RTD 51 Peanut Butter Cup is a amino acid/protein supplement by MET-Rx Protein Plus in liquid form, listing 49 ingredients in the NIH Dietary Supplement Label Database (DSLD), maintained by the Office of Dietary Supplements at the National Institutes of Health. Currently listed as off-market (no longer available for purchase, but label data is preserved). Daily Value percentages shown below are based on FDA reference daily intake amounts for adults.
Ingredients listed on each label, against the amino acid/protein category average of 12.7. Data from the NIH DSLD.
RTD 51 Peanut Butter Cup49
1 Up Whey Chocolate & Peanut Butter Blast20
Amino acid/Protein average12.7
RTD 51 Peanut Butter Cup lists 29 ingredients more than 1 Up Whey Chocolate & Peanut Butter Blast. That is 36 above the amino acid/protein average.
What the Label Data Shows
According to NIH DSLD label rows, RTD 51 Peanut Butter Cup sits in the top 2% of products with a countable formula by declared ingredient count.
With 49 ingredients on the label, RTD 51 Peanut Butter Cup is one of the more extensive amino acid/protein supplement formulas from MET-Rx Protein Plus in the NIH Dietary Supplement Label Database (DSLD), sold in liquid form. These ingredients span 11 nutrient categories, mineral, vitamin, other, fat, and 7 more, reflecting a multi-component formula rather than a single-nutrient product.
Across a broader 49-ingredient formula, 49 of 49 lack a percentage Daily Value in the available source record, leaving their regulatory reference status unspecified on this page.
Market status matters for supplement research. This product is currently listed as off-market in the DSLD, with its label first entered into the database on 2014-06-25. An off-market listing means production and distribution under this label have stopped, but the DSLD does not delete the entry, it stays on file for historical reference and formulation-history tracking.
About the DSLD database
The DSLD is a label database, not an FDA approval list, under the 1994 DSHEA framework, dietary supplements do not require pre-market approval, and label information reflects what manufacturers self-declare rather than independent laboratory verification. This page presents factual label data for reference only and is not medical advice; consult a licensed healthcare provider before making decisions about any supplement.
Source: NIH Office of Dietary Supplements, Dietary Supplement Label Database (DSLD) Supplement label data for RTD 51 Peanut Butter Cup: ingredients, % Daily Value, market status, brand · 2026 DSLD captures manufacturer-self-declared label information; the NIH does not verify accuracy or evaluate safety/efficacy. Dietary supplements are regulated under DSHEA 1994, no pre-market FDA approval is required.
Nationwide supplements with similar label profiles
Two DSLD-derived peer sets for RTD 51 Peanut Butter Cup, both outside the MET-Rx Protein Plus brand so the neighborhoods are not catalog containment (the same-type Nearby block above stays type-local).
Similar ingredient count
Nearest cross-brand formulas by declared ingredient count (49 here).
Metamyosyn(R) VPR Protein Blend, Vitamin and Mineral Blend
non-nutrient/non-botanical
2
Acesulfame Potassium, Sucralose
protein
1
Protein
botanical
1
Cocoa
complex carbohydrate
1
Carrageenan
Daily Value Coverage
0
Above 100% DV
0
Below 100% DV
49
%DV not reported in source
Frequently Asked Questions
What ingredients are in RTD 51 Peanut Butter Cup? ▼
RTD 51 Peanut Butter Cup contains 49 ingredients. By declared ingredient count it sits in the top 2% of DSLD products PlainVitamins places. Ingredients span 11 categories: mineral, vitamin, other, fat, sugar, fiber, blend, non-nutrient/non-botanical, protein, botanical, complex carbohydrate.
Who manufactures RTD 51 Peanut Butter Cup? ▼
RTD 51 Peanut Butter Cup is was manufactured by MET-Rx Protein Plus. It is classified as a Amino acid/Protein supplement in liquid form.
Is RTD 51 Peanut Butter Cup still available for purchase? ▼
According to the NIH DSLD database, RTD 51 Peanut Butter Cup is listed as off-market and may no longer be available for purchase.
What is the serving size of RTD 51 Peanut Butter Cup? ▼
The serving size is not specified.
What type of supplement is RTD 51 Peanut Butter Cup? ▼
RTD 51 Peanut Butter Cup is classified as a "Amino acid/Protein" supplement in the NIH database. This category includes products primarily composed of amino acid/protein ingredients. The NIH DSLD tracks 9 supplement categories: Vitamin, Mineral, Botanical, Amino Acid & Protein, Non-Nutrient, Fat & Fatty Acid, Multi-Vitamin & Mineral, Botanical with Nutrients, and Other Combinations.
Data Sources & Methodology
Data as of 2025. Source: NIH Office of Dietary Supplements, Dietary Supplement Label Database (DSLD).
Supplement label data sourced from the Source: NIH Dietary Supplement Label Database (DSLD),
maintained by the Office of Dietary Supplements at the National Institutes of Health.
The DSLD contains label information from dietary supplement products marketed in the United States.
Daily Value (DV) percentages are based on Source: FDA 21 CFR 101.9 Reference Daily Intake (RDI) values for adults. Products marked "Off Market"
may no longer be available for purchase but their label data remains in the database for reference.
Disclaimer, Not Medical Advice
Label data from the Source: NIH Dietary Supplement Label Database (DSLD). This information is for educational and reference purposes only and does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before starting, stopping, or combining any dietary supplement, especially if you are pregnant, nursing, take prescription medication, or have a medical condition.