NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) vs NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets
NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) (#3) vs NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets (#5): in our Magnesium Glycinate for Sleep scoring the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) totals 7.9/10 and the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets…
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NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g)
$14.69Check price at iHerbRead full review
NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets
$19.59Check price at iHerbRead full reviewTopsFive comparison scores
Side by side
| NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) | NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets | |
|---|---|---|
| Price | $14.69 | $19.59 |
| Magnesium Form | Albion magnesium bisglycinate | Albion magnesium bisglycinate |
| Elemental Magnesium | 300 mg per serving | 200 mg per serving; 100 mg per tablet |
| Serving Size | 1 level teaspoon (approximately 3 g) | 2 tablets |
| Servings Per Container | About 76 | 90 |
| Added Sleep Ingredients | None; no melatonin or L-theanine | None; no melatonin or L-theanine |
| Third-Party Verification | No qualifying finished-product certification shown; Non-GMO Project Verified | No qualifying finished-product certification shown; manufacturer states in-house quality testing |
| Other Ingredients | Citric acid | Citric acid, hydroxypropyl cellulose, stearic acid, silicon dioxide and vegetarian coating with hypromellose, sunflower lecithin, triethyl citrate and sunflower oil |
| Allergen/Diet Notes | Vegetarian/vegan and kosher; not manufactured with yeast, wheat, gluten, soy, milk, egg, fish, shellfish, tree nuts or sesame | Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nuts or sesame; facility processes other allergen-containing ingredients |
How they differ in real use
Built from our magnesium glycinate for sleep scoring, each product's published specifications, and verified owner feedback — not hands-on testing.
Both the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) and the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets made our Top 5 Magnesium Glycinate for Sleep, at #3 and #5. The form, research-aligned dose, minimal ingredient list and exceptional value are stronger than the remaining uncertified products. Its low Third-Party Testing score keeps it below the independently verified top two despite leading the lighter-weight criteria. It matches Doctor's Best on elemental dose and has similarly strong recent sales, but costs more per active amount and uses a longer excipient list. With no stronger third-party verification to offset those disadvantages, it ranks fifth.
We score magnesium glycinate for sleep on Third-Party Testing (30%), Form & Bioavailability (25%), Dose vs Research (20%), Label Transparency (15%) and Value (10%). On that basis the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) totals 7.9 out of 10 and the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets 7.1. The widest gap is Dose vs Research, where the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) scores 10 against 8 for the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets — per-serving dose versus doses used in published human trials. Label Transparency also separates them: 10 for the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) versus 8 for the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets.
On paper, the specifications that actually differ: Elemental Magnesium — 300 mg per serving on the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) versus 200 mg per serving; 100 mg per tablet on the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets; Serving Size — 1 level teaspoon (approximately 3 g) on the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) versus 2 tablets on the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets; Servings Per Container — About 76 on the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) versus 90 on the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets; Third-Party Verification — No qualifying finished-product certification shown; Non-GMO Project Verified on the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) versus No qualifying finished-product certification shown; manufacturer states in-house quality testing on the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets; Other Ingredients — Citric acid on the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) versus Citric acid, hydroxypropyl cellulose, stearic acid, silicon dioxide and vegetarian coating with hypromellose, sunflower lecithin, triethyl citrate and sunflower oil on the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets; Allergen/Diet Notes — Vegetarian/vegan and kosher; not manufactured with yeast, wheat, gluten, soy, milk, egg, fish, shellfish, tree nuts or sesame on the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) versus Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nuts or sesame; facility processes other allergen-containing ingredients on the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets. They match on Magnesium Form and Added Sleep Ingredients.
Pricing as of August 5, 2026: $14.69 for the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) and $19.59 for the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets, a $4.9 difference in the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g)'s favor. Owners praise the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) for the 300 mg elemental dose is close to the 250 mg magnesium-bisglycinate dose used in the cited sleep trial. and at about $0.06 per 100 mg of elemental magnesium, it has the list's lowest active-ingredient cost.; the most common complaint is no USP, NSF, Informed Sport or published product-specific certificate is shown for the finished product. Owners praise the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets for the panel explicitly identifies 200 mg elemental magnesium from 2,000 mg Albion magnesium bisglycinate. and the bottle supplies 90 servings at approximately $0.22 per serving.; the most common complaint is no USP, NSF, Informed Sport or published product-specific certificate is shown for the finished product.
NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g)
- The 300 mg elemental dose is close to the 250 mg magnesium-bisglycinate dose used in the cited sleep trial.
- At about $0.06 per 100 mg of elemental magnesium, it has the list's lowest active-ingredient cost.
- The panel lists only magnesium bisglycinate and citric acid, without a proprietary blend.
- No USP, NSF, Informed Sport or published product-specific certificate is shown for the finished product.
- The label requires one teaspoon to be diluted in at least 6 oz of water or juice, making it less convenient than tablets or capsules.
NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets
- The panel explicitly identifies 200 mg elemental magnesium from 2,000 mg Albion magnesium bisglycinate.
- The bottle supplies 90 servings at approximately $0.22 per serving.
- More than 40,000 reviews and 90,000-plus recent sales provide substantial buyer-volume evidence.
- No USP, NSF, Informed Sport or published product-specific certificate is shown for the finished product.
- A serving requires two tablets and includes citric acid, cellulose derivatives, stearic acid, silicon dioxide and a multi-ingredient coating.
Which should you buy?
The NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) is the better fit for buyers prioritizing elemental-magnesium value and people comfortable mixing an unsweetened powder — it is the higher-scoring pick here, chiefly for Dose vs Research and Label Transparency. The NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets is the better fit for buyers wanting a widely purchased pure-bisglycinate tablet and people who want magnesium without melatonin or L-theanine. Since the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) is both the higher scorer and $4.9 cheaper, the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets only makes sense for buyers wanting a widely purchased pure-bisglycinate tablet. The NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) is a poor fit for people wanting capsules or tablets; the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets is a poor fit for buyers requiring product-specific external certification.
Choose the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) if
- Buyers prioritizing elemental-magnesium value
- People comfortable mixing an unsweetened powder
Skip it if
- People wanting capsules or tablets
- Buyers requiring external finished-product certification
Choose the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets if
- Buyers wanting a widely purchased pure-bisglycinate tablet
- People who want magnesium without melatonin or L-theanine
Skip it if
- Buyers requiring product-specific external certification
- People preferring a one-capsule or one-tablet serving
Common questions
Is the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) better than the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets?
In our Magnesium Glycinate for Sleep ranking the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) scores higher overall, 7.9 to 7.1, with the biggest advantage in Dose vs Research. The NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets does not out-score it on any criterion we weigh.
How much more does the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets cost than the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g)?
$4.9 more as of August 5, 2026: $19.59 for the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets against $14.69 for the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g). Prices move, so the merchant page shows the current figure.
What is the main difference between the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) and the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets?
The headline spec difference is Elemental Magnesium: 300 mg per serving on the NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g) versus 200 mg per serving; 100 mg per tablet on the NOW Foods, Magnesium Glycinate, 100 mg, 180 Tablets. In use, the gap that matters most is Dose vs Research (10 vs 8 in our scoring): per-serving dose versus doses used in published human trials.