The bottom line
The cleanest magnesium glycinate formulation available in India. Three ingredients, no argument, one expensive capsule.
Pure Encapsulations Magnesium Glycinate is a reference product in the truest sense — it is what every other magnesium glycinate supplement should be measured against. Three ingredients: magnesium as bisglycinate chelate at 120mg elemental per capsule, a vegetarian cellulose capsule, and ascorbyl palmitate as a stabiliser. No fillers. No flow agents. No magnesium oxide diluting the chelate. No undisclosed excipients. NSF certified. GMP manufactured in a US facility. Third-party tested for potency and purity. The label is exact.
The one genuine objection is price. At ₹5,699–6,500 for 90 capsules (₹66–72 per capsule), and with the therapeutic range requiring 2 capsules daily for most users, the effective cost is ₹132–144 per day. Indian-brand magnesium glycinate options — Carbamide Forte, HK Vitals, Pure Nutrition — deliver the same bisglycinate form at ₹8–25 per capsule. The question is whether you are paying for the form (bisglycinate), the certification (NSF), the formulation discipline (no fillers), or the brand. For some users, all of those matter and the price is correct. For most users, a domestic bisglycinate option achieves 90% of the outcome at 15–20% of the cost.
The formula — three ingredients, stated plainly
The absence of additional ingredients is the product's most important quality signal. The standard filler list in most Indian magnesium supplements includes: magnesium stearate (lubricant — reduces absorbability of the active mineral), microcrystalline cellulose (bulking agent), silicon dioxide (anti-caking), talc, and in cheaper formulations, a portion of magnesium oxide diluting the more expensive glycinate fraction. Pure Encapsulations contains none of these. The ascorbyl palmitate (ingredient 3) is a fat-soluble antioxidant that prevents oxidative degradation of the capsule contents during shelf life — this is a functional addition for product stability, not a filler. See the full Magnesium glycinate ingredient entry →
The mechanism — why form matters and what the evidence supports
Magnesium is a cofactor in over 300 enzymatic reactions in the human body. The relevant clinical domains where supplemental magnesium shows measurable RCT evidence: sleep quality, anxiety and stress response, blood pressure regulation, insulin sensitivity, muscle cramp reduction, and migraine prophylaxis.1 The evidence quality varies by domain. Sleep and blood pressure have the strongest independent RCT bases. Anxiety has growing evidence but with more heterogeneity. Migraine prophylaxis has well-established clinical guideline support. See also: Full magnesium mechanism entry →
The glycinate chelate specifically matters for two reasons beyond bioavailability. First, glycine itself is an inhibitory neurotransmitter — it acts at glycine receptors in the brainstem and spinal cord, and potentiates GABA-A receptor activity in the brain. Sleep research on glycine supplementation (Bannai et al., 2012) showed measurable improvements in sleep onset latency and subjective sleep quality in adults with complaints of non-restorative sleep.2 When magnesium is delivered as the glycinate chelate, the glycine released during digestion contributes its own calming effect alongside the magnesium. This dual mechanism is specific to glycinate — citrate and oxide do not provide it.
Second, bisglycinate is absorbed via dipeptide transporters in the small intestine — a separate pathway from the divalent metal transporter (DMT-1) used by inorganic magnesium salts. This means glycinate absorption is less subject to competition from other minerals and less dependent on stomach acid pH. For older adults or anyone on proton pump inhibitors (PPIs), this absorption-pathway advantage is clinically meaningful — inorganic magnesium salts absorb poorly in low-acid environments, while glycinate does not have this limitation.3
Dosing — what 120mg per capsule means in practice
The 120mg per capsule dose is lower than some alternatives (Carbamide Forte delivers 375mg elemental per capsule). This is not a formulation weakness — it is a precision dosing feature. Most users can calibrate their elemental magnesium intake in 120mg increments: 120mg (pre-sleep trial dose), 240mg (standard maintenance), 360mg (therapeutic for sleep or cramps). The lower per-capsule dose also means gradual titration is easier, which matters for GI tolerance even though glycinate is the most GI-friendly form.
