Active Adults Muscle Support

For adults staying strong for the long run

Stay strong for the life you're living.

3g myHMB® — the dose used in the clinical research

Lean muscle is what keeps you doing the things you don't think about — carrying the groceries, taking the stairs, keeping up. 4LIVN HMB Fruit Chews deliver the clinically studied 3g dose of myHMB®, in a chew you'll actually take every day.

Start protecting your muscle — $29.99 No water. No capsules.

★★★★★ USP Verified myHMB® · Vegan · third-party tested

myHMB® Free Acid
per 6-chew serving — the full studied dose, not rounded down.

USP Verified

myHMB® USP Verified Informed Ingredient Certified 3g clinically studied dose Vegan · pectin-based

Why muscle, and why it's worth protecting

The strength you have is worth keeping.

Lean muscle does the quiet work of everyday life — and the body naturally maintains less of it as the years go on. That's normal. The good news: protecting the muscle you have is far simpler than rebuilding it later, and it comes down to one thing — consistency. HMB is one of the most studied compounds for supporting lean muscle, and at 3 grams a day (the amount used in the research), it helps your body hold on to what you've built.

The dose the research used

3g of myHMB® per serving — the amount used in the published HMB studies. We deliver the full dose and don't round down.

What HMB is

A compound your body makes naturally from the amino acid leucine — studied for over 30 years for its role in supporting lean muscle.

A form you'll actually take

A chew, not a capsule or powder. No water, no mixing — because the benefit comes from taking it consistently.

Benefit 01

Protect what keeps you capable.

The muscle you have now is what lets you do the things you don't think about — carrying things, climbing stairs, getting up from the floor, moving through a day without your body slowing you down.

HMB has been studied for over 30 years for its role in supporting lean muscle, taken at a steady daily dose. Not for athletes chasing performance — for people who want to keep functioning well for a long time.

The ingredient

myHMB® — the only USP-Verified HMB

USP Verified and Informed Ingredient Certified. You're getting exactly what the label says: nothing added, nothing missing.

Benefit 02

Feel capable, day after day.

How it works

Support, not stimulation

HMB may help reduce the rate at which muscle protein breaks down, and supports the signals your body uses to maintain lean tissue. No caffeine, no jitters.

One of the quieter parts of aging is fatigue that shows up where it didn't before — taking longer to bounce back from a long walk or a full day. Some of that is normal. Some of it is muscle protein breakdown outpacing repair.

The goal here isn't high performance. It's ordinary capability, maintained — feeling like yourself, able to do the things that matter without your body slowing you down. That's what we built this for.

Benefit 03 — why a chew

The form you'll actually take every day.

Most supplements are easy to skip. Capsules get forgotten, powders sit unused — and the research is clear that a 3-gram daily dose, taken consistently, is what matters. We made 4LIVN a fruit chew because a supplement you actually take works better than one you don't.

myHMB® Free Acid

The free-acid form is what makes a real chew possible — fast to absorb, no chalky capsule to swallow.

Apple pectin, not gelatin

Plant-based and vegan, and it holds the full 3g dose cleanly — no big pills, no animal gelatin.

Short ingredient list

No artificial colors, no fillers, no proprietary blends. It's short because it doesn't need to be long.

Nothing hidden

See exactly what you're taking.

myHMB® USP VerifiedThe gold standard for HMB

Informed Ingredient CertifiedIndependently verified

Third-party testedEvery batch · COA available

The label, in the open.

Six chews deliver 3g of myHMB® Free Acid — the full clinically studied dose. Apple-pectin base, vegan, with a short ingredient list and no proprietary blends.

Start today

Protect the muscle you've built.

Start with a single pouch, or set up your month and save. Cancel anytime — no lock-in.

Single Pouch

$29.99

90 chews · ~15-day supply (6 chews/day) · one-time

Best value

One Month — 2 Pouches

$53.98/mo$59.98

30-day supply · save 10% · about $1.80/day

3g clinically studied dose myHMB® USP Verified Vegan · pectin-based · no fillers

Start your month

60-day money-back guarantee · free shipping over 50 · made with myHMB®

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The research

The science behind HMB isn't new.

HMB has been studied since the early 1990s, much of it in adults who were getting older or eating less — exactly who this is for. The 3-gram daily dose isn't arbitrary; it's what the clinical trials used. Research suggests HMB supports lean muscle; individual results vary.

30+years of peer-reviewed HMB research

3gthe daily dose used in the studies

750+studies reviewed in the 2024 ISSN Position Stand

Selected research: ISSN Position Stand on HMB (2024) · Bear et al., 2019 (meta-analysis, 15 RCTs, 2,137 participants) · Wu et al. (older adults) · Fuller et al., 2011 (HMB Free-Acid absorption). Read the published research at myHMB.com. [T2 — founder review before publish.]

Honest answers

The stuff worth knowing up front.

Are these actually sour?

Yes — really sour, on purpose. The sourness comes from the myHMB® Free Acid at the full 3g dose, not from added flavoring. Chilled chews taste a little smoother. We'd rather tell you up front than have it surprise you.

How many a day, and how long does a pouch last?

Six chews a day for the full 3g dose. A 90-count pouch is about a 15-day supply; the monthly plan sends two pouches so you're covered for the month.

Is HMB safe?

Studies tracking hematological, cardiovascular, and metabolic markers have not identified adverse effects at the studied doses in healthy adults. HMB also hasn't shown negative effects on glucose or insulin.

Does it replace creatine?

No — they do different jobs and are often used together. HMB is studied specifically for supporting lean muscle, especially in adults who are older or eating less.

Why a chew, not a gummy or capsule?

Apple pectin (not gelatin) holds the full 3g dose cleanly and keeps it vegan, and a chew gets taken more consistently than capsules or powder. Consistency is where the benefit comes from.

How is it tested?

myHMB® is USP Verified and Informed Ingredient Certified, and every batch is third-party tested. A Certificate of Analysis is available on request.

$29.99 single pouch