Vitamin D3 4000IU - 1+ Year Supply - 400 Tablets - Easy to Swallow 6mm Micro Vitamin D Tablets - Gentle Cholecalciferol Form - Vegetarian-Friendly VIT D Supplement - 1 per Day - Made in The UK

Vitamin D3 4000IU - 1+ Year Supply - 400 Tablets - Easy to Swallow 6mm Micro Vitamin D Tablets - Gentle Cholecalciferol Form - Vegetarian-Friendly VIT D Supplement - 1 per Day - Made in The UK

ASIN: B086V74KKR
Analysis Date: Jan 20, 2026 (re-analyzed Jan 20, 2026)

Review Analysis Results

B
Authenticity Grade
15.00%
Fake Reviews
4.80
Original Rating
4.40
Adjusted Rating

Analysis Summary

The vast majority of these reviews appear genuine, with approximately 85% showing authentic characteristics. Most reviews are from verified purchasers, and the content reflects typical user experiences with a vitamin D supplement. The product has overwhelmingly positive feedback, which is normal for a well-received health supplement that meets consumer expectations for quality, convenience, and value.

Strong evidence of authenticity includes detailed personal experiences like review #1 discussing specific benefits on tiredness levels and ease of swallowing without water, review #3 providing specific dosage information (4000 IU) and noting the one-year supply, and review #7 offering a balanced 3-star perspective acknowledging no perceived benefits despite long-term use. Review #5 shows genuine product selection reasoning by mentioning avoidance of sunflower oil, while review #13 provides detailed German-language feedback about seasonal use and energy benefits. These reviews contain personal context, specific product knowledge, and varied perspectives that indicate authentic user experiences.

A few reviews raise minor concerns due to their extremely brief, generic nature. Review #8 ('Great price'), review #12 ('Thank you'), and review #14 ('Buy as gift they said it helps them and asked for more.') lack specific details about the product experience. However, these represent only a small fraction of the total reviews, and even brief positive comments can be genuine from satisfied customers who don't elaborate extensively.

Overall, this review set appears predominantly authentic with a normal distribution of detailed and brief feedback. The few potentially suspicious reviews are outweighed by numerous detailed, personalized accounts that demonstrate real user experiences. The product seems to genuinely satisfy most customers with its small tablet size, convenience, and perceived health benefits.

Key patterns identified in the review analysis include: Mention of small/easy-to-swallow tablets, References to long-lasting supply (400 tablets/year), Specific dosage mentions (4000 IU).

Review Statistics

About Review Data Collection

We extract as much review data as Amazon makes available at the time of analysis. The amount may vary due to Amazon's rate limiting, regional restrictions, or other factors. Our analysis is based on the reviews we successfully collected.

22,732
Total Reviews on Amazon
15
Reviews Analyzed
13
Genuine Reviews
2
Fake Reviews
-0.40
Rating Difference

Want to analyze more reviews? Install the Null Fake Chrome extension to capture and analyze additional reviews as you browse Amazon.

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Price Analysis

This appears to be a well-regarded, UK-made vitamin D supplement positioned in the mid-range market. Given the exceptional 4.8/5 rating from over 22,000 reviews, focus on value rather than absolute lowest price. Look for Amazon discounts or subscribe & save to get this quality product at the best price.

MSRP Assessment

Estimated MSRP: £18-£25
Source: Market research
Amazon Price: Unable to compare

Market Position

Positioning: Mid-range
Alternatives Range: £8-£35
Value: Excellent value for a UK-made, high-potency, vegetarian-friendly vitamin D supplement with exceptional customer ratings.

Buying Tips

Best Time to Buy: Best purchased in autumn/winter when demand is higher, but watch for Amazon Prime Day or Black Friday deals.
Deal Indicators: Price below £12 for the 400-tablet supply, subscribe & save discounts, or bundled offers with other vitamins.
Watch For: Be wary of prices significantly below £8, which may indicate counterfeit or expired products given the high manufacturing standards claimed.
Price analysis generated by AI based on product category and market research. Actual prices may vary. Last analyzed: Jan 20, 2026

Understanding This Analysis

What does Grade B mean?

This product has good review authenticity with minor concerns. While most reviews appear genuine, we detected some patterns that warrant mild caution.

Adjusted Rating Explained

The adjusted rating (4.40 stars) represents what we estimate this product's rating would be if fake reviews were removed. This product's adjusted rating is lower than Amazon's displayed rating (4.80 stars), suggesting positive fake reviews may be inflating the score.

How We Detect Fake Reviews

Our AI analyzes multiple factors: language patterns (generic vs. specific), reviewer behavior (history, timing), temporal anomalies (review clusters), verification status, sentiment authenticity, and statistical outliers. No single factor determines a review is fake - we look at the combination of signals.

Important Limitations

No automated system is perfect. Sophisticated fake reviews can evade detection, and some genuine reviews may be incorrectly flagged. Use this analysis as one data point in your purchasing decision, not the only factor. Reading actual review content yourself is always valuable.

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