Name: Optimum Nutrition, Serious Mass, Vanilla, Plastic Container
Brand: Optimum Nutrition
SKU: 22134

Contaminants

Lead
1x
limit
0.61 ug/serving

Heavy metal element with no biological function, toxic to multiple organ systems.

Arsenic
6 risks
8.43 ug/serving

A toxic metalloid element found in the environment often as a contaminant in water, soil, and food.

Ingredients & minerals

Acesulfame Potassium

Potential gastrointestinal discomfort at high doses, possible concerns over chronic toxicity though regulatory bodies consider it safe at typical use levels

Sucralose

Potential gut microbiota alterations, rare hypersensitivity reactions, possible glucose metabolism effects in some studies

Natural and Artificial Flavors

Lack of transparency, potential presence of solvents or processing aids, sensitization risk, ultra-processed ingredient

Folic acid

Excessive intake may mask vitamin B12 deficiency, potential concern for unmetabolized folic acid accumulation

PABA (para-aminobenzoic acid)

Potential allergic reactions, liver toxicity at high doses, skin irritation, possible drug interactions

Pyridoxine Hydrochloride

Prevents vitamin B6 deficiency, supports metabolism, nervous system function

Cyanocobalamin

Prevents vitamin B12 deficiency, supports red blood cell formation, neurological function, and DNA synthesis

Maltodextrin

Provides quick energy source, improves texture and mouthfeel in processed foods

Albumen (Egg white) powder

High-quality protein source, contains essential amino acids, low in fat and carbohydrates

Di-Potassium Phosphate

Acid-base balance support, potassium source, phosphorus source

Biotin

Supports metabolic processes, coenzyme in carboxylation reactions

Inositol

Supports cell signaling pathways, considered safe as a dietary component

Copper gluconate

Supports red blood cell formation, involved in energy production, aids immune function, supports antioxidant activity

Chromium polynicotinate

May improve glucose metabolism, possible support for insulin sensitivity, may aid glucose homeostasis in deficient individuals

Molybdenum Amino Acid Chelate

Essential trace mineral, supports enzymatic detoxification, necessary for metabolism of sulfur-containing amino acids

Whey Protein Concentrate

High-quality protein source, supports muscle growth and repair, contains essential amino acids

Niacinamide

Supports skin barrier integrity, improves skin appearance, essential nutrient

Ascorbic Acid

Antioxidant protection, supports collagen synthesis, preservative against oxidation

L-Glutamine

Supports protein synthesis, gut mucosa integrity, and immune cell function

Choline bitartrate

Supports cognitive function, liver health, and cell membrane structure

Calcium citrate

Source of bioavailable calcium, supports bone health and normal physiological functions

Calcium Caseinate

High-quality protein source, provides essential amino acids, supports muscle repair and growth

Manganese amino acid chelate

Improved absorption compared to inorganic forms, supports bone formation, antioxidant activity, cofactor for metabolic enzymes

Zinc Citrate

Essential trace minerals, support enzymatic reactions, antioxidant functions

Riboflavin

Essential nutrient, supports energy metabolism

Lecithin

Emulsification properties aiding in product stability and texture, source of phosphatidylcholine which is a component of cell membranes

Selenium (as L-Selenomethionine)

Essential dietary selenium source, supports antioxidant enzymes and thyroid function

Organic Medium Chain Triglycerides (MCTs)

Rapid energy source, easier digestion compared to long-chain triglycerides

Cholecalciferol

Supports bone health, calcium absorption, and immune function

Ferrous Fumarate

Provides bioavailable iron to support hemoglobin synthesis and prevent iron deficiency

Glutamine Peptides

Enhanced muscle recovery, improved intestinal health, support for immune function

Magnesium Aspartate

Magnesium source supporting enzymatic functions, muscle function, and nervous system health

Sweet Dairy Whey

Rich source of whey proteins and bioavailable nutrients

Potassium iodide

Prevents iodine deficiency, supports thyroid hormone synthesis

D-Calcium Pantothenate

Supports energy metabolism, involved in synthesis of coenzyme A, important for skin and hair health

Di-calcium Phosphate

Supports enamel remineralization, mild abrasive effect for cleaning teeth

Product details

Packaging

Polyethylene

Sources

Consumer Reports Protein Powders Lead Test Results October 2025