep - 3 in 1 Magnesium L-Threonate, L-Theanine & Apigenin for Deeper Sleep, Relaxation, Cognitive Support, and Mood Enhancement. Clinically-Proven - UK Company?
Sample excerpts from currently available source material used in this product analysis.
"Been taking these for a few months now and getting longer sleep and legs less restless"
"I take one capsule before bed, and i dream away. I dont see the need for 3 caps. I think its the Apigenin in it that helps with dreaming, as i have that on its own too with the same effect. But yeah, go for it."
"I’ve been using the 3-in-1 Magnesium L-Threonate, L-Theanine & Apigenin supplement for a few weeks now, and the difference in my sleep has been incredible. I fall asleep faster, stay asleep longer, and wake up feeling genuinely refreshed—no..."
"This is now a staple in my routine. It has made a massive difference to my sleep quality and depth. I cannot be without it."
"I bought these as the ingredients matched another I take which work really good and these were a cheaper alternative. Sorry to say they don't work despite having the same contents. So I will be paying extra for something that does work. Hen..."
How does Sleep - 3 in 1 Magnesium L-Threonate,... score?
Detailed score breakdown and key findings from our analysis of 11 reviews across 1 source.
Pros
- +Majority of reviewers report faster sleep onset and deeper, more restorative sleep
- +Magnesium L-Threonate is the most brain-bioavailable magnesium form, well-suited to sleep and cognitive support
- +Several users noted next-day cognitive clarity and mood improvements beyond just sleep
- +No reported adverse side effects across any reviews
- +All major allergens absent (gluten-free, dairy-free, soy-free)
Cons
- -Around 27% of reviewers experienced no benefit at all, suggesting significant individual variability
- -Requires 3 capsules per serving — noted as a burden by at least one reviewer
- -Not third-party tested, limiting confidence in label accuracy and dose consistency
- -At least one user reported rapid tolerance build-up, with effects fading after the first two nights
Best For
Watch Out
- !High non-responder rate — works well for some but not at all for others
- !No disclosed exact milligram doses on Amazon listing — verify label before purchasing
- !Not third-party tested; potency may vary between batches
- !Large serving size (3 capsules) may be impractical for some users
What is Sleep - 3 in 1 Magnesium L-Threonate, L-Theanine & Apigenin for Deeper Sleep, Relaxation, Cognitive Support, and Mood Enhancement. Clinically-Proven - UK Company?
Sleep - 3 in 1 Magnesium L-Threonate, L-Theanine & Apigenin for Deeper Sleep, Relaxation, Cognitive Support, and Mood Enhancement. Clinically-Proven - UK Company is a sleep support product by The Supplement Stack in capsule form, scoring 63.0/100 on AIScored.
- • ✅ 𝗘𝗫𝗣𝗘𝗥𝗧-𝗜𝗡𝗦𝗣𝗜𝗥𝗘𝗗 𝗙𝗢𝗥𝗠𝗨𝗟𝗔: Featuring precise dosages of Magnesium L-Threonate, Apigenin & L-Theanine, inspired by leading neuroscience research for optimal night-time support.
- • ✅ 𝗧𝗥𝗜𝗣𝗟𝗘-𝗔𝗖𝗧𝗜𝗢𝗡 𝗦𝗨𝗣𝗣𝗢𝗥𝗧 – Formulated to promote deep relaxation, calm, and help your body ease naturally into rest as part of a mindful evening routine.
- • ✅ 𝗠𝗔𝗚𝗡𝗘𝗦𝗜𝗨𝗠 𝗟-𝗧𝗛𝗥𝗘𝗢𝗡𝗔𝗧𝗘: A highly bioavailable form of magnesium, shown to contribute to normal psychological function and the healthy functioning of the nervous system.
- • ✅ 𝗔𝗣𝗜𝗚𝗘𝗡𝗜𝗡: A flavonoid sourced from plants, traditionally used to support tranquillity and relaxation before bed.
- • ✅ 𝗟-𝗧𝗛𝗘𝗔𝗡𝗜𝗡𝗘: Naturally found in green tea, included for its ability to promote calm focus and support the body's natural relaxation pathways.
Is Sleep - 3 in 1 Magnesium L-Threonate, L-Theanine & Apigenin for Deeper Sleep, Relaxation, Cognitive Support, and Mood Enhancement. Clinically-Proven - UK Company Independently Tested?
No Third-Party Testing Visible
We could not find evidence of independent third-party testing for this product. This doesn't mean it's unsafe, but independent verification provides additional assurance.
How We Score Supplements
Our methodology analyses review data, ingredient science, and product information, then scores each product on a 0-100 scale across evidence-based categories:
Effectiveness
How well the product delivers its claimed benefits, based on reviews and ingredient evidence.
Ingredient Quality
Bioavailable forms, clinically effective dosages, clean label, minimal fillers.
Value for Money
Price relative to ingredient quality, dosage count, and effectiveness.
Side Effects Profile
Higher score = fewer side effects. 100 means virtually no adverse reactions reported.
Certifications & Testing
Third-party lab testing, GMP certification, and independent quality verification.
Overall Score
Weighted combination of all factors. Our bottom-line recommendation.
Price History (90 days)
Quick Facts
- Form
- Capsule
- Vegan
- No
Frequently Asked Questions
Is Sleep - 3 in 1 Magnesium L-Threonate, L-Theanine & Apigenin for Deeper Sleep, Relaxation, Cognitive Support, and Mood Enhancement. Clinically-Proven - UK Company worth buying in 2026? ▼
What is the best price for Sleep - 3 in 1 Magnesium L-Threonate, L-Theanine & Apigenin for Deeper Sleep, Relaxation, Cognitive Support, and Mood Enhancement. Clinically-Proven - UK Company in the UK? ▼
What are the pros and cons of Sleep - 3 in 1 Magnesium L-Threonate, L-Theanine & Apigenin for Deeper Sleep, Relaxation, Cognitive Support, and Mood Enhancement. Clinically-Proven - UK Company? ▼
Is Sleep - 3 in 1 Magnesium L-Threonate, L-Theanine & Apigenin for Deeper Sleep, Relaxation, Cognitive Support, and Mood Enhancement. Clinically-Proven - UK Company third-party tested? ▼
Disclaimer: AIScored provides research-backed summaries based on publicly available reviews and product information. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Affiliate links may earn us a commission at no extra cost to you.
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