BioStacks
Best for
Ingredients (4)
L-Leucine
100%Dose
3000 mg
Target
2000–5000 mg
Form
—
Vitamin B6
6%Dose
1.4 mg
Target
25–100 mg
Form
—
L-Isoleucine
50%Dose
750 mg
Target
1500–4000 mg
Form
—
L-Valine
50%Dose
750 mg
Target
1500–4000 mg
Form
—
Other Ingredients (5)
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
LeucineFlow Aid
Branched-chain amino acid used as a processing aid
LeucineFlow Aid
Branched-chain amino acid used as a processing aid
L-ValineAmino Acid
Essential branched-chain amino acid; component of BCAA blends in 2:1:1 ratio with leucine and isoleucine
How to Take It
Best taken in the morning
Many people prefer B-vitamins earlier in the day; take with food to avoid nausea.
With food
On the label
When to take Essential BCAA 4:1:1 tablets? We recommend that you take 3 tablets daily. Plus, because they're a tablet it means they're easy to take while you're on the go. What do Essential BCAA 4:1:1 tablets work well with? To help you power through your workout 3 and add more weight to your squat or shave a second off your track time, add our Creatine Monhydrate tablets, proven to increase physical performance. 3
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
£13.49≈ $17.13
Cheaper than 95% of 165 muscle supplements
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).
This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.
The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.