$42.99 $1.43 per serving
Product analysis
Stem Boost-R combines vitamin D, algae, botanical ingredients and carnosine. Missing preparation and blend details make the combination harder to compare.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality29
Vitamin D and some botanical sources are named, while several preparations are unspecified. Undisclosed source proportions and incomplete quality information limit a clear judgment of the formula.
Ingredient Transparency63
All ingredient amounts are disclosed, but several forms are missing. Source proportions are also undisclosed for the applicable mixtures, leaving their individual contributions unclear.
Value For Money31
The full serving cost is high for the green tea and carnosine contributions. Value for vitamin D and bladderwrack remains uncertain.
Customer Satisfaction66
Customer ratings are positive. The small review history gives a limited picture of satisfaction.
Product Focus39
The broad combination has no clearly established benefit for a particular goal in the available information. Its ingredient list alone does not show what each addition contributes.
- Format
Capsule - Container
- 120 Capsule(s)
- Per serving
- $1.43
- Customer rating
- 4.5 · 39 ratings
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Vitamin D3 (Cholecalciferol) | 50 mcg | |
Spirulina algae | 600 mg | |
Blueberry fruit extract | 500 mg | |
Royal Jelly | 333 mg | |
Brown Seaweed Extract (Undaria pinnatifida, Laminaria japonica) | 200 mg | |
Green Tea leaf extract (Caffeine, EGCG, Polyphenols) | 100 mg | |
L-Carnosine | 50 mg |
Carnosine · 50 mg OverallScore44
A serving provides 50 mg of L-carnosine, a relatively small amount for a carnosine-focused comparison. The equivalent cost is about $14.33 per 500 mg of carnosine, based on the whole-product price.
How this ingredient is rated
Active Ingredient Quality & Bioavailability94
The label identifies the ingredient as L-carnosine. The evaluation notes common additives.
L-Isomer and Dipeptide Specificity
The label identifies the ingredient as L-carnosine.
Purity and Clean Labeling
The evaluation notes common additives; it does not establish independently verified purity.
Dose, Safety & Label Transparency10
A serving supplies 50 mg of L-carnosine, a relatively small amount for a carnosine-focused comparison.
Dosage Efficacy for Anti-Glycation
A serving supplies 50 mg of L-carnosine, a relatively small amount for a carnosine-focused comparison.
Value10
The equivalent cost is about $14.33 per 500 mg of carnosine, based on the whole-product price, which is relatively high for carnosine.
Price per 500mg L-Carnosine
The equivalent cost is about $14.33 per 500 mg of carnosine, based on the whole-product price, which is relatively high for carnosine.
Blue-Green Algae · 600 mg OverallScore21
Each serving provides 600 mg of blue-green algae, with its form not identified in the saved facts. The whole-product serving costs about $1.43, and no qualifying algae testing claim is recorded.
How this ingredient is rated
Composition and Label Disclosure0
No qualifying organic, pesticide, non-GMO, or water-origin claim is recorded in the saved facts.
Algae Certification and Label Claims
No qualifying organic, pesticide, non-GMO, or water-origin claim is recorded in the saved facts.
Composition and Label Disclosure33
The saved facts give 600 mg of blue-green algae per serving, without an identified algae form. No qualifying testing claim is recorded.
Testing Claim Disclosure
No qualifying algae testing claim is recorded in the saved facts; that does not establish whether the algae was tested or is safe.
Algae Target Amount Disclosure
The saved facts give 600 mg of blue-green algae per serving, without an identified algae form.
Commercial Price and Usability40
A whole-product serving costs about $1.43; the price includes all ingredients and does not establish algae quality.
Commercial Price per Labeled Serving
A whole-product serving costs about $1.43; the price includes all ingredients and does not establish algae quality.
Green Tea (Caffeine, EGCG, Polyphenols) · 100 mg OverallScore61
A serving has 100 mg green tea leaf extract, with 47 mg EGCG recorded and a separate 50% EGCG concentration that gives a different amount. Using the recorded 47 mg, the whole-product price is about $6.10 per 200 mg EGCG.
How this ingredient is rated
Composition and Label Disclosure100
The 100 mg extract is recorded as 50% EGCG and 95% polyphenols; a separate 47 mg EGCG figure differs from the 50 mg implied by the percentage.
Declared Green Tea Marker Concentration
The extract has a 50% EGCG and 95% polyphenol disclosure; the recorded 47 mg EGCG differs from the 50 mg calculated from the percentage.
Composition and Label Disclosure40
A caffeine-related statement is recorded, but the whole-product caffeine amount is not established.
Whole-Product Caffeine Disclosure
Caffeine is mentioned; the available information does not establish the whole-product caffeine amount or a caffeine-free claim.
Commercial Price and Usability25
The whole-product price works out to about $6.10 per 200 mg EGCG using the recorded 47 mg per serving.
Cost per 200 mg Declared EGCG
The evaluated cost is about $6.10 per 200 mg EGCG, based on the whole-product price and recorded 47 mg EGCG per serving.
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