🟢 98/100

This product looks safe

  • Niacin: 50mg is 1.4× the Tolerable Upper Intake Level (35mg)
  • Folate: 680mg is 680.0× the Tolerable Upper Intake Level (1.0mg)
  • 54% of ingredients have research evidence
D Label Compliance Grade

Product Label

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Safety Alerts

⚠️ Niacin: 50mg is 1.4× the Tolerable Upper Intake Level (35mg)
⚠️ Folate: 680mg is 680.0× the Tolerable Upper Intake Level (1.0mg)

Label Data

336 Gram(s) Serving Size
8 Servings
Other Combinations Product Type
54% Evidence Coverage

Supplement Facts — Evidence Check

Calories
1250 Calorie(s)
Total Fat
3.5 Gram(s) (4% DV)
Cholesterol
105 mg (35% DV)
Total Carbohydrate
254 Gram(s) (92% DV)
Protein
50 Gram(s) (100% DV)
Vitamin A
940 mcg (104% DV)
Vitamin C
60 mg (67% DV)
5 mcg (25% DV)
✅ Within RDA (0.3× RDA of 0.015 mg) 📚 604 studies (Tier A: 16, B: 251)
RDA 0.015mg This product: 0.005mg UL 0.1mg
20 mg (133% DV)
✅ 1.3× RDA — within safe limits 📚 177 studies (Tier A: 3, B: 90)
RDA 15mg This product: 20mg UL 1000mg
4.8 mg (400% DV)
📊 4.0× RDA — above typical dose 📚 76 studies (Tier A: 0, B: 33)
RDA 1.2mg This product: 4.8mg
4 mg (308% DV)
📊 3.1× RDA — above typical dose 📚 12 studies (Tier A: 0, B: 1)
RDA 1.3mg This product: 4mg
50 mg (313% DV)
⚠️ Exceeds Tolerable Upper Intake Level by 1.4× (UL: 35 mg) 📚 193 studies (Tier A: 5, B: 63)
RDA 14mg This product: 50mg UL 35mg
5 mg (294% DV)
📊 3.8× RDA — above typical dose (UL: 100 mg) 📚 113 studies (Tier A: 3, B: 35)
RDA 1.3mg This product: 5mg UL 100mg
680 mcg DFE (170% DV)
⚠️ Exceeds Tolerable Upper Intake Level by 680.0× (UL: 1.0 mg) 📚 225 studies (Tier A: 10, B: 105)
RDA 0.4mg This product: 680mg UL 1.0mg
11 mcg (458% DV)
📊 4.6× RDA — above typical dose 📚 138 studies (Tier A: 1, B: 44)
RDA 0.0024mg This product: 0.011mg
300 mcg (1000% DV)
📊 10.0× RDA — above typical dose 📚 26 studies (Tier A: 0, B: 11)
RDA 0.03mg This product: 0.3mg
25.6 mg (511% DV)
📊 5.1× RDA — above typical dose 📚 1 studies — no high-quality reviews
RDA 5mg This product: 25.6mg
250 mg (45% DV)
✅ Within RDA (0.5× RDA of 550 mg) 📚 36 studies (Tier A: 1, B: 7)
RDA 550mg This product: 250mg UL 3500mg
Calcium
640 mg (49% DV)
Iron
6 mg (33% DV)
490 mg (39% DV)
✅ Within RDA (0.7× RDA of 700 mg) 📚 12 studies (Tier A: 0, B: 3)
RDA 700mg This product: 490mg UL 4000mg
53 mcg (35% DV)
✅ Within RDA (0.4× RDA of 0.15 mg) 📚 243 studies (Tier A: 4, B: 133)
RDA 0.15mg This product: 0.053mg UL 1.1mg
125 mg (30% DV)
📊 Market median: 4002.0mg (1 products) 📚 20 studies (Tier A: 0, B: 2)
This product: 125mg
15 mg (136% DV)
✅ 1.4× RDA — within safe limits 📚 258 studies (Tier A: 6, B: 134)
RDA 11mg This product: 15mg UL 40mg
71 mcg (129% DV)
✅ 1.3× RDA — within safe limits 📚 172 studies (Tier A: 0, B: 67)
RDA 0.055mg This product: 0.071mg UL 0.4mg
1 mg (111% DV)
✅ 1.1× RDA — within safe limits 📚 36 studies (Tier A: 0, B: 11)
RDA 0.9mg This product: 1mg UL 10mg
2 mg (87% DV)
✅ Within RDA (0.9× RDA of 2.3 mg) 📚 8 studies — no high-quality reviews
RDA 2.3mg This product: 2mg UL 11mg
120 mcg (343% DV)
📊 3.4× RDA — above typical dose 📚 197 studies (Tier A: 1, B: 55)
RDA 0.035mg This product: 0.12mg
80 mcg (178% DV)
✅ 1.8× RDA — within safe limits 📚 2 studies — no high-quality reviews
RDA 0.045mg This product: 0.08mg UL 2mg
Sodium
570 mg (25% DV)
Potassium
890 mg (19% DV)
📊 Market median: 5.0mg (298 products) 📚 701 studies (Tier A: 5, B: 123)
This product: 3mg
500 mg
📊 Market median: 420.0mg (227 products)
Median 420.0mg This product: 500mg
250 mg
📊 Market median: 550.0mg (217 products) 📚 29 studies (Tier A: 0, B: 5)
This product: 250mg
📊 Market median: 500.0mg (9 products)
This product: 5mg

