Prices verified May 28 · Always confirm at the retailer before buying.
Nature's Bounty wins for most buyers at $7.47 for 500 mg tablets, while Doctor's Best offers superior absorption for sleep and stress support at $12.99.
The Verdict
Winner
Nature's Bounty Magnesium 500 mg
Nature's Bounty Magnesium 500 mg Tablets vs Doctor's Best High Absorption Magnesium Glycinate Lysinate, side by side
Pros:
- Lowest price per mg at $7.47 per bottle
- 500 mg high potency per tablet
- Over 100,000 Amazon reviews with 4.7 stars
Cons (honest weight):
- Oxide form has low absorption (about 4%)
- May cause digestive upset in sensitive individuals
Pros:
- Up to 6x better absorption than oxide forms
- Gentle on the digestive tract
- Supports restful sleep and muscle relaxation
Cons (honest weight):
- Higher price per mg than basic oxide
- Only 200 mg elemental magnesium per pill
Where each one wins
8 dimensions scored head-to-head. Nature's Bounty takes 5; Doctor's Best takes 2.
| Dimension | Nature's Bounty Magnesium 500 mg Tablets | Doctor's Best High Absorption Magnesium Glycinate Lysinate | Winner |
|---|---|---|---|
| Price per bottleNature's Bounty costs 43% less. | $7.47 | $12.99 | Nature's Bounty |
| Form (magnesium type)Glycinate is more bioavailable. | Magnesium Oxide | Magnesium Glycinate Lysinate | Doctor's Best |
| Absorption rateDoctor's Best offers superior absorption. | Low (4% typical) | High (up to 6x better) | Doctor's Best |
| Dosage per pillNature's Bounty delivers 2.5x more magnesium per pill. | 500 mg | 200 mg | Nature's Bounty |
| RatingBoth excellent, but Nature's Bounty has a slight edge. | 4.7 stars | 4.6 stars | Nature's Bounty |
| Best forEach excels in different use cases. | Budget value | Absorption & sleep | Tie |
| Review countMore verified buyers back Nature's Bounty. | 103,854 | 75,422 | Nature's Bounty |
| Cost per mgNature's Bounty is 77% cheaper per mg. | $0.00015 per mg | $0.00065 per mg | Nature's Bounty |
| Overall | 5 wins | 2 wins | Nature's Bounty |
Price per Bottle — Nature's Bounty Wins
Nature's Bounty costs $7.47, while Doctor's Best costs $12.99. That's a 43% discount for the oxide option.
For budget shoppers, the savings add up fast. A single bottle of Nature's Bounty lasts 120 days at one tablet daily — $0.06 per day.
Prioritize this dimension if you're on a strict supplement budget. Every dollar saved on magnesium can go toward other nutrients.
Form (Magnesium Type) — Doctor's Best Wins
Doctor's Best uses magnesium glycinate lysinate, a chelated form. Nature's Bounty uses magnesium oxide, the cheapest and least absorbable type.
Glycinate is bound to the amino acid glycine. This improves absorption and reduces digestive side effects compared to oxide.
Choose Doctor's Best if you want a form your body can actually use. Studies show glycinate absorbs up to 6x better than oxide.
Absorption Rate — Doctor's Best Wins
Magnesium oxide has around 4% bioavailability; glycinate can reach 24%. That's why Doctor's Best claims 6x better absorption.
Higher absorption means more magnesium reaches your cells. You get more benefit from each milligram you take.
This matters most if you have absorption issues or a sensitive digestive tract. Doctor's Best is the clear winner here.
Dosage Per Pill — Nature's Bounty Wins
Nature's Bounty packs 500 mg per tablet; Doctor's Best has 200 mg. You need 2.5 tablets of Doctor's Best to match one tablet of Nature's Bounty.
Fewer pills means easier compliance. Swallowing one tablet vs. two or three daily.
Pick Nature's Bounty if you hate taking multiple pills. One tablet gives you a full 119% of the daily value.
Rating — Nature's Bounty Wins (Slight Edge)
Nature's Bounty averages 4.7 stars from 103,854 reviews; Doctor's Best 4.6 from 75,422. Both are highly rated.
The 0.1-star difference is statistically small but consistent. Nature's Bounty has a broader base of satisfied customers.
