Category: For You
Ageing changes how the body absorbs and makes certain nutrients, not just how much of them it needs. That single shift reframes the entire supplement shelf for anyone over 60. Here is the honest, evidence-graded version.
Category: Demographic | Reading time: ~13 min | Level: Beginner
Ask most people what changes nutritionally as they get older, and the instinctive answer is need: older bodies, the thinking goes, simply require more of certain vitamins. That instinct is only half right, and the half it misses is the more interesting one. What changes most sharply after 60 is not always how much a nutrient you need. It is how efficiently your body can get it out of your food, make it from sunlight, or put it to use once it arrives.
That reframing matters because it changes what "eating well" actually means at this stage of life. A 65-year-old and a 25-year-old can eat an almost identical diet, rich in meat, fish, dairy and reasonable sun exposure, and still end up with meaningfully different nutrient status, because the digestive and metabolic machinery processing that identical diet has quietly changed. Stomach acid production can decline. Skin becomes less efficient at the chemical reaction that makes vitamin D from sunlight. Muscle becomes less responsive to a given dose of dietary protein. None of these are dramatic events. They are gradual shifts in efficiency, and they are the actual reason certain supplements matter more after 60, not because ageing invents a new nutritional need out of nowhere.
This is also the article's second, more surprising honest point: most of what gets marketed as an "energy" or "brain" supplement for older adults does very little unless a real, testable deficiency is present. The nutrients that matter here, B12, vitamin D, protein, omega-3, matter for specific, well-defined reasons, and the honest version of this topic is closer to "test, do not guess" than "take more of everything." This is written as general education, not a diagnosis of you individually. A blood test and a conversation with a clinician are how any of this becomes personal.
The short answer: ageing changes absorption and synthesis more than it changes raw nutrient need, and that single shift explains most of what actually matters on the supplement shelf after 60. Vitamin B12 status commonly falls because reduced stomach acid and a protein called intrinsic factor make B12 harder to release from food, so a crystalline supplement form, which skips that step, tends to be better absorbed [1]. Vitamin D production in skin becomes less efficient with age, which is why the recommended intake rises to 800 IU (20mcg) a day after 70 [2]. Muscle also becomes less responsive to dietary protein, a change called anabolic resistance, which is why expert guidance suggests higher protein targets for older adults [3]. Meanwhile, the popular "brain" case for omega-3 is not well supported in healthy older adults [4], and lowering homocysteine with B vitamins does not translate into fewer heart attacks, a genuinely humbling finding from a large pooled analysis [5]. Testing, not assuming, is the honest way to apply any of this.
The core idea worth holding onto through the rest of this article is simple: the same diet can deliver less usable nutrition to an older body, not because the food changed, but because the processing did.
In the gut, stomach acid production can decline gradually with age, a change formally called atrophic gastritis when it becomes significant, and this specifically affects nutrients like B12 that need to be chemically released from food protein before they can be absorbed [1]. In the skin, the reaction that converts sunlight into usable vitamin D becomes less efficient with age, meaning the same amount of sun exposure produces less vitamin D than it would have decades earlier [2]. In muscle, cells become less responsive to the signal that dietary protein normally sends to build or maintain tissue, so the same protein intake achieves less than it once did [3].
The mechanism worth stating plainly: these are each separate, tissue-specific efficiency losses, in the stomach, the skin and the muscle respectively, not a single generalised decline, which is exactly why the fix for each is specific (a different form of a nutrient, a higher intake target, more protein) rather than one universal "senior" supplement solving all three at once.
This is the clearest and best-documented example of the absorption story, and it is worth walking through carefully because the mechanism explains the entire recommendation that follows from it.
Between roughly 3 and 43 percent of community-dwelling older adults have low B12 status, a wide range reflecting differences between populations and how status was measured, but consistently a meaningful proportion [1]. Atrophic gastritis, affecting an estimated 8 to 9 percent of adults over 65, reduces stomach acid and intrinsic factor, the two things needed to release B12 from the protein it is bound to in meat, fish, eggs and dairy [1]. The person is eating B12. Their digestive system is simply less able to extract it from food the way it once did.
