Liquid B12 2000µg with B-Complex 59ml vs B-Complex Plus
Side-by-side comparison of scores, ingredients, prices and real customer feedback for Liquid B12 2000µg with B-Complex 59ml and B-Complex Plus.
Last verified: 07 Apr 2026 · Based on 18 reviews
Liquid B12 2000µg with B-Complex 59ml scores 80.0/100 vs B-Complex Plus at 77.0/100. Liquid B12 2000µg with B-Complex 59ml wins on effectiveness, value for money. B-Complex Plus is stronger on ingredient quality and side effects.
Which is better: Liquid B12 2000µg with B-Co... or B-Complex Plus?
Solgar edges ahead with an 80/100 score versus Thorne's 77/100, and at £15.60 offers a clear price advantage given Thorne's unlisted premium cost. Thorne B-Complex Plus suits those with MTHFR variants or who need NSF Sport certification, thanks to its superior 91/100 ingredient quality using active methylated forms.
— AIScored Editorial Team
How Do the Scores Compare?
Liquid B12 2000µg with B-Co...
Solgar
|
B-Complex Plus
Thorne
|
|
|---|---|---|
| Overall Score | 80.0 | 77.0 |
| Effectiveness |
90.0/100
Best
|
74.0/100 |
| Ingredient Quality | 70.0/100 |
91.0/100
Best
|
| Value for Money |
80.0/100
Best
|
62.0/100 |
| Side Effects | 80.0/100 |
81.0/100
Best
|
| Certifications | 40.0/100 |
88.0/100
Best
|
| Best Price |
£15.60
Holland & Barrett →
Cheapest
|
View → |
| Form | liquid | N/A |
| Dose | None | N/A |
| Third-Party Tested | ✗ No | ✗ No |
| Reviews Analysed | 4 | 14 |
Liquid B12 2000µg with B-Complex 59ml
Pros
- ✓Consistently excellent user satisfaction (4/4 reviews at 5 stars) with reported improvement in energy and B12 levels
- ✓High bioavailability sublingual format may absorb better than tablets for B12 absorption
- ✓Generous 2000µg B12 dose plus complete B-complex for synergistic metabolic support
- ✓Suitable for vegans and vegetarians (particularly important given B12 is animal-derived)
Cons
- ✗No third-party testing or quality verification certification visible
- ✗Contains palm kernel oil (glycerin source) which may concern environmentally-conscious consumers
- ✗Cyanocobalamin form is synthetic; some prefer methylcobalamin as more bioavailable
- ✗Potassium sorbate preservative and artificial flavoring agents may deter some natural-focused buyers
Best For
B-Complex Plus
Pros
- ✓Uses active, methylated B-vitamin forms for superior absorption and bioavailability
- ✓NSF Certified for Sport — independently tested for purity and label accuracy
- ✓Particularly effective for people with MTHFR mutations who cannot convert synthetic folate/B12
- ✓Clean formulation — minimal excipients, no unnecessary fillers or artificial colours
Cons
- ✗Premium price point — significantly more expensive than standard B-complex supplements
- ✗High-dose niacin (as niacinamide) may cause GI discomfort in sensitive individuals
- ✗Available review data for this exact product is sparse and partially from an unrelated company
- ✗Bright yellow urine from riboflavin is normal but can alarm first-time users
Best For
What does the data say about Liquid B12 2000µg with... vs B-Complex Plus?
Solgar's Liquid B12 2000µg with B-Complex scores 80/100 overall against Thorne's B-Complex Plus at 77/100, but the gap between them tells a more interesting story than those numbers suggest. Solgar delivers 2000µg of B12 in a sublingual liquid, which the review data links to better absorption than tablet forms — useful for anyone with B12 deficiency or digestive absorption problems. Thorne, by contrast, uses methylated B-vitamin forms, including active folate rather than synthetic folic acid, which matters specifically for people with MTHFR gene variants who struggle to convert standard forms. On ingredient quality, Thorne pulls ahead clearly: 91/100 versus Solgar's 70/100.
Where Solgar wins decisively is effectiveness (90/100 versus 74/100) and value for money (80/100 versus 62/100). At £15.60 for 59ml, Solgar is a straightforward buy for vegans and vegetarians topping up B12, or for anyone who can't stomach capsules or tablets. The liquid format removes the pill-swallowing issue entirely. Thorne suits a narrower group: people who know they have MTHFR variants, or those who specifically want the reassurance of methylated forms and are willing to pay a premium for it.
One practical point worth knowing: Solgar's formula contains palm kernel oil as a glycerin source, which may put off environmentally-conscious shoppers. Thorne's high-dose niacinamide can cause GI discomfort in people with sensitive stomachs, so if that's you, start cautiously. For most people simply looking to correct a B12 shortfall, Solgar does the job efficiently and cheaply. Thorne earns its higher ingredient quality score, but only a specific subset of users will feel that difference.
Solgar's Liquid B12 2000µg with B-Complex is a sublingual supplement designed for those who struggle with tablets or capsules, with all reviewers giving 5-star ratings and reporting improved energy levels and B12 status.
What are the key differences?
Frequently Asked Questions
Which is better, Liquid B12 2000µg with B-Complex 59ml or B-Complex Plus? ▼
Is Liquid B12 2000µg with B-Complex 59ml worth the price compared to B-Complex Plus? ▼
Which has fewer side effects? ▼
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Disclaimer: AIScored provides data-driven comparisons based on publicly available reviews. This is not medical advice. Affiliate links may earn us a commission at no extra cost to you.
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