HMB (beta-hydroxy beta-methylbutyrate) is a compound your body naturally produces when it metabolizes leucine, an essential amino acid found in protein-rich foods. It plays a key role in maintaining lean muscle — helping reduce muscle breakdown while supporting your body's ability to build and repair muscle tissue. The problem is that your body produces only small amounts of HMB naturally, even with a high-protein diet. Research consistently shows that 3g per day is where meaningful muscle-protective benefits appear.

HMB works through two main pathways. First, it slows the breakdown of muscle protein — particularly helpful during periods of stress on the body like caloric restriction, illness, inactivity, or aging. Second, it supports the body's natural muscle-building process by activating key signaling pathways involved in protein synthesis. Together, these two actions help your body maintain more lean muscle than it otherwise would under the same conditions.

HMB has been shown to support lean muscle mass through its dual action of reducing breakdown and supporting synthesis. In studies that combine HMB with resistance exercise, participants have seen improved strength and muscle composition compared to exercise alone. For people not doing structured exercise, HMB (particularly in combination with Vitamin D3) has still shown meaningful benefits in preserving lean muscle — especially in older adults.

Yes. HMB has an extensive safety record across more than 30 years of clinical research in both men and women, across a wide age range. Studies tracking hematological, cardiovascular, and metabolic markers have consistently found no adverse effects at the studied doses. The myHMB® form used in 4LIVN is USP verified, meaning it meets rigorous standards for purity and potency.

3g per day is the dose consistently used in clinical research and where meaningful benefits have been observed. Research looking at higher doses has not shown proportionally greater benefits, so more isn't necessarily better. Just take the recommended 6 chews per day as directed.

Take 6 chews per day. Timing isn't critical — morning, evening, with or without food, all work. What matters most is consistency. HMB accumulates in your system over time, so daily use is more important than when exactly you take them. The sour orange chews are designed to be something you actually enjoy, so building a daily habit should feel natural rather than forced.

HMB is a muscle preservation and support compound, not a stimulant or immediate-effect supplement. Most people notice changes over weeks — improved recovery, less soreness after activity, and sustained strength. The most meaningful benefits — maintaining lean muscle mass over time — are cumulative. We recommend committing to at least 8–12 weeks of consistent daily use to properly evaluate results.

Yes — this is one of the most common reasons people reach for 4LIVN. HMB has been specifically studied in calorie-restricted and weight-loss contexts, where preserving lean muscle is particularly important. That said, we always recommend consulting your physician before adding any new supplement to your routine, especially if you're managing other health conditions or working with a doctor on a structured weight loss program.

Yes, 4LIVN HMB Fruit Chews are 100% vegan and use a pectin base (not gelatin). Other ingredients include: Apples, Orange Juice Concentrate, Organic Baobab Fruit Pulp Powder, and less than 2% each of Pectin, Medium Chain Triglycerides, and Natural Orange Flavor. No artificial colors, no artificial sweeteners, no junk.

Pregnant or lactating women should consult a physician before use, as safety studies have not been conducted specifically in these populations. Adolescents and individuals with known medical conditions should also consult their physician before starting any new dietary supplement. These chews are formulated for healthy adults 18 and older.

We stand behind 4LIVN products with a 90-day satisfaction guarantee. If you're not satisfied with your purchase for any reason, email us at hello@4livn.com within 90 days of purchase and we'll make it right. We believe in what we make and we want you to feel confident in trying it.

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