This is precisely why crystalline B12, the free form used in supplements and fortified foods, is generally better absorbed by older adults: it does not depend on the digestive step that has become less efficient [1]. Certain medications compound the picture. Metformin, widely used for type 2 diabetes, and long-term use of proton pump inhibitors or H2 blockers for acid reflux are both associated with reduced B12 status over time [1]. A genuine trap sits alongside this: high folic acid intake can mask B12 deficiency on a basic blood test by correcting the visible marker while the separate nerve damage from B12 deficiency continues unaddressed [1]. None of this means every older adult is B12 deficient, and it is worth being direct about the other side too: B12 supplementation does not improve energy or cognition in someone who is not actually deficient [1]. This is a testing question, not an assumption.
Yes, and the official guidance reflects it directly.
Skin synthesis of vitamin D, the reaction triggered by sunlight exposure, becomes less efficient with age [2]. That is the reason the recommended daily intake rises from 600 IU (15mcg) for younger adults to 800 IU (20mcg) for adults over 70 [2]. Vitamin D's relevance here sits mainly with bone and muscle, both areas where age-related decline is already a genuine concern, which is part of why this particular nutrient gets extra attention in older-adult guidance specifically rather than nutrition guidance generally.
As with any age group, more is not automatically better. The Tolerable Upper Intake Level remains 4,000 IU (100mcg) a day for adults, and there is no special older-adult exception that makes higher doses safer [2]. A sensible baseline intake, adjusted with medical input if a blood test shows a genuine shortfall, is the more measured approach than assuming a large dose is a precaution worth taking.
This one runs against a common assumption, that appetite and food needs naturally shrink with age, and the research pushes back on it specifically around muscle.
Ageing muscle shows what researchers call anabolic resistance: a blunted response to a given dose of dietary protein, meaning the same intake that once reliably supported muscle maintenance now does noticeably less [3]. Expert consensus from geriatric nutrition researchers has proposed that healthy older adults benefit from higher protein intakes than general population guidance suggests, roughly 1.0 to 1.2g per kilogram of body weight per day [3]. For a person weighing 70kg, that works out to roughly 70 to 84g of protein spread across the day, noticeably higher than many older adults, especially those with a smaller appetite, are used to eating.
This is a dietary point more than a supplement one. Protein powders can help some people reach that target where appetite is a genuine barrier, but the underlying goal is total daily protein from any combination of food and supplement, spread reasonably across meals, rather than a specific product.
This is the honest disappointment of the group, and it deserves to be stated as clearly as the genuine findings above.
Omega-3 fatty acid supplements have not been shown to improve cognitive function in healthy older adults, and trials conducted specifically in Alzheimer's disease have also not demonstrated a cognitive benefit [4]. This runs directly against a large amount of marketing that positions fish oil as a brain-protective supplement for later life. Omega-3's better-supported roles sit elsewhere, particularly around triglyceride levels and cardiovascular risk in certain populations, contexts that are not the same as everyday memory or cognitive sharpness [4]. If the reason someone is taking omega-3 is specifically to protect memory or thinking, the current trial evidence does not back that expectation, and it is worth separating that hope from the areas where omega-3's evidence is genuinely stronger.
This is arguably the most important lesson in the whole topic, because it shows how a real, measurable biological effect can still fail to translate into the outcome people actually care about.
B12 combined with folic acid reliably lowers homocysteine, an amino acid in the blood that observational studies have linked to cardiovascular risk [5]. That sounds like it should matter. But a large pooled analysis spanning 15 studies and 71,422 participants found that lowering homocysteine with B vitamins did not prevent heart attacks or reduce death rates [5]. The number on the blood test moved. The outcome it was supposed to predict did not improve, a useful pattern to recognise anywhere in supplement research: a marker changing is not the same evidence as an outcome changing.
If fatigue, memory concerns or general low energy are on your mind, the most useful first step is a conversation with a GP about testing, specifically B12 and vitamin D status, rather than starting a stack of supplements aimed generally at "energy" or "brain health." This article is general education, not a diagnosis, and it cannot tell you whether your particular symptoms have a nutritional cause.
If you are on metformin long term, or a proton pump inhibitor or H2 blocker for reflux, it is reasonable to ask that B12 be checked periodically, given the established association between these medications and reduced B12 status [1]. If a test shows low B12, a crystalline supplement form is generally the more effective choice for older adults, since it avoids the digestive step that becomes less efficient with age [1].
