Updated · Researched and written by Elan Harpaz · How we pick
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For most people the best protein powder is the Optimum Nutrition Gold Standard Pro Gainer, $144.99 when we checked it on 2026-10-12. Hard gainers trying to put on size
Researched, not tested: we have not handled these products. Verdicts come from published specs, owner reviews read at volume, and our own weekly price record. No paid placements, and commissions never change our rankings.
The right protein powder depends entirely on your goal, and these three picks deliberately do not overlap. Protein powder is not one product, it spans clean-label simplicity, aggressive calorie loading, and stripped-down lean macros, and chasing the wrong one wastes both money and calories.
We have a plant-based organic hemp scoop for clean-label simplicity, a calorie-dense weight gainer for people trying to add size, and a fast-absorbing whey isolate for lean macros and recovery. Figure out whether you are topping up your diet, actively bulking, or watching every gram of fat and sugar, and the choice gets easy fast.
Here is what we weighed:
Best for: Hard gainers trying to put on size
$144.99 observed
Check price on AmazonISO100 is the pick for most lifters. 25g of protein at 1g fat, 1g sugar and under 120 calories is the cleanest macro split of the three, and hydrolysed isolate is the form that digests fastest after training. The Pro Gainer is not a competitor to it but a different product: 650 calories and 60g of protein per serving is a mass gainer, right if you are struggling to eat enough and wrong otherwise. The 365 hemp powder is the plant-based, short-ingredient-list option, and it ships unflavoured, so plan to blend it into something.
Basis: the nutrition panels on the labels, plus owner reviews. Protein powders are supplements, so their contents are not reviewed by the FDA before sale.
First, match the powder to your goal, because these three answer completely different questions. A weight gainer packs hundreds of extra calories and carbs specifically to help you grow, while a whey isolate strips out fat and sugar to keep macros lean for recovery without derailing a cut. Using one where you need the other actively works against you.
Decide between plant-based and whey next. Hemp and other plant proteins suit dietary preferences, sensitivities, or anyone whose stomach does not agree with dairy, whereas whey isolate absorbs fast and tends to pack more protein per scoop with fewer calories. Check the protein and calorie count per serving against your actual daily targets, not just the price per tub.
Certifications like USDA organic, non-GMO, or kosher matter if clean labeling is a real priority, and are worth checking before you buy. Finally, weigh flavor and mixability honestly, because the best protein powder on paper is worthless if it clumps in water or tastes bad enough that the tub sits unused in the cabinet.
Organic, non-GMO, kosher hemp protein from Whole Foods' 365 line keeps the ingredient list short and the price low.
$13.49 observed
Check price on Amazon
650 calories and 60g of protein per serving make this a true mass gainer, not just another protein scoop.
$144.99 observed
Check price on Amazon
A hydrolyzed whey isolate with 25g protein and barely any fat or sugar absorbs fast and keeps calories tight.
$144.09 observed
Check price on Amazon| Pick | Tier | Price, and when observed | Our rating | Best for |
|---|---|---|---|---|
| 365 by Whole Foods Market | Budget Pick | $13.49 on 2026-10-12 | 8.0 / 10 | Plant-based eaters who want a clean, simple label |
| Optimum Nutrition Gold Standard Pro Gainer | Best Value | $144.99 on 2026-10-12 | 9.0 / 10 | Hard gainers trying to put on size |
| Dymatize ISO100 Whey Protein Powder Isolate | Premium Pick | $144.09 on 2026-10-12 | 9.0 / 10 | Lean macros and fast post-workout recovery |
$13.49
Best for: Plant-based eaters who want a clean, simple label
This is the no-frills, plant-based option for people who care more about what is not in the tub than about chasing the highest protein number on the label. It is organic hemp seed protein, unflavored, and carries USDA organic, non-GMO, and kosher certifications, so the ingredient list stays short and verifiable.
Hemp is a solid choice if whey does not agree with your stomach, or if you simply prefer to keep things plant-based, and at this price point you are not overthinking a purchase that could otherwise involve a lot of label reading. It comes in a 16 oz size that is easy to keep on a shelf without committing to a huge tub.
The honest tradeoff is flavor and focus. It ships unflavored, so it needs a smoothie or something to mask the taste rather than a plain shake with water, and it leans toward clean sourcing over the sheer protein-per-scoop numbers a dedicated whey isolate delivers. For a plant-based daily staple, it is an easy, affordable choice.
| Source | Organic hemp seed |
| Flavor | Unflavored |
| Size | 16 oz |
| Certifications | USDA organic, non-GMO, kosher |
$144.99
Best for: Hard gainers trying to put on size
Pro Gainer is built for one job: helping you eat more without choking down extra meals throughout the day. Each serving stacks 650 calories, 60g of protein, and more than 80g of carbs, which is the kind of math that actually moves the scale for someone who struggles to eat in a surplus.
It comes from Optimum Nutrition's Gold Standard line, so the brand pedigree behind the formula is well established, and for a genuine hard gainer, someone who trains hard but cannot out-eat their metabolism, this solves a real problem that whole food alone often does not.
Be clear-eyed about who this is for, though. This is not a powder for someone trying to lean out, the calories and carbs are the entire point, not a side effect, so using it while cutting works directly against your goal. It also carries the highest price of the three picks here. For skinny lifters trying to bulk, it does exactly what it promises.
| Calories | 650 per serving |
| Protein | 60g per serving |
| Carbs | 80g-plus per serving |
$144.09
Best for: Lean macros and fast post-workout recovery
ISO100 is the pick when you want protein and not much else cluttering the label. Each serving delivers 25g of protein alongside 5.5g of BCAAs, including 2.7g of L-Leucine, while keeping things tight at 1g fat, 1g sugar, and under 120 calories, numbers that are hard to match once you start comparing tubs side by side.
It is filtered to cut excess lactose and carbs, and the protein itself is broken down into small peptides for faster absorption, exactly why people reach for it right after a workout rather than saving it for later in the day. Dymatize publishes third-party Informed-Choice testing on ISO100, which is the check that matters for anyone who gets drug tested.
The tradeoffs are the ones you would expect from a premium isolate. It carries a premium price per tub, and being whey-based, it is not an option if you are following a plant-based diet. For anyone watching macros closely, it is about as clean as protein powder gets.
| Protein | 25g per serving |
| BCAAs | 5.5g (2.7g L-Leucine) |
| Macros | 1g fat, 1g sugar, under 120 cal |
| Flavor | Fudge Brownie |
A versatile whey isolate like Dymatize ISO100 is an easy starting point because it is high in protein, low in fat and sugar, and mixes well. If you prefer plant-based, the 365 organic hemp powder keeps the ingredient list simple.
If you struggle to eat enough to grow, yes. A gainer like the Pro Gainer packs 650 calories and 60g of protein per serving to help you hit a surplus. If you are trying to stay lean or lose fat, skip it and choose a lean isolate instead.
A whey isolate like ISO100 is low-calorie and high-protein with minimal carbs and fat, made for lean recovery. A mass gainer is loaded with extra calories and carbs to help you put on size, so they serve opposite goals.
Plant proteins like hemp are a great fit for vegan diets or anyone sensitive to whey, and a certified organic option keeps the label clean. Whey isolates tend to pack more protein per scoop and absorb faster, so the best choice depends on your goal and diet.
The Dymatize ISO100 and Pro Gainer are flavored and mix fine with water alone. The 365 hemp powder ships unflavored, so it is worth blending into a smoothie with fruit rather than shaking it with plain water.
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