ISO100 Hydrolyzed Review
Overview
ISO100 takes a different bet than most products on this list: instead of blending isolate with something else, Dymatize fully hydrolyzes the entire protein matrix — pre-cleaving it into di- and tri-peptides before it ever reaches your shaker. The result is the highest DIAAS score in our test (1.11) and functional lactose content below 0.5g, making it the closest thing to a clinical post-workout formulation sold at retail. The tradeoff is a noticeably higher price and a faint bitterness that's a known characteristic of hydrolysis, not a manufacturing flaw.
Dymatize ISO100 is built for one purpose: get amino acids into the bloodstream as fast as biologically possible. The entire protein matrix is enzymatically hydrolyzed — pre-cleaved into di- and tri-peptides — so your digestive system barely needs to engage before amino acids hit circulation. At 25g protein and 120 calories with effectively zero fat, zero sugar, and <0.5g lactose, this is the closest thing to a clinical-grade post-workout formulation available off the shelf.
Buy It If
Absorption speed is your priority — post-workout timing, a compressed eating window, or genuine lactose intolerance where even trace lactose causes issues.
Skip It If
You're mixing protein into smoothies or baked goods where a slight bitter note would be noticeable, or you're price-sensitive — full hydrolysis is an expensive process and it shows in the shelf price.
Pros & Cons
Pros
- Fastest amino acid absorption of all 10
- Functionally lactose-free (<0.5g)
- Highest DIAAS score (1.11)
- Informed Choice batch certified
Cons
- Higher price per serving
- Slight bitter aftertaste from hydrolysis
- Limited flavour options
Nutrition Facts
Per single scoop (31g serving):
Nutrition Facts
Protein Quality
ISO100 Hydrolyzed is Dymatize's flagship fast-absorption formula, and the manufacturing process is the entire story here: rather than isolating whey and stopping, Dymatize enzymatically hydrolyzes the full protein matrix, pre-cleaving long protein chains into smaller di- and tri-peptides before packaging. This is a more expensive and technically demanding process than standard isolation, which is reflected in both the price and the faster absorption profile.
Bioavailability
PDCAAS 1.0, DIAAS ~1.11 — highest DIAAS score of any product on this list. Peak plasma amino acids reached in 20–25 minutes post-ingestion.
Filtration Process
Full enzymatic hydrolysis of CFM whey isolate. Multi-stage membrane filtration removes residual lactose to <0.5g per serving.
Leucine Yield
~2.7g per serving. Hydrolysis preserves leucine integrity; rapid free-form peptide release triggers acute MPS with exceptional speed and efficiency.
Amino Spiking
Fully clean on HPLC assay. Informed Choice provides ongoing batch verification — zero non-protein nitrogen detected across all tested batches.
Ingredient Breakdown
The ingredient list includes hydrolyzed whey protein isolate as the primary source, with natural and artificial flavors, sucralose and acesulfame potassium as sweeteners, and soy lecithin. Notably free of added creatine, BCAAs, or other proprietary blends — this is a protein-first formulation without filler ingredients competing for label space.
Whey Protein (Isolate/Concentrate/Hydrolysate)
Lecithin (Soy or Sunflower)
Artificial & Natural Flavors
Taste & Mixability
Gourmet Chocolate mixes exceptionally well — thin, smooth, and free of the grittiness sometimes associated with heavily processed proteins. The hydrolysis process does impart a faint bitterness that's detectable to some palates, particularly noticeable when mixed with only water rather than milk; blending with a small amount of milk or a frozen banana largely masks it.
Digestion
ISO100's full hydrolysis is specifically relevant here: the protein is pre-broken into smaller peptide chains before it ever reaches you, meaning less digestive work and functionally low lactose (our testing found under 0.5g per serving). This makes it one of the better-tolerated options on this list for people with real digestive sensitivity, not just casual bloating concerns. The tradeoff, unrelated to digestion but worth flagging in the same breath, is a faint bitterness some palates pick up from the hydrolysis process itself.
