What Is Longevity Science?
Longevity science investigates why organisms age, why their lifespans differ, and which changes might preserve health as time passes. Its most useful question is not simply “Can we live…
2 min read · 2 sources→What Are Mitochondrial Peptides?
“Mitochondrial peptide” can describe several different things. In the aging literature, it often refers to mitochondrial-derived peptides: small signaling molecules reported to arise from…
2 min read · 1 source→What Is MOTS-c?
MOTS-c is a 16-amino-acid mitochondrial-derived peptide studied in metabolic signaling and cellular stress responses. Its name refers to a mitochondrial open reading frame associated with…
2 min read · 4 sources→What Is Cellular Senescence?
Cellular senescence is a state in which a cell stops dividing in a durable way while remaining metabolically active. It is not the same as cell death, and it is not simply another word for…
2 min read · 1 source→How Does Mitochondrial Function Change With Age?
Mitochondrial function can change with age, but there is no single decline curve that describes every organ or every person. Mitochondria form dynamic networks, and their performance…
2 min read · 2 sources→What Is Oxidative Stress?
Oxidative stress describes a disruption in the balance between reactive chemical species and the systems that regulate or repair their effects. Reactive oxygen species can alter lipids,…
2 min read · 1 source→What Is NAD+?
NAD+ is nicotinamide adenine dinucleotide, a molecule cells use in essential biochemical reactions. It is a coenzyme, not a peptide. NAD+ and its reduced form, NADH, help transfer electrons…
2 min read · 2 sources→How Do Scientists Study Cellular Aging?
Scientists study cellular aging by combining models and measurements. A cultured cell can reveal a mechanism under controlled conditions. An animal can show how that mechanism interacts…
2 min read · 2 sources→What Are Senolytics?
Senolytics are agents being studied for their ability to selectively eliminate certain senescent cells. They are a research strategy, not a single ingredient or a guarantee of rejuvenation.…
2 min read · 2 sources→What Are Biomarkers of Biological Aging?
Biomarkers of biological aging are measurable features researchers use to study age-associated biological change. They may include molecular patterns, physiological measurements or…
2 min read · 1 source→What Is Metabolic Flexibility?
Metabolic flexibility is the ability to adjust fuel use to changing conditions, such as eating, fasting, exercise or rest. It does not mean burning only fat, avoiding carbohydrate, or…
2 min read · 1 source→What Is Mitochondrial Biogenesis?
Mitochondrial biogenesis is the coordinated production of mitochondrial components and expansion of the mitochondrial system. It involves communication between the nuclear and mitochondrial…
2 min read · 2 sources→What Is Autophagy?
Autophagy is a group of cellular processes that deliver material for breakdown and recycling. In macroautophagy, often shortened simply to autophagy, a membrane structure encloses cellular…
2 min read · 2 sources→What Is the Difference Between Lifespan and Healthspan?
Lifespan is how long an organism lives. Healthspan concerns how much of that life is spent in good health or with preserved function. The distinction matters because an intervention could…
2 min read · 1 source→What Evidence Is Needed to Establish an Anti-Aging Intervention?
An anti-aging claim needs more than a plausible mechanism or a favorable biomarker. It must define what “anti-aging” means, show that the intervention produces that outcome, and demonstrate…
2 min read · 1 source→NAD related research and epitalon ask different aging questions
NAD is a cellular coenzyme, not a peptide. Epitalon is discussed in peptide research. Grouping them as equivalent “longevity peptides” obscures differences in chemistry, biological…
2 min read · 3 sources→Klotho Research Requires Distinguishing a Protein from a Promise
Klotho is studied in aging biology, but the expression “klotho peptide” can hide important differences among a full protein, a fragment and a commercial research material. An evidence…
2 min read · 2 sources→Humanin Research Begins with Specific Cell Rescue Experiments
Humanin entered the literature through experiments seeking factors that could protect neuronal cells against selected Alzheimer-related insults. The original work identified a short…
2 min read · 2 sources→NAD NMN and NR Should Be Compared by What Was Measured
NAD is a coenzyme involved in cellular metabolism. NMN and nicotinamide riboside, or NR, are related to pathways that produce NAD, but they are not identical substances. A study of one…
2 min read · 2 sources→NAD Tablet Claims Need an Exact Ingredient and Outcome
A tablet described as an NAD product may contain NAD itself, a precursor such as NR or NMN, or a combination. The front label is not enough to identify which evidence applies. Start with…
2 min read · 2 sources→Nasal NAD Research Should Not Be Mistaken for a Human Trial
Intranasal NAD has been investigated experimentally, but the model must be named clearly. A 2026 study used cultured human olfactory stem cells and mice with experimentally induced loss of…
2 min read · 2 sources→MOTS c Spray Claims Add a Delivery Question to a Biology Question
MOTS-c is a mitochondrial-derived peptide studied in metabolism. Foundational experiments investigated cellular pathways and reported metabolic effects in mice. That research supports…
2 min read · 4 sources→Epitalon Telomere Experiments Do Not Establish a Longevity Spray
Epitalon, also spelled epithalon in the literature, has been studied in telomere biology. A 2003 experiment reported telomerase-related effects in cultured human cells. A later study…
2 min read · 3 sources→Elamipretide and MOTS c Illustrate Different Stages of Mitochondrial Research
Mitochondrial biology is a broad field, not a single treatment category. Elamipretide, often called SS 31 in research discussions, and MOTS c are frequently paired online because both are…
2 min read · 5 sources→Epitalon and Telomeres: A Cellular Finding Is Not Longevity Proof
Telomeres are attractive targets in aging research because they connect chromosome biology with cell behavior. That connection does not make telomere length a simple measure of how long a…
2 min read · 2 sources→