Home Ingredients Carbelac® (Whey Protein Concentrate — Carbery)
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Carbelac® (Whey Protein Concentrate — Carbery)

Evidence Level
Limited
1 Clinical Trial
4 Documented Benefits
2/5 Evidence Score

Carbelac® is a whey protein concentrate from Carbery, described by the supplier as made from grass-fed Irish dairy and providing 35 to 80% protein, with the branched-chain amino acids including leucine that whey naturally contains. It is a bulk ingredient that manufacturers add to protein powders, bars and other foods. No published trial has tested Carbelac itself; the studies cited on this page tested generic whey and other protein supplements.

Studied Dose No dose of Carbelac itself has been tested. Whey protein powders are commonly used at 20 to 40 g per serving; the cited pooled analyses covered generic whey trials in adults 60 and over, and protein supplement trials (typically about 24 g after training) in healthy adults doing resistance training.
Active Compound Whey protein concentrate (35 to 80% protein), rich in BCAAs and leucine.

Benefits

Muscle and strength in adults 60 and over: mostly null

Whey protein is a complete, leucine-rich protein that helps people meet daily protein targets. The older-adult study cited on this page, a 2024 meta-analysis of 26 randomized trials in 2,105 adults aged 60 and over, found whey protein did not significantly improve handgrip strength (SMD 0.18) or lean body mass (SMD 0.02). The one significant result was lower-body strength, and only when whey was combined with resistance training (SMD 0.25), so the exercise may account for much of that effect. The trials used generic whey protein, not Carbelac.

Supported by Trial 1

Recovery: not tested on this page

Whey is digested quickly and supplies all nine essential amino acids, which is why it is popular after training. No trial has tested Carbelac for recovery, and neither study cited on this page measured recovery; they measured strength, muscle mass and walking ability.

Supported by Trial 1

Healthy aging and protein gap

Whey protein has been studied in adults aged 60 and over, and the pooled results were largely null. In the 2024 meta-analysis of 26 trials and 2,105 participants, handgrip strength, gait speed, the 6-minute walk test and lean body mass all showed no significant improvement with whey protein. Extra protein can still help older adults reach daily protein targets, which is a nutrition point rather than a proven effect of this ingredient.

Supported by Trial 1

Strength gains with resistance training, from generic protein and whey trials

Carbelac itself has never been tested. A pooled analysis of 49 trials in 1,863 healthy adults lifting weights (whey the most common supplement; about 24 g after training on average) found protein added 2.49 kg to one-rep-max strength gains versus control. The gain is small. Fat-free mass rose 0.30 kg more, less so with age, with no further gain above about 1.6 g/kg/day of total protein. One author reported dairy-industry funding.

Supported by Trial 1

Mechanism of action

1

Leucine-triggered muscle synthesis

Whey is rich in leucine, which in laboratory research activates the mTOR pathway involved in muscle protein synthesis. This is a mechanism observed in the lab, and on its own it does not show that Carbelac changes strength or muscle size in people.

2

Complete amino acid profile

Whey provides all nine essential amino acids in a fast-digesting form, so it counts as a complete protein source. That is a fact about what whey contains, not a measured outcome from any trial of Carbelac.

Clinical trials

1
Generic Whey Protein in Adults 60 and Over: Meta-Analysis With Mostly Null Results
PubMed

Systematic review and meta-analysis pooling 26 randomized trials with 2,105 participants aged 60 and over, testing generic whey protein supplements rather than Carbelac. (Al-Rawhani et al. 2024, Clinical Nutrition)

2,105 participants aged 60 and over, pooled from 26 randomized trials. No athletes and no younger adults were included, so the results say nothing about sports performance.

Most outcomes were not significant. Handgrip strength (SMD 0.18), the 6-minute walk test (SMD -0.08), gait speed (SMD -0.08) and lean body mass (SMD 0.02) all showed no significant benefit from whey protein. The only significant finding was lower-body strength when whey was combined with resistance training (SMD 0.25), meaning the exercise may be doing much of the work. Carbelac is a whey protein concentrate, but this analysis did not test Carbelac.

Side effects and drug interactions

Common Potential side effects

Generally well-tolerated.
Contains milk; avoid if you have a dairy allergy.
Those with lactose intolerance may prefer a low-lactose or isolate form.

Important Drug interactions

Generally compatible with medications.
May affect absorption of some antibiotics; separate dosing if advised.
Tell your doctor if you have kidney disease before high-protein intake.

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Frequently asked questions about Carbelac® (Whey Protein Concentrate — Carbery)

What is Carbelac?

Carbelac® is a whey protein concentrate from Carbery, described by the supplier as made from grass-fed Irish dairy and providing 35 to 80% protein, with the branched-chain amino acids including leucine that whey naturally contains. It is a bulk ingredient that manufacturers add to protein powders, bars and other foods.

What is Carbelac used for?

Carbelac is researched primarily for Muscle & Recovery and Athletic Performance. Whey protein is a complete, leucine-rich protein that helps people meet daily protein targets. The older-adult study cited on this page, a 2024 meta-analysis of 26 randomized trials in 2,105 adults aged 60 and over, found whey protein did n…

What is the recommended dosage of Carbelac?

No dose of Carbelac itself has been tested. Whey protein powders are commonly used at 20 to 40 g per serving; the cited pooled analyses covered generic whey trials in adults 60 and over, and protein supplement trials (typically about 24 g after training) in he… Always follow the product label and check with a healthcare provider for personal advice.

Is Carbelac safe, and does it have side effects?

Side effects and cautions reported for Carbelac include: Generally well-tolerated. Contains milk; avoid if you have a dairy allergy. It may also interact with some medications. Carbelac is not right for everyone, so check with a healthcare provider first if you are pregnant or breastfeeding, have a medical condition, or take prescription medication.

Does Carbelac interact with any medications?

Possible interactions include: Generally compatible with medications. May affect absorption of some antibiotics; separate dosing if advised. If you take prescription medication, check with a pharmacist or doctor before using it.

How strong is the scientific evidence for Carbelac?

NutraSmarts rates the evidence for Carbelac as Limited (2 out of 5). It is backed by 1 study summary and 2 cited references summarized on this page. A higher rating reflects more, larger, and better-designed human studies.

References(2 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Al-Rawhani AH, Adznam SN, Abu Zaid Z, et al. Effectiveness of whey protein supplementation on muscle strength and physical performance of older adults: A systematic review and meta-analysis. Clin Nutr. 2024;43(10):2412-2426..PubMedUsed to support: Meta-analysis of generic whey protein in 2,105 adults aged 60 and over that found no significant effect on handgrip strength, gait speed, the 6-minute walk test or lean body mass; only lower-body strength improved, and only alongside resistance training. It did not test Carbelac.
  2. Morton RW, Murphy KT, McKellar SR, Schoenfeld BJ, Henselmans M, Helms E, Aragon AA, Devries MC, Banfield L, Krieger JW, Phillips SM. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. Br J Sports Med. 2018;52(6):376-384..PubMedUsed to support: Generic class evidence, not Carbelac: across 49 randomized trials (1,863 healthy adults) of resistance training lasting 6 weeks or more, protein supplements (whey was the most common; protein taken after training averaged about 24 g) added 2.49 kg to 1RM strength gains and 0.30 kg to fat-free mass gains versus control. The fat-free mass effect fell with age and did not grow above about 1.62 g/kg/day of total protein. One author reported US National Dairy Council support.