30 servings · 120 capsules

Peptide
PeptiStrong®.

★★★★★★★★★★ 4.5 22 ratings
£29.99£1.00 / serving
or £25.49 with Subscribe and save Save 15%
  • ✓2400mg of AI-discovered PeptiStrong® per four-capsule serving
  • ✓Four capsules a day, 30 servings from 120 capsules
  • ✓75µg vegan vitamin D3. Vitamin D contributes to the maintenance of normal muscle function and normal bones
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14-day returnsGMP-certified facilitiesMade in the UKVegan friendly
ISO 22000 facility✳2400mg PeptiStrong®✳AI-discovered peptides✳Employee owned · est. 2013✳
ISO 22000 facility✳2400mg PeptiStrong®✳AI-discovered peptides✳Employee owned · est. 2013✳
The formula

Two actives. Both on the label.

PeptiStrong® is a patented peptide complex made from hydrolysed fava bean protein, discovered using AI. Four capsules carry 2.4g of PeptiStrong® alongside vegan vitamin D3 from lichen. Four capsules a day, 30 servings from 120 capsules.

01 · The peptide
2400mg
PeptiStrong®

Hydrolysed fava bean peptides. 2400mg per four-capsule serving.

02 · The co-factor
3000IU
Vegan Vitamin D3

75µg from lichen rather than sheep wool. Vitamin D contributes to the maintenance of normal muscle function. Vitamin D contributes to the maintenance of normal bones.

At a glance

What is in each serving.

Three facts from the label, per four-capsule serving.

2.4g
PeptiStrong®
Per four-capsule serving.
75µg
Vitamin D3
Per four-capsule serving (3000 IU).
4
Capsules a day
One serving, taken with water.

Amounts as printed on the label.

Transparent label

Inside the capsule.

We don't hide behind proprietary blends. Two actives, every milligram listed: 2.4g of PeptiStrong® and 75µg of vitamin D3 per serving.

PeptiStrong®
2400mg
Per four capsules
Four capsules a day, 30 servings from 120 capsules. No proprietary blend, no fractional serving to make the label look better.
Vitamin D3
75µg
3000IU, vegan
Sourced from lichen rather than lanolin, so the formula stays suitable for vegans and vegetarians.
Format
4
Capsules a day
One month of servings per tub. Take them with your post-workout meal. Nothing to mix, no flavour to get bored of.
0g
Sugars
Per four capsules
0g
Fat
Capsule shell only
30
Servings
One month per tub
120
Capsules
HPMC, vegan
Nothing hidden

The full label.

Two actives, listed first, each with its dose. Ingredients, allergens and nutrition for Peptide, as printed on the tub.

Ingredients

Hydrolysed fava bean (Vicia faba) protein (as PeptiStrong®), brown rice flour (gluten free), anti-caking agents (silicon dioxide, magnesium stearate), vegan vitamin D3 (lichen), capsule shell (hydroxypropyl methylcellulose).

Allergen advice

No known allergens. Manufactured in a GMP Certified factory that handles fish, celery, soya, nuts, wheat and gluten.

VEGAN FRIENDLYGMP-CERTIFIED FACILITIESMADE IN THE UK
Nutritional information
Serving size 4 capsules · 30 servings
Per 4 capsPer capsule
PeptiStrong® (hydrolysed fava bean peptides) 2400 mg 600 mg
Vitamin D3 (from lichen) 3000 IU 750 IU
Vitamin D3 75 µg 18.75 µg
Energy 0 kcal 0 kcal
Sugars 0 g 0 g
Take four capsules daily with water, ideally alongside your post-workout meal.
The research

What the studies found.

PeptiStrong® has two published human trials at 2.4g a day, the amount in four Efectiv capsules. Both were small, and both were run or funded by Nuritas, which makes the ingredient. Here is what each one tested and found, limits included.

How close is the research to this product?
  1. 1 This product Not tested itself
  2. 2 Same ingredient, same daily amount Where these studies sit
  3. 3 Same ingredient, other amounts Not used here
  4. 4 Related ingredients or lab work Not used here
01 · Kerr 2023 · Nutrients

Strength recovery after a hard leg session

Who
30 healthy men aged 30 to 45 (44 started)
Amount
2.4g a day
How long
14 days, then a muscle-damaging leg session
Design
Randomised, double-blind, placebo-controlled pilot
What they found

Over the three days after the session, leg strength recovered better than with a placebo. The difference was not significant at any single time point.

Limits

A small pilot in men only, registered after it began, with no correction for testing several outcomes.

Nuritas staff co-authored and helped run itRead the paper ↗
02 · Mohan 2025 · BMJ Nutrition, Prevention & Health

Strength across eight weeks of training

Who
Untrained men and women aged 19 to 40 (72 started, 55 analysed)
Amount
2.4g a day
How long
56 days, training three times a week
Design
Randomised, double-blind, placebo-controlled
What they found

Leg-extension strength was higher than with a placebo at four and eight weeks. The gain from the start, 14.4kg against 12.3kg, was not significantly bigger. Bench press did not differ.

Limits

About a quarter of the people who started were left out of the analysis, and the statistical tests were one-sided.

Funded by Nuritas, and all authors work thereRead the paper ↗

This Efectiv product was not itself tested in these studies, and results vary between people. This is a summary of published research on PeptiStrong®, not a promise of results.

Reviewed October 2026
How to use

Four capsules, once a day.

No mixing and no flavour to get bored of. Take them with water, ideally alongside your post-workout meal.

Four capsules,

4
Capsules
Water
Small glass
Daily
Every day
With water
A small glass is all it takes
With food
Take with your post-workout shake or a protein meal
The Efectiv difference

How we compare.

Peptide next to typical peptide and amino acid supplements on dose, transparency, added Vitamin D3 and cost per serving. Every dose is on our label, so you can check it yourself.

EFECTIV Peptide
Other brands
PeptiStrong® per serving
2400mg
Usually not included
Transparent dosing
✓
Usually
Vegan Vitamin D3 included
✓
✕
Designed for athletes
✓
Often
Price per serving
£1.00
£0.58–£1.50

Comparison against leading UK peptide, collagen and amino acid supplements, per labelled serving. Competitor price per serving based on list price. Checked October 2026.

Verified reviews

What people say.

4.5 ★★★★★★★★★★
Based on 22 verified ratings

Verified Peptide reviews from customers who bought it, collected by Lipscore. Good or bad, every review is published.

22
Verified ratings
via Lipscore
★★★★★
2.4g PeptiStrong® per Serving, 30-Day Supply

All Peptide reviews.

Collected & verified by Lipscore
On the label

Quality you can check.

Peptide is made in the UK to ISO 22000 standards, with every active ingredient printed on the label with its dose.

Ingredients
Listed in full
Formula
Full dosages listed
Manufacturing
UK, ISO 22000
Label
Every dose listed
Kyle Raison
Our athletes
“Everyone is talented at something, you just have to find what your talent is.”
Kyle Raison
PCA Pro · Efectiv Athlete
18
Efectiv athletes
4.5
22 ratings
6
Sports backed
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Before you ask

Questions, answered.

2.4g PeptiStrong® per serving. 75µg vitamin D3, which contributes to the maintenance of normal muscle function and normal bones.
Yes. Peptide does not replace adequate dietary protein. Protein contributes to the growth and maintenance of muscle mass, so you should continue meeting your daily protein needs through food and, if helpful, a protein supplement.
Peptide · 30 servings
Rated 4.5 out of 5 from 22 reviews