For vitamin D, a standard baseline intake is a reasonable, low-risk choice for most adults over 60, rising toward 800 IU (20mcg) for those over 70, with testing to confirm whether more is genuinely needed [2].
For protein, treat this as a food pattern question rather than only a supplement one. Spreading intake across meals, aiming toward roughly 1.0 to 1.2g per kilogram of body weight daily where appetite allows, supports the muscle-maintenance goal that anabolic resistance makes harder to achieve on autopilot [3].
Pregnant, breastfeeding, or on medication? Check with a healthcare professional first.
Vitamin B12 has no established Tolerable Upper Intake Level and is generally considered very low risk even at doses well above standard guidance, because excess is not stored the way fat-soluble vitamins are [1]. The real safety issue with B12 is not the supplement itself but the folic acid interaction: high folic acid intake can mask a B12 deficiency on standard blood tests while nerve-related harm continues, which is why B12 specifically, not just a general blood count, is the test worth asking for [1].
Vitamin D is fat-soluble and has a genuine upper limit, 4,000 IU (100mcg) a day for adults, and sustained high intakes without medical supervision are not advisable [2]. Anyone with kidney disease or a condition affecting calcium metabolism should have vitamin D supplementation guided by a clinician.
Anyone on regular medication, particularly metformin, proton pump inhibitors, H2 blockers, or anticoagulants, should discuss any new supplement with the prescriber managing it, both because of the B12 association above and because omega-3 at high intakes can have a mild blood-thinning effect worth accounting for alongside anticoagulant therapy [1] [4].
This article is educational and general. It is not a diagnosis, and it is not a substitute for a blood test or a conversation with a GP about your individual situation.
Pregnant, breastfeeding, or on medication? Check with a healthcare professional first.
We do not have a specific remedy in our range built around this topic, and we would rather say that plainly than stretch an unrelated product to fit. The honest, useful thing we can offer here is the information itself: a clear account of why absorption, not just need, is the real story after 60, and a nudge toward testing over guessing.
If you want to talk through your own situation, particularly around medications like metformin or long-term reflux treatment that are known to affect B12 status, Remy can help you think through what is worth raising with a GP, and our Remedy Library remains a place to look up the evidence behind individual ingredients honestly graded, without a product pushed at the end of every search.
The uncomfortable, useful idea in all of this is that nothing about your diet necessarily has to go wrong for your nutrient status to change. You can eat exactly as well at 68 as you did at 38, and still end up with a B12 or vitamin D gap that a supplement addresses better than any dietary tweak could, simply because the body doing the processing is not the same body it was thirty years earlier. That is not a failure of willpower or diet quality. It is biology working exactly as expected. The right response is not more supplements taken on faith, but a small number of specific, well-evidenced ones, chosen because a test showed they were actually needed.
The FAQ entries above answer what people actually search: why B12 deficiency is common after 60, whether older adults need more vitamin D or protein, and whether omega-3 or B vitamins genuinely protect the brain or heart. The short version: absorption and synthesis change with age in specific, well-documented ways, crystalline B12 and adjusted vitamin D and protein targets address real mechanisms, and the popular brain and heart claims for omega-3 and homocysteine-lowering are not well supported by the evidence. Testing beats guessing throughout.
1. NIH Office of Dietary Supplements (2023). Vitamin B12 Fact Sheet for Health Professionals. Institutional fact sheet. 2. NIH Office of Dietary Supplements (2023). Vitamin D Fact Sheet for Health Professionals. Institutional fact sheet. 3. Bauer J, et al., PROT-AGE Study Group (2013). Evidence-based recommendations for optimal dietary protein intake in older people. Journal of the American Medical Directors Association. Expert consensus statement. 4. NIH Office of Dietary Supplements (2023). Omega-3 Fatty Acids Fact Sheet for Health Professionals. Institutional fact sheet. 5. NIH Office of Dietary Supplements (2023), summarising a Cochrane systematic review of B vitamins, homocysteine and cardiovascular disease (15 studies, 71,422 participants). Institutional fact sheet citing Cochrane systematic review.