For sleep support: 240–360mg elemental 30–60 minutes before bed. The combined sedative mechanism of magnesium (NMDA receptor antagonism, GABA potentiation) and glycine (glycinergic inhibition) is best activated in proximity to sleep onset. For general deficiency correction: divided doses with meals reduce GI transit time and spread the absorption window. For muscle cramps or blood pressure: timing is less critical than consistency — same time daily for at least 4–8 weeks before assessing response.
Glycinate vs citrate vs oxide — the honest form comparison
Magnesium Glycinate (Bisglycinate)
Best for sleep + GI sensitivity- Highest bioavailability (~23.5%) via dipeptide transporters
- Glycine co-delivery: inhibitory neurotransmitter with independent sleep and calming evidence
- GI-neutral — does not cause laxative effects at standard doses
- Stable across pH — works in low-acid environments (PPI users, older adults)
- Preferred for daily long-term maintenance and sleep support
Magnesium Citrate
Best for general repletion + cost- Good bioavailability (~15%) via passive and active transport
- No glycine co-delivery — sleep advantage is magnesium-only
- Mild laxative effect — useful for constipation, problematic for sensitive users
- pH-dependent — absorbs less efficiently in low-acid environments
- Most cost-effective well-absorbed magnesium form on the Indian market
Most large magnesium RCTs (blood pressure, sleep, anxiety) used magnesium oxide, citrate, or mixed forms — not glycinate specifically. The glycinate evidence base for sleep is growing (including a 2024 magnesium bisglycinate RCT published in Sleep Medicine X), but it remains smaller than the broader magnesium literature. The glycine advantage is mechanistically strong but the direct head-to-head glycinate vs citrate sleep RCT data is still limited. Choosing glycinate over citrate is a well-reasoned extrapolation — it is not yet supported by a definitive superiority trial for any outcome. Evidence: Moderate (RCT, growing glycinate-specific base)
India comparison — ₹132–144 per day vs the domestic alternatives
| Brand | Form | Elemental / cap | Fillers? | Certification | ₹/day (2-cap) | NC score |
|---|---|---|---|---|---|---|
| Pure Encapsulations (this) | Bisglycinate chelate | 120mg | None | NSF · GMP · 3rd party | ₹132–144 | 8.7 |
| Carbamide Forte Mg Glycinate | Bisglycinate chelate | 375mg | Mg stearate, MCC | None public | ₹20–25 | 7.8 |
| HK Vitals Mg Glycinate | Bisglycinate | Varies | Multiple fillers | None | ₹8–12 | 7.2 |
| Pure Nutrition Mg Glycinate 350mg | Bisglycinate + Zinc | 350mg (Mg salt) | Possible excipients | FSSAI only | ₹15–18 | 7.5 |
Who should buy this — and the decision framework
- Need no-filler magnesium due to known sensitivities to Mg stearate, MCC, or other excipients
- Are in a clinical context where NSF certification or physician-grade sourcing is required
- Have GI sensitivity that makes citrate forms problematic and want the best-tolerated option
- Are on PPIs or antacids, where pH-independent absorption (bisglycinate dipeptide transport) matters
- Specifically want the glycine co-delivery for sleep — and are willing to pay for the exact form
- Want bisglycinate form at a fraction of the cost — Carbamide Forte at ₹20–25/day delivers the same chelate
- Are comfortable without NSF certification — most users are, and the RCT outcomes that matter are form-dependent, not brand-dependent
- Want a single-capsule high-dose solution — Carbamide Forte at 375mg elemental per capsule is more convenient for high-dose protocols
- Are on a budget and want to supplement magnesium for general deficiency correction without sleep-specific goals — magnesium citrate at ₹5–8/day works
Frequently asked questions
Full rubric breakdown
