STUDresearch · Non-peptide

Alpha-Ketoglutarate (AKG)

Also known as

Ca-AKG · calcium alpha-ketoglutarate

Community talk. May be wrong. Not medical advice. Not a protocol. Not for human or animal use.

Non-peptide Some talk Systemic Oral Longevity / cellular

Systemic metabolic intermediate supplement.

What people say A longevity-supplement topic: people try AKG, often calcium-AKG, for energy or recovery. Free acid and calcium, arginine or ornithine preparations are not interchangeable products. Doses people talk about

Ca-AKG-style oral products1–2+ g/day

Product or salt mass as labeled—not that amount of elemental calcium or necessarily free AKG. Product identity and fill accuracy remain separate uncertainties.

Amounts describe what is discussed, not an endorsed starting band. The exact salt, free-acid content and product label matter; oral, SC and nasal amounts cannot be treated as interchangeable.

Half-life & effect duration

Half-life in the body: Oral Ca-AKGNo settled estimate
Felt duration people report: Positive accountsEarly subtle changes or continuing benefit within a stack
Other accountsNothing over months or years; one stopped because of intolerance

Timing context & sources

How it may feel Reports range from subtle energy or exercise benefits to nothing noticeable, even after months. GI or mood changes can appear early, and an initially positive poster later stopped for intolerance.

Cycles people discuss Some take it daily for months or years; others stop or use breaks because of cost, no benefit or intolerance. Those accounts do not establish an ideal cycle. Timing Training, sleep and tolerability shape the timing discussion. Pig portal-vein clearance is not a clock for human oral supplements. Stacks NMN and resveratrol appear in longevity-marketing stacks with AKG. Multi-agent routines make subtle effects difficult to attribute. Watch for GI: Possible at high doses, and lower-dose or product-specific intolerance is also reported. One Ca-AKG poster stopped after stomach/bladder irritation across several preparations despite perceived benefits; this is an individual account, not a known response rate.

Tap a line to jump into the full notes. Research only — may be wrong.

Timing context & sources

Half-life in the body

A human oral Ca-AKG half-life is not established by the checked evidence.

The under-five-minute figure is for pig portal-vein administration. Human oral radiotracer work studied absorption of 5–20 g antidote formulations, not routine supplement clearance.

No animal-to-human or tracer-to-parent conversion; endogenous metabolism, formulation and exposure route remain distinct.

Dąbek et al. — pig AKG absorption and kinetics (opens in a new tab)Original abstract via Europe PMC core API: pigs studied by IV, portal-vein, oral, duodenal and ileal administration; under-five-minute blood half-life belongs specifically to portal-vein AKG.Pig portal-vein exposure, not human oral Ca-AKG, free-acid supplement or sustained-release PK. Other administration routes were studied but this reported half-life must not be assigned to all of them.
Mittal et al. — oral AKG radiotracer study (opens in a new tab)Original abstract via Europe PMC core API, Methods/Results: technetium-99m-labeled AKG, human oral 5–20 g single/split amounts and water-dependent absorption; animal cohorts separately described.An antidote-formulation absorption study, not ordinary 1–2 g/day Ca-AKG supplement PK. Radiotracer bioavailability is not a measured parent-AKG elimination half-life or a dosing instruction.

Felt duration people report

Some describe early subtle changes; others notice nothing over months or years.

Actual follow-ups include continuing benefit within a stack and an initially positive Ca-AKG account that stopped because of intolerance. No common single-dose duration emerges.

Self-report, different preparations and co-use; perceived changes after stopping do not measure clearance or prove dependence.

AKG experiences — benefits, nulls and later replies (opens in a new tab)Actual thread and visible follow-ups: Biohorology August 30, 2023 exercise benefit and April 17, 2026 continued use within a stack; vauss88 years of no observable effect; 1,000 mg/day four-month null account; January 17, 2026 one-week energy/stomach report.Different AKG forms, branded mixtures and stacks; not pooled efficacy or a standard onset. Commenters' five-minute human claims, salt-superiority claims and biological-age extrapolations are not adopted.
Ca-AKG report — initial benefits and intolerance follow-up (opens in a new tab)Actual magenk account: January 9, 2025 OP after roughly a month; brand-change replies; March 7 update reports stomach/bladder irritation even without piperine or with liposomal forms, stopping and perceived mood/appearance changes over 1–2 weeks.Long COVID, prednisone and changing products confound attribution. Subjective post-stop timing does not measure clearance or establish dependence. No new formulation is recommended.