Consider this if you rely heavily on user consensus. Either product is well-trusted.
Best For — Tie
Each product serves a distinct buyer. Nature's Bounty is for value; Doctor's Best is for absorption and sleep.
CNET named Nature's Bounty the best budget magnesium supplement. Video reviewers consistently recommend glycinate for sleep.
Let your primary goal decide. Save money? Choose Nature's Bounty. Optimize for sleep? Choose Doctor's Best.
Review Count — Nature's Bounty Wins
Nature's Bounty has 103,854 reviews; Doctor's Best has 75,422. That's 38% more user feedback.
More reviews indicate a longer track record and broader testing. The larger sample size adds confidence.
Trust Nature's Bounty if you want a supplement with a proven history.
Cost per mg — Nature's Bounty Wins
Nature's Bounty costs $0.00015 per mg; Doctor's Best costs $0.00065 per mg. Nature's Bounty is 77% cheaper per milligram of elemental magnesium.
For high-dose users, this makes a huge difference. A month's supply at 500 mg costs $1.12 vs. $4.87.
If you need a high dose on a budget, Nature's Bounty is unmatched.
Which should you buy?
| Your situation | Pick | Why |
|---|---|---|
| Budget shopper | Nature's Bounty Magnesium 500 mg Tablets | Lowest cost per mg on Amazon |
| Sleep seeker | Doctor's Best High Absorption Magnesium Glycinate Lysinate | Glycinate form promotes relaxation and restful sleep |
| High-dose need | Nature's Bounty Magnesium 500 mg Tablets | 500 mg per tablet for fewer pills |
| Sensitive stomach | Doctor's Best High Absorption Magnesium Glycinate Lysinate | Chelated glycinate is gentle on digestion |
| Student or minimalist | Nature's Bounty Magnesium 500 mg Tablets | One bottle lasts months at a low price |
| Fitness enthusiast | Doctor's Best High Absorption Magnesium Glycinate Lysinate | Supports muscle recovery and stress reduction |
Lowest cost per mg on Amazon
Glycinate form promotes relaxation and restful sleep
500 mg per tablet for fewer pills
Chelated glycinate is gentle on digestion
One bottle lasts months at a low price
Supports muscle recovery and stress reduction
What if neither is right?
Pure Encapsulations Magnesium (Glycinate)
$27
Premium glycinate for those who want a trusted, hypoallergenic brand
Nature Made Magnesium Oxide 400 mg
$12.49
Trusted USP-certified brand at a mid-range price
BioEmblem Triple Magnesium Complex
$27.99
Blend of three forms for balanced absorption
Frequently Asked Questions
Nature's Bounty vs Doctor's Best: which is better?
It depends on your goals. Nature's Bounty is better for budget and high dosage per pill, while Doctor's Best is superior for absorption and sleep support. Choose Nature's Bounty if you want maximum value per dollar; pick Doctor's Best if you want maximum bioavailability.
Is Doctor's Best Magnesium Glycinate worth the extra money?
Yes, if you prioritize absorption and have a sensitive stomach. The glycinate form is up to 6x more absorbable than oxide and gentle on digestion. For sleep and muscle relaxation, many users find the premium worth the $5.52 price gap.
What form of magnesium is best?
For general supplementation, glycinate (or bisglycinate) is considered the gold standard due to high absorption and digestive comfort. Oxide is best for those on a strict budget who don't have stomach issues. Citrate is good for constipation but can cause loose stools.
How much magnesium should I take daily?
The recommended daily allowance (RDA) for adults is 310-420 mg, though many people need less from supplements due to dietary intake. The safe upper limit from supplements is 350 mg per day. Start low and increase gradually.
Can magnesium supplements cause side effects?
Yes, especially magnesium oxide can cause diarrhea, cramping, or nausea. Glycinate forms are much gentler. Staying under 350 mg of supplemental magnesium daily minimizes side effects. If you experience discomfort, split your dose or switch to a chelated form.
How we compared. We analyzed 179,000+ verified Amazon reviews, consulted expert verdicts from CNET and video reviews, and evaluated manufacturer specs. Prices updated weekly from Amazon.
Who wrote this and where's the data from?
Mubboo Editorial Team — independent US-market consumer research. Picks reflect editorial consensus from expert sources and 179,000+ verified buyer reviews.