Other Ingredients

Maltodextrin Protein Blend Natural and Artificial flavor Medium Chain Triglycerides Lecithin Malic Acid Acesulfame Potassium Sucralose Yellow 5

Label Claims — Verification

Nutrient
All Other
Structure/Function
All Other (100% of products) Structure/Function (92% of products) Nutrient (35% of products)

Target Groups

Adult (18 - 50 Years)

Product Information

📋 Directions for Use

336 grams About 2 heaping scoops Serious Mass Protein powder 24 fl oz Cold water, milk or other beverage 30-45 seconds Blend until dissolved Tips: New users may find it beneficial to begin with 1/2 of a serving daily for the first week and then gradually increase to 1 serving a day. Check out OptimumNutrition.com for recipes and training tips.

Suggested use: For healthy adults, consume enough protein to meet your daily protein requirements with a combination of high protein foods and protein supplements throughout the day as part of a balanced diet and exercise program.

⚠️ Warnings & Precautions

Contains: Egg, Milk, Soy.

🧪 Formulation Notes

Why Serious Mass? Each serving is packed with 1,250 calories to support a calorie surplus for weight and muscle building. 50 grams of protein to support muscle building and recovery. 254 grams of carbohydrates to support fueling of intense workouts and aid in replenishment of glycogen stores. 3 grams of creatine monohydrate to support performance. 25 vitamins and minerals plus glutamine.

Strength training Supports performance Supports weight gain goals

Informed Choice is a quality assurance program for sports nutrition products. The program certifies that nutritional supplements that bear the Informed Choice logo are regularly tested for banned substances by the world class sports anti-doping lab, LGC Limited.

Supports muscle building & weight gain goals When taken in addition to normal calorie intake and regular weight resistance training Helps boost calorie intake Helps build and maintain muscle Helps fuel intense workouts

1,250 calories 50g protein 254g carbs Banana naturally & artificially flavored

Serious Mass is designed to provide serious calories, protein and carbohydrates - making this a convenient way to get extra calories throughout your day.

Authentic Optimum Nutrition product OptimumNutrition.com/Authentic

Additional Information

Optimum Nutrition has been trusted to provide the highest quality in post-workout recovery, pre-workout energy, and on-the-go sports nutrition for over 30 years and in 90+ countries. After careful supplier selection, each ingredient is tested to assure exceptional purity, potency and composition. We hold ourselves to the highest production standards, all so you can unlock your body’s full potential. To find out more about the science and ingredients behind our products, visit OptimumNutrition.com.

Informed Choice We Test - You Trust

Manufactured in the USA This product contains ingredients of international and domestic origin

See supplement facts for sodium and cholesterol content

Store in a cool, dry place.

Serving scoop included, but may settle to the bottom during shipping Contents sold by weight not volume. Some settling will occur.

Product Details

UPC / SKU 7 48927 02886 7
DSLD Entry Date 2022-04-11
Product Type Other Combinations
Form Powder
DSLD ID 268268
Data Updated 2026-04-11

Research Evidence

7 Research Sources
26 Avg Quality Score
5 Other
2 Rct
C Para-aminobenzoic acid (PABA) used as a marker for completeness of 24 hour urine: effects of age and dosage scheduling
Rct European journal of clinical nutrition 2003
D [The diagnostic value of serum PABA determination in pancreatic disease and in relation to anticholinergic medication]
Rct Gastroenterologisches Journal : Organ der Gesellschaft fur Gastroenterologie der DDR 1989
D Para-aminobenzoic acid therapy in scleroderma and lymphoblastoma cutis
Other The Journal of laboratory and clinical medicine 1948
F The PABA story
Other The Australasian journal of dermatology 1999
F Sodium para-aminobenzoate PABA in the treatment of dermatoses
Other The Journal of investigative dermatology 1952
F Para-aminobenzoic acid therapy in lymphoblastoma cutis and mycosis fungoides
Other Cancer 1954
F Photochemical formation of singlet molecular oxygen (1O2) in illuminated aqueous solutions of p-aminobenzoic acid (PABA)
Other Journal of photochemistry and photobiology. B, Biology 1996
View all evidence for Paba →

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