Value For Money
At about $0.069 per gram of protein, ISO100 costs meaningfully more than isolate-only competitors like Impact Whey — you're paying for the additional hydrolysis processing step, not just branding.
Lab Testing & Quality
ISO100 carries a Banned Substance Tested claim from Dymatize's internal testing program, and posted the highest DIAAS score in our test (1.11) — a digestibility-adjusted amino acid score that reflects both amino acid completeness and how well your body actually absorbs it, which is a more complete quality signal than protein percentage alone.
User Feedback Summary
How ISO100 Hydrolyzed Compares to Our #1 Pick
R1 Protein's hydrolysate is only part of its formula; ISO100 is hydrolyzed end-to-end, which is why it edges out R1 on DIAAS score (1.11 vs 1.09) despite R1 taking the overall #1 spot on a broader set of criteria.
| Spec | ISO100 Hydrolyzed |  R1 Protein (#1) |
|---|---|---|
| Lab Score | 8.9/10 | 9.8/10 |
| Protein | 25g | 25g |
| Sugar | <1g | <1g |
| Calories | 120 | 110 |
| Price / Serving | ~$1.73 | ~$1.49 |
| Best For | Lactose-Sensitive Athletes | Cutting & Competition Prep |
Optimum Nutrition Gold Standard — A Closer Look
See our Gold Standard comparison above — ISO100 wins on absorption speed and lactose content, Gold Standard wins on flavor variety and price. If you're choosing between these two specifically, the deciding factor is usually whether you have genuine lactose sensitivity (choose ISO100) or just want the most reliable, widely available option with the best flavor selection (choose Gold Standard).
Other Options Worth Considering
If the bitterness of hydrolysis isn't for you but you still want fast absorption, R1 Protein (#1) uses a partial hydrolysate blend with a milder taste profile. If you want ISO100's purity without the price premium, Impact Whey Isolate (#2) is a non-hydrolyzed but still high-purity alternative.
Frequently Asked Questions
The whey protein has been enzymatically pre-broken into smaller di- and tri-peptide chains before packaging, so your digestive system does less work to release amino acids into your bloodstream — that's why absorption is faster.
Not zero, but functionally close — our lab testing found under 0.5g of lactose per serving, low enough that most lactose-sensitive users tolerate it without issue, though it's not certified lactose-free for severe intolerance.
The hydrolysis process that speeds up absorption also breaks down proteins into smaller peptides that read as faintly bitter on the palate — it's an inherent tradeoff of the process, not a quality defect.
Full enzymatic hydrolysis is a more complex and costly manufacturing process than standard cross-flow microfiltration alone — you're paying for the additional processing step that produces faster absorption, not just marketing.
Its low lactose content and pre-digested peptide structure make it easier to tolerate for some people with digestive sensitivity, but it is not a medical food — anyone using it for a specific medical nutrition need should consult their physician or a registered dietitian first.
No meaningfully — at under 1g of sugar per serving and a protein-dominant macro profile, it has minimal impact on blood glucose for most users, though anyone managing diabetes should still account for total daily carbohydrate intake.
Yes — it's straightforward to use (just protein powder and liquid, no complex timing protocols) and widely available, making it a reasonable choice for someone new to supplementing with protein.
Yes — whey protein has no gender-specific contraindication, and ISO100 Hydrolyzed is formulated the same way regardless of who's using it. Serving size and daily protein targets should be based on your individual goals and bodyweight, not gender.
At roughly $0.069 per gram of verified protein, this sits at a real premium compared to the cheapest options on our list — whether it's 'worth it' depends on whether the specific advantages covered in our Lab Testing and Digestion sections above matter for your situation, or whether you'd be equally well served by a cheaper option.
Final Verdict
ISO100 Hydrolyzed earned a 8.9/10 lab score in our independent testing of 47 protein powders, landing at #4 on this list. Absorption speed is your priority — post-workout timing, a compressed eating window, or genuine lactose intolerance where even trace lactose causes issues.
