The Core Longevity Stack

Why It Matters

Creatine isn't just for gym performance. It's a cellular energy buffer — replenishing ATP in tissues with high metabolic demand, including the brain and skeletal muscle. As phosphocreatine stores decline with age, supplementation helps maintain the energy substrate that powers everything from cognitive function to muscle contraction.

The Evidence

The International Society of Sports Nutrition position stand (Kreider et al., 2017) reviewed over 500 studies and concluded creatine monohydrate is the most effective ergogenic nutritional supplement for increasing high-intensity exercise capacity and lean body mass. Beyond performance, research by Rae et al. (2003) demonstrated significant improvements in working memory and processing speed in healthy adults supplementing with creatine. A meta-analysis by Forbes et al. (2019) found creatine augmented lean mass gains in older adults during resistance training — relevant to age-related sarcopenia prevention.

Dosage

3–5 g daily, no loading phase necessary. Take with any meal. Monohydrate is the only form with robust evidence — skip the hydrochloride, ethyl ester, and buffered variants. Timing doesn't matter. Consistency does.

Recommended: Thorne Creatine Monohydrate — third-party tested, NSF Certified for Sport.

Read the full deep-dive: Creatine: Beyond Muscle

Why It Matters

Magnesium is involved in over 300 enzymatic reactions — energy metabolism, protein synthesis, DNA repair, and neuromuscular function. Subclinical deficiency is common: NHANES data suggests nearly half of U.S. adults consume less than the estimated average requirement. The gap between "not clinically deficient" and "optimally supplied" is where supplementation earns its place.

The Evidence

A systematic review by Volpe (2013) established that magnesium status directly affects exercise performance, oxygen uptake, and muscle function. Research by Held et al. (2002) demonstrated that magnesium supplementation improved sleep quality in elderly subjects with insomnia — increasing sleep time, reducing cortisol, and raising melatonin. Barbagallo and Dominguez (2010) linked chronic magnesium deficiency to accelerated aging, increased oxidative stress, and heightened inflammatory markers.

Dosage

200–400 mg elemental magnesium daily. Glycinate for general use and sleep support (well-absorbed, minimal GI issues). Threonate (Magtein) if targeting cognitive function — it crosses the blood-brain barrier. Avoid oxide — poor bioavailability despite high elemental content. Take in the evening for sleep benefit.

Recommended: Thorne Magnesium Bisglycinate — chelated for absorption, no fillers.

Read the full deep-dive: Magnesium: Forms and Dosing

Why It Matters

Vitamin D is not really a vitamin — it's a secosteroid hormone that regulates the expression of over 1,000 genes. It governs calcium metabolism, immune function, and inflammatory response. K2 (menaquinone) directs calcium to bones and teeth instead of arterial walls. They're a package deal: D3 without K2 risks calcium misallocation.

The Evidence

Holick (2007) documented the pandemic of vitamin D deficiency and its association with increased risk of common cancers, autoimmune diseases, cardiovascular disease, and all-cause mortality. A Cochrane review by Bjelakovic et al. (2014) found that vitamin D3 reduced mortality in elderly populations. Knapen et al. (2013) demonstrated that K2 supplementation (MK-7 form) improved bone mineral density and reduced arterial stiffness in postmenopausal women — the calcium-directing mechanism in action.

Dosage

2,000–5,000 IU D3 daily with 100–200 mcg K2 (MK-7). Take with a fat-containing meal — D3 is fat-soluble. Get 25(OH)D blood levels tested; target 40–60 ng/mL. Most people at typical latitudes are below 30 ng/mL without supplementation. Liquid form improves absorption.

Recommended: Thorne Vitamin D/K2 Liquid — combined formula, accurate dosing via dropper.

Why It Matters

Chronic low-grade inflammation drives the major diseases of aging — cardiovascular disease, neurodegeneration, metabolic syndrome. EPA and DHA are the body's primary tools for resolving inflammation. The modern Western diet delivers omega-6 to omega-3 ratios of 15:1 or higher; evolutionary estimates suggest 2:1 was the norm. Supplementation corrects the imbalance.

The Evidence

The VITAL trial (Manson et al., 2019) — a randomized controlled trial of 25,871 participants — found that omega-3 supplementation reduced the risk of heart attack by 28% and fatal heart attack by 50% in participants with low baseline fish intake. Yurko-Mauro et al. (2010) demonstrated that DHA improved memory and cognitive function in healthy older adults with mild memory complaints. Harris and Von Schacky (2004) proposed the Omega-3 Index — an EPA+DHA blood level target of 8–12% — as a risk factor for cardiovascular mortality.

Dosage

2–3 g combined EPA/DHA daily. Look at the EPA/DHA content, not total fish oil volume — most capsules are 30% omega-3, so "1000 mg fish oil" is only 300 mg of what matters. Triglyceride form absorbs better than ethyl ester. Take with food to reduce GI discomfort. Store refrigerated to prevent oxidation.

Recommended: Nordic Naturals Ultimate Omega — triglyceride form, third-party tested for purity.

Why It Matters

Collagen is the most abundant protein in the human body — it's the structural scaffolding for skin, tendons, ligaments, cartilage, and bone. Endogenous collagen production declines roughly 1% per year after age 25. Hydrolyzed collagen peptides provide bioavailable amino acids (glycine, proline, hydroxyproline) that support the body's repair and maintenance processes.

The Evidence

A meta-analysis by de Miranda et al. (2021) found that collagen peptide supplementation significantly improved skin elasticity and hydration versus placebo across multiple randomized controlled trials. Clark et al. (2008) demonstrated reduced joint pain in athletes supplementing with collagen hydrolysate. Zdzieblik et al. (2015) showed that collagen peptides combined with resistance training increased fat-free mass and muscle strength in sarcopenic elderly men compared to resistance training with placebo.

Dosage

10–15 g daily of hydrolyzed collagen peptides. Dissolves in coffee, smoothies, or water — flavorless in most forms. Take with vitamin C to support endogenous collagen synthesis (ascorbic acid is a required cofactor). Type I and III for skin and connective tissue; Type II for joint cartilage.

Recommended: Vital Proteins Collagen Peptides — grass-fed, hydrolyzed, third-party tested.