Mainly because of a change in absorption, not diet. Atrophic gastritis, a reduction in stomach acid production that affects an estimated 8 to 9 percent of adults over 65, makes it harder to release vitamin B12 from the protein in food. Between roughly 3 and 43 percent of community-dwelling older adults have low B12 status, a wide range that reflects how much this varies by population and how status is measured. Because the problem is absorption of food-bound B12 specifically, not B12 intake, a supplement in crystalline form, which does not require that same digestive step, is generally better absorbed by older adults.
Food-bound B12 is attached to protein in meat, fish, eggs and dairy, and releasing it requires stomach acid and a protein called intrinsic factor. Crystalline B12, the form used in supplements and fortified foods, is already free of that protein binding, so it does not depend on the same digestive step. This distinction matters specifically for older adults, because the digestive step that food-bound B12 needs is exactly the one that becomes less efficient with age.
The recommended intake rises to 800 IU (20mcg) a day for adults over 70, compared with 600 IU (15mcg) for younger adults, reflecting that skin becomes less efficient at producing vitamin D from sunlight with age. Vitamin D is relevant to bone and muscle function, both particularly important as people age. As with any age group, the safe upper limit is 4,000 IU (100mcg) a day, and going well beyond standard guidance is not advisable without medical reason.
Many expert groups think so, and the reasoning is about efficiency rather than appetite. Ageing muscle shows anabolic resistance, a blunted response to a given dose of dietary protein compared with younger muscle, meaning the same protein intake builds or maintains less muscle than it once did. Consensus guidance from geriatric nutrition researchers has proposed intakes of roughly 1.0 to 1.2g of protein per kilogram of body weight per day for healthy older adults, higher than typical general-population guidance.
The evidence does not support this as a general claim. Omega-3 fatty acid supplements have not been shown to improve cognitive function in healthy older adults, and trials in Alzheimer's disease have not shown a cognitive benefit either. Omega-3's better-supported roles sit elsewhere, particularly around triglyceride levels and cardiovascular risk in specific populations. The brain-protection positioning common in marketing is the weakest part of the omega-3 case.
No, and this is one of the clearer lessons in supplement research. B12 combined with folic acid reliably lowers homocysteine, an amino acid in the blood linked in observational studies to cardiovascular risk. But when this was tested directly across a large pooled analysis spanning 15 studies and over 71,000 participants, lowering homocysteine did not translate into fewer heart attacks or lower death rates. Changing a number on a blood test is not the same as changing an outcome that matters.
A general multivitamin is a reasonable low-risk baseline for some people, but it is not a substitute for identifying an actual gap, particularly for B12, where a multivitamin's standard dose may not suit someone with an absorption problem rather than a simple dietary shortfall. Where energy, memory or fatigue are the concern, testing for a genuine deficiency is a more honest starting point than assuming a supplement will fix a symptom with an unconfirmed cause.
Fatigue, slower recall and general tiredness are extremely common complaints at any age, and they become an easy audience for marketing once framed as an inevitable part of getting older. But the evidence is consistent on one point: nutrients like B12 and omega-3 help when a genuine deficiency or established medical need exists, and do little to nothing when it does not. Selling a general 'energy' or 'brain' fix to an entire age group, most of whom are not deficient, is a marketing framing more than an evidence-based one.
Because folic acid and B12 deficiency can produce a similar blood picture on a basic test, and high folic acid intake can correct that visible marker while doing nothing for the separate nerve damage that untreated B12 deficiency causes. This means folic acid can effectively mask a B12 problem on a simple test while the underlying issue continues, which is exactly why clinicians tend to want B12 checked specifically, not inferred from folate status alone.
Not reliably. Atrophic gastritis is a gradual reduction in stomach acid production, and it does not necessarily come with obvious symptoms that would prompt someone to suspect it. That is part of why B12 status is worth checking directly with a blood test in this age group rather than relying on how someone feels day to day, since a silent absorption change can be present well before any deficiency symptoms appear.
Yes, certain commonly used medications are known to reduce B12 status over time, including metformin, used for type 2 diabetes, and long-term use of proton pump inhibitors or H2 blockers, used for acid reflux. This is not a reason to stop a prescribed medication without medical advice, but it is a reason someone on these medications long-term may want B12 status checked periodically as part of routine care.