What the research found

Supplement use has grown substantially, but the evidence for blanket supplementation in older adults is weak. Rather than asking whether supplements are inherently beneficial, the more useful question is whether an individual has a specific deficiency worth treating.

Nutritional gaps become more common with advancing age due to several intersecting factors: diminished appetite, dental problems affecting food intake, medication side effects that impair nutrient absorption, and dietary patterns that may fill the stomach without meeting actual nutrient needs. These challenges mean some older adults genuinely do face deficiency risks that food alone may not resolve.

The research identifies a few supplements with clearer evidence for targeted use: vitamin B12 (particularly when stomach acid production declines or when taking metformin or PPIs), vitamin D (when levels are low and sun exposure or mobility is limited), and folate (especially when B12 status is also compromised, to avoid masking nerve damage). Calcium and magnesium should ideally come from food, though supplementation may be warranted when intake is insufficient or osteoporosis is present. Multivitamins show limited evidence for general use, and high-dose antioxidant supplements may carry unexpected risks. Protein intake—often overlooked—deserves particular attention, as inadequate consumption accelerates sarcopenia.

Why it matters for you

If you're using MyKine to optimise your health, supplement decisions should flow from data, not assumption. Start by tracking actual dietary intake and identifying gaps. If you're supplementing TRT or peptides, nutrient status becomes even more critical: your body needs adequate B vitamins, magnesium, and zinc to support hormonal and metabolic function. Ordering a targeted micronutrient panel (B12, folate, vitamin D, iron) gives you a baseline and removes guesswork from your protocol.

The protein point is especially relevant if you're training to build or preserve muscle. Many people underestimate their intake—aim to log it and hit the evidence-based target. If you're taking medications (including PPIs for reflux), flag this in your health history; they actively suppress nutrient absorption, and supplementation becomes more defensible.

Avoid the "insurance policy" mentality with multivitamins or high-dose antioxidants. The data suggests they don't improve longevity markers or reduce mortality in generally well-nourished populations, and some high-dose formulations may increase risk. Instead, use your biomarkers to guide decisions: if your B12 is low, supplement it; if your vitamin D is optimal, you may not need more. This targeted approach is more efficient and safer than broad-spectrum supplementation.

Caveats

• The source cites observational data (like the multivitamin cohort studies) which cannot prove causation; associations with reduced mortality or improved ageing markers remain unclear
• Most specific supplement recommendations are based on mechanistic reasoning or small evidence bases; large randomized trials showing hard clinical benefit are limited
• The guidance is tailored to older adults; MyKine users may have different age profiles, training stimulus, or medication profiles that change the calculus
• "Adequate nutrition from food" is the benchmark, but assessing this requires honest dietary tracking, which many users underperform
• No details provided on optimal dosing, formulation (oral vs. injection for B12), or interaction risk with specific drugs beyond a few examples