Magnesium as an element has a strong independent RCT base across sleep, blood pressure, anxiety, and migraine. Arab et al. 2023 (systematic review) confirmed sleep improvements. A 2016 meta-analysis of 20 RCTs confirmed modest but significant blood pressure reductions. The American Migraine Foundation endorses 400–500mg elemental magnesium for migraine prophylaxis. The bisglycinate chelate specifically has a growing RCT base (2024 bisglycinate sleep RCT, Sleep Medicine X). The glycine co-delivery mechanism adds evidence from the separate glycine sleep literature (Bannai 2012). 1-point deduction: the glycinate-specific vs general magnesium RCT base is still smaller than the broader evidence; most large magnesium trials used oxide or citrate forms, not bisglycinate. Evidence tier: Strong (meta-analysis) — magnesium · Moderate/growing — bisglycinate specifically1
Magnesium bisglycinate is the highest-bioavailability oral magnesium form for the sleep and anxiety use cases. Dipeptide transporter absorption is pH-independent and less subject to mineral competition than inorganic forms. Glycine co-delivery is a genuine mechanistic advantage. HPMC vegetarian capsule is the correct delivery vehicle — no gelatin, no allergy concerns. Ascorbyl palmitate as stabiliser is functional and appropriate. Zero unnecessary excipients. The 0.5 deduction is not a form criticism — it is for the 120mg per capsule dose, which requires 2–3 capsules to hit the therapeutic range, making the per-dose cost higher than a high-dose-per-capsule competitor at equivalent elemental magnesium.
NSF certified. Manufactured in a US GMP facility. Third-party tested for potency and purity. Free from wheat, gluten, dairy, soy, peanuts, tree nuts, eggs, GMOs, and artificial colours, flavours, and preservatives. Pure Encapsulations was founded in 1991 as a physician-grade supplement brand — the no-filler formulation philosophy predates the marketing of "clean" supplements by decades and is not a branding decision. Lot-traceable manufacturing. Ascorbyl palmitate as the only non-active excipient prevents oxidative degradation during shelf life — this is appropriate formulation chemistry. 0.5 deduction: no separate India-specific NABL or Trustified verification of the imported product as it reaches Indian consumers.
At ₹132–144/day for 240mg elemental magnesium (2 capsules), Pure Encapsulations is 5–7× more expensive than Carbamide Forte's bisglycinate option (₹20–25/day) and 10–18× more expensive than magnesium citrate options (₹8–12/day). The premium pays for: NSF certification, zero fillers, precise 120mg incremental dosing, physician-grade brand history, and ascorbyl palmitate as a functional stabiliser rather than Mg stearate. Whether these justify 5–7× the cost of a domestic bisglycinate is a genuine question with no single correct answer. For clinical contexts or known filler sensitivities, the premium is rational. For the majority of Indian supplement users whose primary need is correcting dietary magnesium deficiency and improving sleep, Carbamide Forte at ₹20–25/day delivers the same bisglycinate form at a fraction of the cost.
The supplement facts panel is the most transparent we have reviewed at Naked Compound. Three ingredients, all named precisely with form specified (magnesium as magnesium glycinate), capsule components identified (cellulose, water), stabiliser named (ascorbyl palmitate). No free-of claims that are not verifiable. No "proprietary blend" obfuscation. No undisclosed nitrogen-inflating amino additions. No marketing language in the supplement facts section. The "pure" in Pure Encapsulations is not marketing — the panel substantiates it completely. This product earns a 10 on label honesty because there is literally nothing to criticise: it says exactly what is in it, in exactly the correct degree of specificity. A 10/10 on this sub-score is rare in our review history — reserved for products where the label is its own verification.
Weighted score: (9.0 × 0.30) + (9.5 × 0.20) + (9.5 × 0.20) + (6.5 × 0.15) + (10.0 × 0.15)
= 2.700 + 1.900 + 1.900 + 0.975 + 1.500 = 8.975 → 8.7 (rounded to one decimal, value cap applied)
Per Naked Compound rubric v3.0 · dimension weights unchanged since Q1 2024
References
Disclosures: Naked Compound participates in the Amazon.in affiliate programme. Some links earn a small commission. No manufacturer provided samples or funding for this content. Pure Encapsulations / Nestlé Health Science did not receive advance notice of this review. Full policy: conflicts-policy