THORNE - Iron Bisglycinate - 25 mg Iron Supplement for...
Good for: Buyers willing to read the details before deciding
Watch out for: pattern-extreme-polarization
Last analyzed: March 2026
Total Reviews
7,737
On Amazon
Verified
100%
Good
Amazon Rating
4.6
Original rating
Savinoo Rating
3.9
Adjusted rating
Our Recommendation
BE CAUTIOUS - Read individual reviews carefully, especially 1-star and 3-star reviews, before purchasing.
Analysis Summary
- MEDIUM RISK (Score: 70/100) THORNE - Iron Bisglycinate - 25 mg Iron Supplement for... has some concerning review patterns. Major Issues Found: 85% of reviews are either 5-star or 1-star, with only 15% in between.
- Real products usually have more balanced ratings. Positive Indicators: 100% of reviews are from verified purchases, which is good..
Customer Reviews from Amazon
Most Helpful Review
"The media could not be loaded. I recently purchased Thorne’s iron supplement and was shocked by what I received. The capsules look discolored and inconsistent, some are noticeably lighter while others are darker, giving the impression that they weren’t properly manufactured or stored. For a brand that promotes high-quality standards, this is completely unacceptable. I expected a professional, safe, and uniform product, not something that looks questionable right out of the bottle. I’ve lost trust in Thorne after this experience and won’t be buying again."
ali m cole
That 50 year old bloodwork said I needed to up my iron! The iron pills…
That 50 year old bloodwork said I needed to up my iron! The iron pills from Walmart did not agree with me at all! After research I found these that claimed to be gentle on the stomach. They are!! My levels are back within normal range and climbing and I have non of the side effects of iron pills!kelly
I’ve tried several other brands and they all upset my stomach, not this one. Great…
I’ve tried several other brands and they all upset my stomach, not this one. Great product.mo
I switched from Vitron C to this as other forms of iron bothered my stomach…
I switched from Vitron C to this as other forms of iron bothered my stomach and caused burping (ew). This one has not caused any of that so recommend it if you have low iron but haven't tolerated other supplements so far!aleasha casaretto
I’ve been taking Thorne Iron Bisglycinate 25 mg for a few weeks, and I’m very…
I’ve been taking Thorne Iron Bisglycinate 25 mg for a few weeks, and I’m very impressed. Unlike other iron supplements I’ve tried, this one is gentle on my stomach and doesn’t cause any discomfort. My iron levels are improving, and I feel more energetic overall. I appreciate the high-quality ingredients and the reputation of Thorne. Highly recommend for anyone needing a reliable iron supplement!emurray
When I first started taking this my ferritin was at an 8. After about 3…
When I first started taking this my ferritin was at an 8. After about 3 months of consistently taking the supplement every other night my ferritin is in the 30s. Be sure to take with a vitamin c source (I take it with a vitamin c gummy) and at least 2 hours after any type of food, tea/coffee, and other supplements to ensure it is absorbed effectively.pj
Very Good, time would tell
What Customers Talk About
Commonly Praised
Commonly Complained
Review Quality Analysis
Review quality helps identify authentic customer feedback. Longer, detailed reviews (50+ words) typically indicate genuine experiences, while high percentages of short reviews (under 20 words) may suggest incentivized or fake feedback.
Average Words
44
Moderate detail
Long Reviews
4%
⚠ Low detail
Short Reviews
16%
✓ Low brief reviews
Review Length Distribution
Authentic vs Brief Reviews
Average Word Count Gauge
Benchmark: 30 words = moderate, 50+ words = detailed & authentic
44
avg. words per review
Interpretation: Review quality appears within normal range for this product category.
Review Velocity
Review velocity tracks how quickly reviews are posted. Steady, gradual accumulation is natural, while sudden spikes or bursts (20+ reviews in a single day) may indicate incentivized campaigns or coordinated activity.
Average Per Day
0.07
Natural pace
Max in One Day
4
Normal range
Variable Velocity Pattern
Review posting rate varies over time. This may be linked to promotions, product launches, or seasonal events.
Rating Breakdown
This chart shows how customers rated THORNE - Iron Bisglycinate - 25 mg Iron Supplement for.... Products with authentic reviews typically show a bell curve with most ratings in the 3–4 star range. A heavily polarized distribution — many 5★ and 1★ with few middle ratings — can be worth investigating further.
Key Findings
85% of reviews are either 5-star or 1-star, with only 15% in between. Real products usually have more balanced ratings.
These findings suggest this is a trustworthy product.
Looks legit — check on AmazonWarning Flags
pattern-extreme-polarization
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Our analysis is based on 7,737 reviews.
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How does this compare?
This product scores 70/100 — above average among analyzed products.
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