TLDR Review: Optimum Nutrition Serious Mass Vanilla 6 lb
Verdict
Optimum Nutrition Serious Mass is a proven option for those looking to gain weight effectively, especially when used alongside regular exercise and a well-balanced diet. It offers a range of flavors, with chocolate and Cookie Cream being particularly favored. However, be cautious of its caffeine content and overall cost, which has increased. If you're sensitive to caffeine or looking for better cost-effectiveness and macros, consider switching to a whey protein alternative.
- Top pro:
- Consistent quality from a trusted brand, providing a high level of satisfaction.
- Top con:
- Price has doubled from previously considered good value, diminishing affordability.
Pros
- •Consistent quality from a trusted brand, providing a high level of satisfaction.
- •Easy to mix, even in cold water, with no clumps when using an electric blender.
- •Highly effective for weight gain when combined with regular exercise and a good diet, with some users gaining 15-30 lbs over time.
- •Vanilla flavor is decent, but chocolate and Cookie Cream flavors are particularly recommended for taste.
- •Versatile mixing options; can add ingredients like peanut butter and olive oil for increased calories and protein.
- •Helps suppress appetite effectively, making it a suitable meal replacement.
- •Many recommendations for repeat purchases due to satisfaction with performance.
Cons
- •Price has doubled from previously considered good value, diminishing affordability.
- •Misleading serving size; large scoop equates to approximately 625 calories, but challenging to use.
- •Contains caffeine, which is not disclosed on the label and has caused severe health issues for some users, including ER visits.
- •Strawberry flavor is poorly received, with a chemically and unpleasant taste.
- •The protein powder includes high amounts of carbs from Maltodextrin, which may not be preferred by users mindful of sugar intake.
- •Concerns over gaining fat in addition to muscle if not paired with sufficient exercise.
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How we researched this
About this review: it summarizes the professional reviews and customer ratings ShopSavvy collected for this product, alongside prices from 1 retailer in ShopSavvy's price data, most recently seen Jul 6, 2026.
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