What people say 5

Training recovery talk: Human evidence mixed. forum
Healthspan narrative: Alpha-Ketoglutarate (AKG) is discussed for aging markers, energy, or recovery more than acute gym pumps. forum
Slow endpoints: Users often run months, not days, before claiming anything — and still confabulate. anecdote
Stack noise: Frequently combined with multi-agent longevity stacks that destroy attribution. forum
Longevity mouse lore: AKG lifespan/healthspan narratives in animals. animal

Doses people talk about 6

Quality flag: Assume label accuracy only if analytically verified — gray market fill error is common. forum
Product quality: Gray-market fill accuracy and identity are uncertain; dose math assumes the label is true. forum
Route changes the math: Oral vs SC vs nasal are not interchangeable milligram-for-milligram stories. forum
Gram oral bands: Commonly discussed 1–2+ g/day calcium-AKG-style products. This describes product or salt mass as labeled, not 1–2+ g of elemental calcium or a guaranteed equivalent amount of free AKG. forum
Start conservative (community): When people experiment, they often start at the low end of a charted band to gauge tolerance — still not advice. forum
Framing: All figures are discussed trial, clinic, or community amounts — research/educational only, not prescriptions. forum

How it may feel 5

Days 1–7: Oral GI/mood changes are discussed. The original conditional site-reaction note concerns injection, not the ordinary oral supplement route, and does not establish an AKG injection practice or an onset window. forum
Months: Supplement discussions span months or ongoing use. Actual accounts range from subtle exercise benefits with continued stacked use to no observable effect over months or years. A Ca-AKG poster later stopped for stomach/bladder irritation despite perceived benefits. forum
Day 1: Oral route and GI tolerability are more practical talking points than a “miracle” effect from AKG; the generic sting comparison applies only if injected, not to usual capsules, tablets or powder. forum
Days 2–7: Side-effect window for many agents; benefits, if any, are easy to mis-attribute. forum
Weeks 1–2: First honest checkpoint in self-logs. forum

Cycles people discuss 4

Daily ongoing: Some community accounts describe daily oral supplementation for months or years; others stop for no benefit or intolerance. This is a use pattern, not a validated on/off schedule. forum
Other patterns: Weeks-on / weeks-off self-protocols also appear in broader discussion, with cost and caution as rationales rather than hard science. They are not a universal AKG pattern and coexist with the daily ongoing accounts above. forum
No magic cycle: There is rarely one universal “correct” on/off calendar across forums. forum
Reassess: Stop and reassess if adverse effects appear; this is not medical care. forum

Timing 3

Timing practicalities: People time doses around side effects, training, and sleep more than perfect PK. forum
Metabolite turnover: The often-quoted blood half-life under five minutes comes from AKG delivered into the portal vein of pigs. It is not a human oral Ca-AKG half-life; a formulation-specific human parent estimate is not established by the sources checked here. animal
Published PK: Human oral AKG radiotracer work used 5–20 g in an antidote-formulation absorption study. It does not establish an elimination half-life for ordinary Ca-AKG supplements, and tracer absorption is not intact-parent residence. trial

Stacks 2

With NMN/resveratrol marketing stacks: AKG is discussed alongside NMN and resveratrol in longevity stacks; combined use makes individual effects difficult to attribute. forum
Less is clearer: Solo runs make personal n=1 easier to interpret than five-compound blasts. forum

Storage notes 2

No mix instructions here: STUDresearch does not list reconstitution, diluent volumes, or syringe unit charts. People reconstitute many different ways and vial labels differ — that content creates more confusion than clarity. forum
Storage (general talk only): Unopened research products are usually kept cool, dry, and away from light per the seller label. Anything after first use is product-specific — follow the label, not a universal forum SOP. forum

Related 4

Watch for 6

GI: Possible at high doses, and lower-dose or product-specific intolerance is also reported. One Ca-AKG poster stopped after stomach/bladder irritation across several preparations despite perceived benefits; this is an individual account, not a known response rate. forum
General caution: Research chemical and compounded sources vary; adverse events may be under-reported. forum
Injection site (if injected): Redness, itch, lumps, bruise — technique and product quality matter. forum
Unknowns: Long-term safety for gray-market preparations is often poorly characterized. forum
Stack noise: Sides logged on multi-agent stacks cannot be blamed cleanly on one compound. forum
Seek care red flags: Severe allergic reaction, chest pain, neuro changes, or uncontrolled BP/glucose need real medical care — not forum advice. forum

Updated: 2026-08-12

Evidence mix Mostly community / anecdote tags Full: every bullet (trial + community). Use Scan for a faster bro-science read.

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Half-life & effect duration

Timing context & sources⌄

Half-life in the body

Felt duration people report

What people say 5

Doses people talk about 6

How it may feel 5

Cycles people discuss 4

Timing 3

More on what it is 5

Stacks 2

Storage notes 2

Related 4

Watch for 6

Timing context & sources